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Hummelen, Prof. Kees

Kees Hummelen
Kees Hummelen

Kees Hummelen is professor of Chemistry of Molecular Organic and Bio-organic Materials at the University of Groningen. Together with his staff he is involved in the creation of plastic solar panels. Plastic is significantly cheaper than the resources that are normally used for the production of solar cells. However, the returns are not yet high enough for plastic to be able to compete. The reducing agent Hummelen is using is a special type of polymer, a so-called conjugated polymer, which is coloured and can therefore absorb more light and conduct better. Polymers are long molecules with complex structures. The other substance used, the electron acceptor, is a buckyball, a molecule shaped like a football which consists of sixty carbon atoms.

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Publications

2022

Rahimichatri, A., Liu, J., Jahani, F., Qiu, L., Chiechi, R. C., Hummelen, J. C., & Koster, L. J. A. (2022). A method for identifying the cause of inefficient salt-doping in organic semiconductors. Journal of Materials Chemistry C, 10(36), 13093-13098. https://doi.org/10.1039/d1tc06062g
Rousseva, S., Raul, B. A. L., van Kooij, F. S., Kuevda, A. V., Birudula, S., Hummelen, J. C., Pshenichnikov, M. S., & Chiechi, R. C. (2022). Investigating the dielectric properties and exciton diffusion in C70 derivatives. Physical Chemistry Chemical Physics, 24(22), 13763-13772. https://doi.org/10.1039/d2cp00791f

2021

Dong, J., Sami, S., Balazs, D. M., Alessandri, R., Jahani, F., Qiu, L., Marrink, S. J., Havenith, R. W. A., Hummelen, J. C., Loi, M. A., & Portale, G. (2021). Fullerene derivatives with oligoethylene-glycol side chains: An investigation on the origin of their outstanding transport properties. Journal of Materials Chemistry C, 9(45), 16217-16225. https://doi.org/10.1039/d1tc02753k
Qiu, X., Rousseva, S., Ye, G., Hummelen, J. C., & Chiechi, R. C. (2021). In Operando Modulation of Rectification in Molecular Tunneling Junctions Comprising Reconfigurable Molecular Self-Assemblies. Advanced materials, 33(4), Article e2006109. https://doi.org/10.1002/adma.202006109
Liu, J., Van der Zee, B., Villava, D. R., Ye, G., Kahmann, S., Kamperman, M., Dong, J., Qiu, L., Portale, G., Loi, M. A., Hummelen, J. C., Chiechi, R. C., Baran, D., & Koster, L. J. A. (2021). Molecular Doping Directed by a Neutral Radical. ACS Applied Materials and Interfaces, 13(25), 29858–29865. https://doi.org/10.1021/acsami.1c03411

2020

Koopmans, M., Leiviskä, M. A. T., Liu, J., Dong, J., Qiu, L., Hummelen, J. C., Portale, G., Heiber, M. C., & Koster, L. J. A. (2020). Electrical Conductivity of Doped Organic Semiconductors Limited by Carrier-Carrier Interactions. ACS Applied Materials & Interfaces, 12(50), 56222-56230. https://doi.org/10.1021/acsami.0c15490
Massetti, M., Bonfadini, S., Nava, D., Butti, M., Criante, L., Lanzani, G., Qiu, L., Hummelen, J. C., Liu, J., Koster, L. J. A., & Caironi, M. (2020). Fully direct written organic micro-thermoelectric generators embedded in a plastic foil. Nano energy, 75, Article 104983. https://doi.org/10.1016/j.nanoen.2020.104983
Liu, J., van der Zee, B., Alessandri, R., Sami, S., Dong, J., Nugraha, M. I., Barker, A. J., Rousseva, S., Qiu, L., Qiu, X., Klasen, N., Chiechi, R. C., Baran, D., Caironi, M., Anthopoulos, T. D., Portale, G., Havenith, R. W. A., Marrink, S. J., Hummelen, J. C., & Koster, L. J. A. (2020). N-type organic thermoelectrics: demonstration of ZT > 0.3. Nature Communications, 11(1), Article 5694. https://doi.org/10.1038/s41467-020-19537-8
Rousseva, S., den Besten, H., van Kooij, F. S., Doting, E. L., Doumon, N. Y., Douvogianni, E., Koster, L. J. A., & Hummelen, J. C. (2020). Reaching a Double-Digit Dielectric Constant with Fullerene Derivatives. Journal of Physical Chemistry C, 124(16), 8633-8638. https://doi.org/10.1021/acs.jpcc.0c01390
Qiu, X., Ivasyshyn, V., Qiu, L., Enache, M., Dong, J., Rousseva, S., Portale, G., Stöhr, M., Hummelen, J. C., & Chiechi, R. C. (2020). Thiol-free self-assembled oligoethylene glycols enable robust air-stable molecular electronics. Nature Materials, 19, 330-337. https://doi.org/10.1038/s41563-019-0587-x

