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"Design of Conjugated Polymers for the Applications in Efficient Polymer Solar Cells" by Jianhui Hou

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October 4, 2013 - 12:00pm - 1:30pm
W122 Engineering Building D3, University of Houston

Center for Integrated Bio and Nano Systems, Houston Chapter of IEEE Nanotechnology Council and Houston Chapter of IEEE Magnetics Society
Friday, October 4, 2013
12:30 p.m. (Refreshments served at noon)
Room: W122 Building D3

Design of Conjugated Polymers for the Applications in Efficient Polymer Solar Cells  

Jianhui Hou
State Key Laboratory of Polymer Physics and Chemistry,
Beijing National Laboratory for Molecular Sciences,
Institute of Chemistry, Chinese Academy of Sciences (ICCAS)

Polymer solar cell (PSC) has attracted much attention due to its potential application in production of large area, light weight and flexible devices. In order to improve power conversion efficiency (PCE) of PSC, more and more new materials were designed and synthesized and their properties, like molecular energy levels and band gaps, can be tuned effectively. In these new materials, benzo[1,2-b:4,5-b’]dithiophene (BDT) based conjugated polymers exhibited very promising photovoltaic properties.  In our recent study, photovoltaic properties of BDT-based conjugated polymers were tuned through molecular structure design. Functional groups or conjugated components with strong electron-withdrawing effect were introduced into the BDT-based polymers, and HOMO levels of the BDT-based polymers can be lowered effectively without sacrificing absorption area and hole mobility. Therefore, higher open circuit voltage (Voc), good short circuit voltage (Jsc) and fill factor (FF) were recorded, and hence ~9% PCE can be realized. In this presentation, a few useful design strategies of photovoltaic polymers will be introduced and also the correlation among polymer structure, morphology and photovoltaic properties will be discussed in detail.

10 Representative Publications Related to the Presentation

1.      L. Huo, S. Zhang, X. Guo, F. Xu, Y. Li,* J. Hou,* Angew. Chem. Int. Ed. 2012, 50, 9697-9702.
2.      Y. Huang, X. Guo, L. Feng, L. Huo, Y. Chen, T. P. Russell,* C. C. Han, Y. Li,* J. Hou,* Adv. Mater. 2012, 24, 3383-3389.
3.      D. Qian, W. Ma,* Z. Li, X. Guo, S. Zhang, L. Ye, H. Ade, Z. Tan,* J. Hou,* J. Am. Chem. Soc. 2013, 135, 8464-8467.
4.      L. Ye, Y. Jing, X. Guo, H. Sun, S. Zhang, M. Zhang, L. Huo, J. Hou,* J. Phys. Chem. C, 2013, 117, 14920-14928.
5.      Y. Wu, Z. Li, W. Ma,* Y. Huang, L. Huo,*, X. Guo, M. Zhang, H. Ade, J. Hou,* Adv. Mater. 2013, 25, 3449-3455.
6.      X. Guo, M. Zhang, J. Tan, S. Zhang, L. Huo, W. Hu,* Y. Li*, J. Hou,* Adv. Mater. 2012, 24, 6536-6541.
7.      H. Chen, J. Hou*, S. Zhang, Y. Liang, G. Yang, Y. Yang, L. Yu, Y. Wu*, G. Li, , Nat. Photonics, 2009, 3, 649-653.
8.      Y. Wu, Z. Li, W. Ma,* Y. Huang, L. Huo,* X. Guo, M. Zhang, H. Ade, J. Hou,* Adv. Mater. 2013, 25 (25), 3449-3455.
9.      M. Zhang, Y. Gu, X. Guo, F. Liu, S. Zhang, L. Huo, T. P. Russell,* J. Hou,* Adv. Mater. 2013, 25 (35), 4944–4949.
10.    J. Hou,* M. H. Park, S. Zhang, Y. Yao, L. M. Chen, J. H. Li, Y. Yang,* Macromolecules 2008, 41 (16), 6012-6018.

Bio of  Dr.  Hou:
Dr. Jianhui Hou got his Ph. D. from Institute of Chemistry, Chinese Academy of Sciences, China in 2006. He worked as a postdoc at UCLA from 2006-2008 and then Director of Research of Solarmer Energy Inc. from 2008-2010. He is currently a Professor in the Institute of Chemistry, Chinese Academy of Sciences. Dr. Hou’s research focuses on organic photovoltaic materials. Two of his major interests: (a) Design and synthesis of new conjugated polymers towards the applications in highly efficient polymer solar cells; (b) Improving photovoltaic performance of polymer solar cells by morphology control. He has co-authored >70 papers in peer-reviewed journals and published 12 patents, and these works have been cited more than 6000 times in the past five years.

Contact Prof. Yan Yao (yyao4 [at] uh [dot] edu) if you would like to arrange for a time to meet with Prof. Hou.