2019

Ye, G., Doumon, N. Y., Rousseva, S., Liu, Y., Abdu-Aguye, M., Loi, M. A., Hummelen, J. C., Koster, L. J. A., & Chiechi, R. C. (2019). Conjugated Polyions Enable Organic Photovoltaics Processed from Green Solvents. ACS Applied Energy Materials, 2(3), 2197-2204. https://doi.org/10.1021/acsaem.8b02226
Liu, J., Garman, M. P., Dong, J., van der Zee, B., Qiu, L., Portale, G., Hummelen, J. C., & Koster, L. J. A. (2019). Doping Engineering Enables Highly Conductive and Thermally Stable n-Type Organic Thermoelectrics with High Power Factor. ACS Applied Energy Materials, 2(9), 6664-6671. https://doi.org/10.1021/acsaem.9b01179
Vezie, M. S., Azzouzi, M., Telford, A. M., Hopper, T. R., Sieval, A. B., Hummelen, J. C., Fallon, K., Bronstein, H., Kirchartz, T., Bakulin, A. A., Clarke, T. M., & Nelson, J. (2019). Impact of Marginal Exciton-Charge-Transfer State Offset on Charge Generation and Recombination in Polymer: Fullerene Solar Cells. ACS Energy Letters, 4(9), 2096-2103. https://doi.org/10.1021/acsenergylett.9b01368
Liu, J., Maity, S., Roosloot, N., Qiu, X., Qiu, L., Chiechi, R. C., Hummelen, J. C., von Hauff, E., & Koster, L. J. A. (2019). The Effect of Electrostatic Interaction on n-Type Doping Efficiency of Fullerene Derivatives. Advanced electronic materials, 5(11), Article 1800959. https://doi.org/10.1002/aelm.201800959

2018

Brebels, J., Douvogianni, E., Devisscher, D., Eachambadi, R. T., Manca, J., Lutsen, L., Vanderzande, D., Hummelen, J. C., & Maes, W. (2018). An effective strategy to enhance the dielectric constant of organic semiconductors - CPDTTPD-based low bandgap polymers bearing oligo(ethylene glycol) side chains. Journal of Materials Chemistry C, 6(3), 500-511. https://doi.org/10.1039/c7tc05264b
Nieuwendaal, R. C., DeLongchamp, D. M., Richter, L. J., Snyder, C. R., Jones, R. L., Engmann, S., Herzing, A., Heeney, M., Fei, Z., Sieval, A. B., & Hummelen, J. C. (2018). Characterization of Interfacial Structure in Polymer-Fullerene Bulk Heterojunctions via C-13 {H-2} Rotational Echo Double Resonance NMR. Physical Review Letters, 121(2), Article 026101. https://doi.org/10.1103/PhysRevLett.121.026101
Liu, J., Qiu, L., Alessandri, R., Qiu, X., Portale, G., Dong, J., Talsma, W., Ye, G., Sengrian, A. A., Souza, P. C. T., Loi, M. A., Chiechi, R. C., Marrink, S. J., Hummelen, J. C., & Koster, L. J. A. (2018). Enhancing Molecular n-Type Doping of Donor-Acceptor Copolymers by Tailoring Side Chains. Advanced materials, 30(7), Article 1704630. https://doi.org/10.1002/adma.201704630
Ivasyshyn, V. E., Ye, G., Rousseva, S., Hummelen, K., & Chiechi, R. (2018). Increasing the Dielectric Constant of Organic Materials for Photovoltaics. In S. K. Kurinec (Ed.), Emerging Photovoltaic Materials: Silicon & Beyond (pp. 403-441). Scrivener Publishing LLC. https://doi.org/10.1002/9781119407690.ch11
Liu, J., Qiu, L., Portale, G., Torabi, S., Stuart, M. C. A., Qiu, X., Koopmans, M., Chiechi, R. C., Hummelen, J. C., & Koster, L. J. A. (2018). Side-chain effects on N-type organic thermoelectrics: A case study of fullerene derivatives. Nano energy, 52, 183-191. https://doi.org/10.1016/j.nanoen.2018.07.056
Douvogianni, E., Qiu, X., Qiu, L., Jahani, F., Kooistra, F. B., Hummelen, J. C., & Chiechi, R. C. (2018). Soft Nondamaging Contacts Formed from Eutectic Ga-In for the Accurate Determination of Dielectric Constants of Organic Materials. Chemistry of Materials, 30(16), 5527-5533. https://doi.org/10.1021/acs.chemmater.8b02212

2017

Shao, S., Liu, J., Fang, H.-H., Qiu, L., ten Brink, G. H., Hummelen, J. C., Koster, L. J. A., & Loi, M. A. (2017). Efficient Perovskite Solar Cells over a Broad Temperature Window: The Role of the Charge Carrier Extraction. Advanced Energy Materials, 7(22), Article 1701305. https://doi.org/10.1002/aenm.201701305
Qiu, L., Liu, J., Alessandri, R., Qiu, X., Koopmans, M., Havenith, R. W. A., Marrink, S. J., Chiechi, R. C., Koster, L. J. A., & Hummelen, J. C. (2017). Enhancing doping efficiency by improving host-dopant miscibility for fullerene-based n-type thermoelectrics. Journal of Materials Chemistry A, 5(40), 21234-21241. https://doi.org/10.1039/c7ta06609k
Zhou, D., Doumon, N. Y., Abdu-Aguye, M., Bartesaghi, D., Loi, M. A., Koster, L. J. A., Chiechi, R. C., & Hummelen, J. C. (2017). High-quality conjugated polymers via one-pot Suzuki-Miyaura homopolymerization. RSC Advances, 7(44), 27762-27769. https://doi.org/10.1039/c7ra03539j
Groeneveld, B. G. H. M., Najafi, M., Steensma, B., Adjokatse, S., Fang, H.-H., Jahani, F., Qiu, L., ten Brink, G. H., Hummelen, J. C., & Loi, M. A. (2017). Improved efficiency of NiOx-based p-i-n perovskite solar cells by using PTEG-1 as electron transport layer. APL Materials, 5(7), Article 076103. https://doi.org/10.1063/1.4992783
Liu, J., Qiu, L., Portale, G., Koopmans, M., Ten Brink, G., Hummelen, J. C., & Koster, L. J. A. (2017). N-Type Organic Thermoelectrics: Improved Power Factor by Tailoring Host-Dopant Miscibility. Advanced materials, 29(36), Article 1701641. https://doi.org/10.1002/adma.201701641
Shi, W., Hou, X., Liu, T., Zhao, X., Sieval, A. B., Hummelen, J. C., & Dennis, T. J. S. (2017). Purification and electronic characterisation of 18 isomers of the OPV acceptor material bis-[60]PCBM. Chemical Communications, 53(5), 975-978. https://doi.org/10.1039/c6cc07820f
Torabi, S., Cherry, M., Duijnstee, E. A., Le Corre, V. M., Qiu, L., Hummelen, J. C., Palasantzas, G., & Koster, L. J. A. (2017). Rough Electrode Creates Excess Capacitance in Thin-Film Capacitors. ACS Applied Materials and Interfaces, 9(32), 27290-27297. https://doi.org/10.1021/acsami.7b06451

2016

Torabi, S., Liu, J., Gordiichuk, P., Herrmann, A., Qiu, L., Jahani, F., Hummelen, J. C., & Koster, L. J. A. (2016). Deposition of LiF onto Films of Fullerene Derivatives Leads to Bulk Doping. ACS Applied Materials & Interfaces, 8(34), 22623-22628. https://doi.org/10.1021/acsami.6b05638
Shao, S., Abdu-Aguye, M., Qiu, L., Lai, L.-H., Liu, J., Adjokatse, S., Jahani Bahnamiri, F., Kamminga, M. E., Brink, ten, G., Palstra, T. T. M., Kooi, B. J., Hummelen, J. C., & Loi, M. A. (2016). Elimination of the light soaking effect and performance enhancement in perovskite solar cells using a fullerene derivative. Energy & Environmental Science, 9(7), 2444-2452. https://doi.org/10.1039/c6ee01337f
de Gier, H. D., Jahani , F., Broer, R., Hummelen, J. C., & Havenith, R. W. A. (2016). Promising Strategy To Improve Charge Separation in Organic Photovoltaics: Installing Permanent Dipoles in PCBM Analogues. The Journal of Physical Chemistry. A: Molecules, Spectroscopy, Kinetics, Environment, & General Theory, 120(27), 4664-4671. https://doi.org/10.1021/acs.jpca.5b09279
Qiu, L., Zhang, Y., Krijger, T., Qiu, X., van 't Hof, P., Hummelen, J., & Chiechi, R. (2016). Rectification of Current Responds to Incorporation of Fullerenes into Mixed-Monolayers of Alkanethiolates in Tunneling Junctions. Chemical Science. https://doi.org/10.1039/C6SC04799H
Koole, M., Hummelen, J. C., & van der Zant, H. S. J. (2016). Spin excitations in an all-organic double quantum dot molecule. Physical Review B, 94(16), Article 165414. https://doi.org/10.1103/PhysRevB.94.165414

2015

Savagatrup, S., Rodriquez, D., Printz, A. D., Sieval, A. B., Hummelen, J. C., & Lipomi, D. J. (2015). [70]PCBM and Incompletely Separated Grades of Methanofullerenes Produce Bulk Heterojunctions with Increased Robustness for Ultra-Flexible and Stretchable Electronics. Chemistry of Materials, 27(11), 3902-3911. https://doi.org/10.1021/acs.chemmater.5b00638
Sieval, A. B., Treat, N. D., Rozema, D., Hummelen, J. C., & Stingelin, N. (2015). Diels-Alders adducts of C-60 and esters of 3-(1-indenyl)-propionic acid: alternatives for [60]PCBM in polymer:fullerene solar cells. Chemical Communications, 51(38), 8126-8129. https://doi.org/10.1039/c5cc01642h
Koole, M., Thijssen, J. M., Valkenier, H., Hummelen, J. C., & van der Zant, H. S. J. (2015). Electric-Field Control of Interfering Transport Pathways in a Single-Molecule Anthraquinone Transistor. Nano Letters, 15(8), 5569-5573. https://doi.org/10.1021/acs.nanolett.5b02188
Torabi, S., Jahani, F., Van Severen, I., Kanimozhi, C., Patil, S., Havenith, R. W. A., Chiechi, R. C., Lutsen, L., Vanderzande, D. J. M., Cleij, T. J., Hummelen, J. C., & Koster, L. J. A. (2015). Strategy for Enhancing the Dielectric Constant of Organic Semiconductors Without Sacrificing Charge Carrier Mobility and Solubility. Advanced Functional Materials, 25(1), 150-157. https://doi.org/10.1002/adfm.201402244

2014

Valkenier, H., Guedon, C. M., Markussen, T., Thygesen, K. S., van der Molen, S. J., & Hummelen, J. C. (2014). Cross-conjugation and quantum interference: a general correlation? Physical Chemistry Chemical Physics, 16(2), 653-662. https://doi.org/10.1039/c3cp53866d
Sieval, A. B., & Hummelen, J. C. (2014). Fullerene-Based Acceptor Materials. In C. Brabec, U. Scherf, & V. Dyakonov (Eds.), Organic Photovoltaics: Materials, Device Physics, and Manufacturing Technologies: Second Edition (Vol. 9783527332250, pp. 209-238). Wiley-Blackwell. https://doi.org/10.1002/9783527656912.ch07
Jahani, F., Torabi, S., Chiechi, R. C., Koster, L. J. A., & Hummelen, J. C. (2014). Fullerene derivatives with increased dielectric constants. Chemical communications (Cambridge, England), 50(73), 10645-10647. https://doi.org/10.1039/c4cc04366a
Perrin, M. L., Frisenda, R., Koole, M., Seldenthuis, J. S., Gil, J. A. C., Valkenier , H., Hummelen, J. C., Renaud, N., Grozema, F. C., Thijssen, J. M., Dulic, D., & van der Zant, H. S. J. (2014). Large negative differential conductance in single-molecule break junctions. Nature Nanotechnology, 9(10), 830-834. https://doi.org/10.1038/NNANO.2014.177
Torabi, S., Jahani Bahnamiri, F., Van Severen, I., Patil, S., Havenith, R. W. A., Chiechi, R. C., Lutsen, L., Vanderzande, D., Cleij, T. J., Hummelen, J. C., & Koster, L. J. A. (2014). Strategy for Enhancing the Electric Permittivity of Organic Semiconductors. In Optical Nanostructures and Advanced Materials for Photovoltaics, PVLED 2014 Article JW6A.31 (Optics InfoBase Conference Papers). The Optical Society of America. https://doi.org/10.1364/E2.2014.JW6A.31

2013

Serbenta, A., Pavelyev, V. G., Hummelen, J. C., Loosdrecht, P. H. M. V., & Pshenichnikov, M. S. (2013). Exciton and Hole-Transfer Dynamics in Polymer: Fullerene Blends. In M. Chergui, S. Cundiff, A. Taylor, R. D. Vivie-Riedle, & K. Yamanouchi (Eds.), Proceedings of the XVIIIth International Conference on Ultrafast Phenomena (41 ed., Vol. 41, pp. 04012-p.1-04012-p.3). University of Groningen, Stratingh Institute for Chemistry.
Loi, M. A., & Hummelen, J. C. (2013). Hybrid solar cells: Perovskites under the Sun. Nature Materials, 12(12), 1087-1089. https://doi.org/10.1038/nmat3815
Chiechi, R. C., Havenith, R. W. A., Hummelen, J. C., Koster, L. J. A., & Loi, M. A. (2013). Modern plastic solar cells: materials, mechanisms and modeling. Materials Today, 16(7-8), 281-289. https://doi.org/10.1016/j.mattod.2013.07.003
Nuzzo, D. D., Wetzelaer, G.-J. A. H., Bouwer, R. K. M., Gevaerts, V. S., Meskers, S. C. J., Hummelen, J. C., Blom, P. W. M., & Janssen, R. A. J. (2013). Simultaneous Open-Circuit Voltage Enhancement and Short-Circuit Current Loss in Polymer: Fullerene Solar Cells Correlated by Reduced Quantum Efficiency for Photoinduced Electron Transfer. Advanced Energy Materials, 3(1), 85-94. https://doi.org/10.1002/aenm.201200426
Frisenda, R., Perrin, M. L., Valkenier, H., Hummelen, J. C., & Zant, H. S. J. V. D. (2013). Statistical analysis of single-molecule breaking traces. Physica Status Solidi B, 250(11), 2431-2436. https://doi.org/10.1002/pssb.201349236

2012

Zou, W., Visser, C., Maduro, J. A., Pshenichnikov, M. S., & Hummelen, J. C. (2012). Broadband dye-sensitized upconversion of near-infrared light. Nature Photonics, 6(8), 560-564. https://doi.org/10.1038/nphoton.2012.158
Kaliginedi, V., Moreno-Garcia, P., Valkenier -van Dijk, H., Hong, W., Garcia-Suarez, V. M., Buiter, P., Otten, J. L. H., Hummelen, J. C., Lambert, C. J., & Wandlowski, T. (2012). Correlations between Molecular Structure and Single-Junction Conductance: A Case Study with Oligo(phenylene-ethynylene)-Type Wires. Journal of the American Chemical Society, 134(11), 5262-5275. https://doi.org/10.1021/ja211555x
Bouwer, R. K. M., Wetzelaer, G.-J. A. H., Blom, P. W. M., & Hummelen, J. C. (2012). Influence of the isomeric composition of the acceptor on the performance of organic bulk heterojunction P3HT: bis-PCBM solar cells. Journal of Materials Chemistry, 22(30), 15412-15417. https://doi.org/10.1039/c2jm32993j
Guedon, C. M., Valkenier, H., Markussen, T., Thygesen, K. S., Hummelen, J. C., & van der Molen, S. J. (2012). Observation of quantum interference in molecular charge transport. Nature Nanotechnology, 7(5), 304-308. https://doi.org/10.1038/NNANO.2012.37
Koster, L. J. A., Shaheen, S. E., & Hummelen, J. C. (2012). Pathways to a New Efficiency Regime for Organic Solar Cells. Advanced Energy Materials, 2(10), 1246-1253. https://doi.org/10.1002/aenm.201200103
Chiechi, R. C., & Hummelen, J. C. (2012). Polymer Electronics, Quo Vadis? Acs Macro Letters, 1(10), 1180-1183. https://doi.org/10.1021/mz3004133

2011

Hong, W., Valkenier, H., Meszaros, G., Manrique, D. Z., Mishchenko, A., Putz, A., Garcia, P. M., Lambert, C. J., Hummelen, J. C., & Wandlowski, T. (2011). An MCBJ case study: The influence of π-conjugation on the single-molecule conductance at a solid/liquid interface. Beilstein Journal of Nanotechnology, 2(1), 699-713. https://doi.org/10.3762/bjnano.2.76
Guedon, C. M., Zonneveld, J., Valkenier, H., Hummelen, J. C., & van der Molen, S. J. (2011). Controlling the interparticle distance in a 2D molecule-nanoparticle network. Nanotechnology, 22(12), 125205-1-125205-5. Article 125205. https://doi.org/10.1088/0957-4484/22/12/125205
Dyakonov, V., Riedel, I., Deibel, C., Parisi, J., Brabec, C. J., Sariciftci, N. S., & Hummelen, J. C. (2011). Electronic properties of polymer-fullerene solar cells. MRS Online Proceedings Library, 665, 235-246. Article 71. https://doi.org/10.1557/proc-665-c7.1
Fracasso, D., Valkenier, H., Hummelen, J. C., Solomon, G. C., Chiechi, R. C., Hong, W., Mészáros, G., Zsolt Manrique, D., Mishchenko, A., Putz, A., Moreno García, P., Lambert, C. J., & Wandlowski, T. (2011). Evidence for quantum interference in sams of arylethynylene thiolates in tunneling junctions with eutectic Ga-In (EGaIn) top-contacts: The influence of π-conjugation on the single-molecule conductance at a solid/liquid interface. Journal of the American Chemical Society, 133(24), 9556-9563. https://doi.org/10.1021/ja202471m
Valkenier, H., Huisman, E. H., Hal, P. A. V., de Leeuw, D., Chiechi, R. C., & Hummelen, J. C. (2011). Formation of high-quality self-assembled monolayers of conjugated dithiols on gold: Base matters. Journal of the American Chemical Society, 133(13), 4930-4939. https://doi.org/10.1021/ja110358t
Ball, J. M., Bouwer, R. K. M., Kooistra, F. B., Frost, J. M., Qi, Y., Buchaca Domingo, E., Smith, J., de Leeuw, D. M., Hummelen, J. C., Nelson, J., Kahn, A., Stingelin, N., Bradley, D. D. C., & Anthopoulos, T. D. (2011). Soluble fullerene derivatives: The effect of electronic structure on transistor performance and air stability. Journal of Applied Physics, 110(1), 014506-1-014506-9. Article 014506. https://doi.org/10.1063/1.3605531
Brouwer, F., Alma, J., Valkenier, H., Voortman, T. P., Hillebrand, J., Chiechi, R. C., & Hummelen, J. C. (2011). Using bis(pinacolato)diboron to improve the quality of regioregular conjugated co-polymers. Journal of Materials Chemistry, 21(5), 1582-1592. https://doi.org/10.1039/c0jm02359k

2010

Koeber, S., Prauzner, J., Salvador, M., Kooistra, F. B., Hummelen, J. C., & Meerholz, K. (2010). 1064-nm Sensitive Organic Photorefractive Composites. Advanced materials, 22(12), 1383-+. https://doi.org/10.1002/adma.200903005
Bakulin, A. A., Hummelen, J. C., Loosdrecht, P. H. V., & Pshenichnikov, M. S. (2010). 30-fs Hole-Transfer Dynamics in Polymer/PCBM Bulk Heterojunction. In Conference Paper of the International Conference on Ultrafast Phenomena (UP) (pp. TuE47-TuE47). The Optical Society of America.
Karsten, B. P., Bouwer, R. K. M., Hummelen, J. C., Williams, R. M., & Janssen, R. A. J. (2010). Charge Separation and Recombination in Small Band Gap Oligomer-Fullerene Triads. Journal of Physical Chemistry B, 114(45), 14149-14156. https://doi.org/10.1021/jp906973d
Karsten, B. P., Bouwer, R. K. M., Hummelen, J. C., Williams, R. M., & Janssen, R. A. J. (2010). Charge separation and (triplet) recombination in diketopyrrolopyrrole-fullerene triads. Photochemical & Photobiological Sciences, 9(7), 1055-1065. https://doi.org/10.1039/c0pp00098a
Kuhlmann, J.-C., Bruyn, P. D., Bouwer, R. K. M., Meetsma, A., Blom, P. W. M., & Hummelen, J. C. (2010). Improving the compatibility of fullerene acceptors with fluorene-containing donor-polymers in organic photovoltaic devices. Chemical Communications, 46(38), 7232-7234. https://doi.org/10.1039/c0cc01347a
Koeber, S., Gallego-Gomez, F., Salvador, M., Kooistra, F. B., Hummelen, J. C., Aleman, K., Mansurova, S., & Meerholz, K. (2010). Influence of the sensitizer reduction potential on the sensitivity of photorefractive polymer composites. Journal of Materials Chemistry, 20(29), 6170-6175. https://doi.org/10.1039/c0jm01208d
Hummelen, J. C. (2010). Kunststoff-Solarzellen. Praxis der Naturwissenschaften, 59(2), 31-34.
Maddalena, F., Kuiper, M. J., Poolman, B., Brouwer, F., Hummelen, J. C., de Leeuw, D. M., de Boer, B., & Blom, P. W. M. (2010). Organic field-effect transistor-based biosensors functionalized with protein receptors. Journal of Applied Physics, 108(12), 124501-1-124501-4. Article 124501. https://doi.org/10.1063/1.3518681
Szendrei, K., Jarzab, D., Yarema, M., Sytnyk, M., Pichler, S., Hummelen, J. C., Heiss, W., & Loi, M. A. (2010). Surface modification of semiconductor nanocrystals by a methanofullerene carboxylic acid. Journal of Materials Chemistry, 20(39), 8470-8473. https://doi.org/10.1039/c0jm02347g
Bouwer, R. K. M., & Hummelen, J. C. (2010). The Use of Tethered Addends to Decrease the Number of Isomers of Bisadduct Analogues of PCBM. Chemistry, 16(37), 11250-11253. https://doi.org/10.1002/chem.201000537
Kooistra, F. B., Leuning, T. M., Martinez, E. M., & Hummelen, J. C. (2010). Two new types of pi-conjugation between a fullerene sphere and an addend. Chemical Communications, 46(12), 2097-2099. https://doi.org/10.1039/b920339g
Bakulin, A. A., Hummelen, J. C., Pshenichnikov, M. S., & Loosdrecht, P. H. M. V. (2010). Ultrafast Hole-Transfer Dynamics in Polymer/PCBM Bulk Heterojunctions. Advanced Functional Materials, 20(10), 1653-1660. https://doi.org/10.1002/adfm.200902099

2009

Jarzab, D., Cordella, F., Lenes, M., Kooistra, F. B., Blom, P. W. M., Hummelen, J. C., & Loi, M. A. (2009). Charge Transfer Dynamics in Polymer-Fullerene Blends for Efficient Solar Cells. Journal of Physical Chemistry B, 113(52), 16513-16517. https://doi.org/10.1021/jp907840z
Ball, J. M., Wöbkenberg, P. H., Kooistra, F. B., Hummelen, J. C., Leeuw, D. M. D., Bradley, D. D. C., & Anthopoulos, T. D. (2009). Complementary circuits based on solution processed low-voltage organic field-effect transistors. Synthetic Metals, 159(21-22), 2368-2370. https://doi.org/10.1016/j.synthmet.2009.08.019
Lenes, M., Shelton, S., Sieval, A., Kronholm, D. F., Hummelen, J. C., & Blom, P. W. M. (2009). Electron trapping in higher adduct fullerene-based solar cells. Advanced Functional Materials, 19(18), 3002-3007. https://doi.org/10.1002/adfm.200900459
Mikhnenko, O. V., Cordella, F., Sieval, A. B., Hummelen, J. C., Blom, P. W. M., & Loi, M. A. (2009). Exciton Quenching Close to Polymer-Vacuum Interface of Spin-Coated Films of Poly(p-phenylenevinylene) Derivative. Journal of Physical Chemistry B, 113(27), 9104-9109. https://doi.org/10.1021/jp9012637
Kronholm, D. F., & Hummelen, J. C. (2009). Fullerene-Based Acceptor Materials. In C. Brabec, V. Dyakonov, & U. Scherf (Eds.), Organic Photovoltaics (pp. 153-178).
Zoombelt, A. P., Fonrodona, M., Wienk, M. M., Sieval, A. B., Hummelen, J. C., & Janssen, R. A. J. (2009). Photovoltaic performance of an ultrasmall band gap polymer. Organic letters, 11(4), 903-906. https://doi.org/10.1021/ol802839z

2008

Lenes, M., Kooistra, F. B., Hummelen, J. C., Severen, I. V., Lutsen, L., Vanderzande, D., Cleij, T. J., & Blom, P. W. M. (2008). Charge dissociation in polymer: fullerene bulk heterojunction solar cells with enhanced permittivity. Journal of Applied Physics, 104(11), 114517-1-114517-4. Article 114517. https://doi.org/10.1063/1.3039191
Maddalena, F., Spijkman, M., Brondijk, J. J., Fonteijn, P., Brouwer, F., Hummelen, J. C., de Leeuw, D. M., Blom, P. W. M., & de Boer, B. (2008). Device characteristics of polymer dual-gate field-effect transistors. Organic Electronics, 9(5), 839-846. https://doi.org/10.1016/j.orgel.2008.06.004
Wobkenberg, P. H., Ball, J., Bradley, D. D. C., Anthopoulos, T. D., Kooistra, F., Hummelen, J. C., de Leeuw, D. M., & Wöbkenberg, P. H. (2008). Fluorine containing C(60) derivatives for high-performance electron transporting field-effect transistors and integrated circuits. Applied Physics Letters, 92(14), Article 143310. https://doi.org/10.1063/1.2907348
Lenes, M., Wetzelaer, G.-J. A. H., Kooistra, F. B., Veenstra, S., Hummelen, J. C., & Blom, P. W. M. (2008). Fullerene bisadducts for enhanced open-circuit voltages and efficiencies in polymer solar cells. Advanced materials, 20(11), 2116-2119. https://doi.org/10.1002/adma.200702438
Woebkenberg, P. H., Bradley, D. D. C., Kronholm, D., Hummelen, J. C., de Leeuw, D. M., Coelle, M., Anthopoulos, T. D., H. Wobkenberg, P., & Colle, M. (2008). High mobility n-channel organic field-effect transistors based on soluble C-60 and C-70 fullerene derivatives. Synthetic Metals, 158(11), 468-472. https://doi.org/10.1016/j.synthmet.2008.03.016
Macedo, A. G., Zanetti, F., Mikowski, A., Hummelen, J. C., Lepienski, C. M., da Luz, M. G. E., & Roman, L. S. (2008). Improving light harvesting in polymer photodetector devices through nanoindented metal mask films. Journal of Applied Physics, 104(3), 033714-1 - 033714-6. Article 033714. https://doi.org/10.1063/1.2968250
Woebkenberg, P. H., Ball, J., Kooistra, F. B., Hummelen, J. C., de Leeuw, D. M., Bradley, D. D. C., & Anthopoulos, T. D. (2008). Low-voltage organic transistors based on solution processed semiconductors and self-assembled monolayer gate dielectrics. Applied Physics Letters, 93(1), Article 013303. https://doi.org/10.1063/1.2954015
Kroon, R., Lenes, M., Hummelen, J. C., Blom, P. W. M., & Boer, B. D. (2008). Small bandgap polymers for organic solar cells (polymer material development in the last 5 years). Polymer Reviews, 48(3), 531-582. https://doi.org/10.1080/15583720802231833
Ball, J., Wobkenberg, P. H., Colleaux, F., Kooistra, F. B., Hummelen, J. C., Bradley, D. D. C., & Anthopoulos, T. D. (2008). Solution Processed Self-Assembled Monolayer Gate Dielectrics for Low-Voltage Organic Transistors. Materials Research Society proceedings, 1114, Article 3. https://doi.org/10.1557/PROC-1114-G09-02
Mikhnenko, O. V., Cordella, F., Sieval, A. B., Hummelen, J. C., Blom, P. W. M., & Loi, M. A. (2008). Temperature dependence of exciton diffusion in conjugated polymers. Journal of Physical Chemistry B, 112(37), 11601-11604. https://doi.org/10.1021/jp8042363

2007

Mandoc, M. M., Kooistra, F. B., Hummelen, J. C., de Boer, B., & Blom, P. W. M. (2007). Effect of traps on the performance of bulk heterojunction organic solar cells. Applied Physics Letters, 91(26), Article 263505. https://doi.org/10.1063/1.2821368
Hummelen, J. C. (2007). Fullerene derivatives and conjugated polymers. Polymer Preprints (American Chemical Society, Division of Polymer Chemistry), 48(1), 58.
Kooistra, F. B., Knol, J., Kastenberg, F., Popescu, L. M., Verhees, W. J. H., Kroon, J. M., & Hummelen, J. C. (2007). Increasing the open circuit voltage of bulk-heterojunction solar cells by raising the LUMO level of the acceptor. Organic letters, 9(4), 551-554. https://doi.org/10.1021/ol062666p
Köber, S., Gallego-Gomez, F., Salvador, M., Meerholz, K., Kooistra, F. B., Hummelen, J. C., Mielke, F., & Nuyken, O. (2007). Organic photorefractive polymers for coherence based imaging. In Photorefractive Effects, Photosensitivity, Fiber Gratings, Photonic Materials and More, PR 2007 (Optics InfoBase Conference Papers). Optical Society of America (OSA). https://doi.org/10.1364/pr.2007.tuc6

2006

Anthopoulos, T. D., Kooistra, F. B., Wondergem, H. J., Kronholm, D., Hummelen, J. C., & de Leeuw, D. M. (2006). Air-stable n-channel organic transistors based on a soluble C-84 fullerene derivative. Advanced materials, 18(13), 1679-1684. https://doi.org/10.1002/adma.200600068
Kooistra, FB., Mihailetchi, VD., Popescu, LM., Kronholm, D., Blom, PWM., Hummelen, JC., & Mihailetchi, V. D. (2006). New C-84 derivative and its application in a bulk heterojunction solar cell. Chemistry of Materials, 18(13), 3068-3073. https://doi.org/10.1021/cm052783z
Hadipour, A., de Boer, B., Wildeman, J., Kooistra, F., Hummelen, J. C., Turbiez, M. G. R., Wienk, M. M., Janssen, R. A. J., & Blom, P. W. M. (2006). Organic multi-junction solar cells processed from solution with sensitivity from ultraviolet to the near infrared - art. no. 61920D. In PL. Heremans, M. Muccini, & EA. Meulenkamp (Eds.), Organic Optoelectronics and Photonics II (PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE); Vol. 6192). SPIE - INT SOC OPTICAL ENGINEERING. https://doi.org/10.1117/12.664850
Mihailetchi, V. D., Xie, H., de Boer, B., Popescu, L. M., Hummelen, J. C., Blom, P. W. M., & Koster, L. J. A. (2006). Origin of the enhanced performance in poly(3-hexylthiophene): [6,6]-phenyl C-61-butyric acid methyl ester solar cells upon slow drying of the active layer. Applied Physics Letters, 89(1), Article 012107. https://doi.org/10.1063/1.2212058
Koster, L. J. A., Mihailetchi, V. D., Hummelen, J. C., & Blom, P. W. M. (2006). Performance enhancement of poly(3-hexylthiophene):methanofullerene bulk-heterojunction solar cells. Section Title: Electrochemical, Radiational, and Thermal Energy Technology. Proceedings of SPIE-The International Society for Optical Engineering, 6334(Organic Photovoltaics VII), 633409/1-633409/11.
Hadipour, A., Boer, B. D., Wildeman, J., Kooistra, F. B., Hummelen, J. C., Turbiez, M. G. R., Wienk, M. M., Janssen, R. A. J., & Blom, P. W. M. (2006). Solution-processed organic tandem solar cells. Advanced Functional Materials, 16(14), 1897-1903. https://doi.org/10.1002/adfm.200600138
Van Dijk, E. H., Myles, D. J. T., Van Der Veen, M. H., & Hummelen, J. C. (2006). Synthesis and properties of an anthraquinone-based redox switch for molecular electronics. Organic letters, 8(11), 2333-2336. https://doi.org/10.1021/ol0606278
Popescu, L. M., van ’t Hof, P., Sieval, A. B., Jonkman, H. T., & Hummelen, J. C. (2006). Thienyl analog of 1-(3-methoxycarbonyl)propyl-1-phenyl-[6,6]-methanofullerene for bulk heterojunction photovoltaic devices in combination with polythiophenes. Applied Physics Letters, 89(21), 213507-1 - 213507-3. Article 213507. https://doi.org/10.1063/1.2397003

2005

Markov, D. E., Amsterdam, E., Blom, P. W. M., Sieval, A. B., & Hummelen, J. C. (2005). Accurate measurement of the exciton diffusion length in a conjugated polymer using a heterostructure with a side-chain cross-linked fullerene layer. The Journal of Physical Chemistry A, 109(24), 5266-5274. https://doi.org/10.1021/jp0509663
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