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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal align=center style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center;text-autospace:none'><span style='font-size:10.0pt'>***** Seminar *****</span><o:p></o:p></p><p class=MsoNormal align=center style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center;text-autospace:none'><b><span style='font-size:10.0pt'>Center for Integrated Bio and Nano Systems</span></b><o:p></o:p></p><p class=MsoNormal align=center style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center;text-autospace:none'><b><span style='font-size:10.0pt'>Houston Chapter of IEEE Nanotechnology Council and Houston Chapter of IEEE Magnetics Society</span></b><o:p></o:p></p><p class=MsoNormal align=center style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center;text-autospace:none'><b><span style='font-size:10.0pt'> </span></b><o:p></o:p></p><p class=MsoNormal align=center style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center;text-autospace:none'><span style='font-size:10.0pt'>Friday, October 4, 2013</span><o:p></o:p></p><p class=MsoNormal align=center style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center;text-autospace:none'><span style='font-size:10.0pt'>12:30 p.m. (Refreshments served at noon)</span><o:p></o:p></p><p class=MsoNormal align=center style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center;text-autospace:none'><span style='font-size:10.0pt'>Room: W122 Building D3</span><o:p></o:p></p><p class=MsoNormal align=center style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center;text-autospace:none'><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'> </span><o:p></o:p></p><p class=MsoNormal align=center style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center;text-autospace:none'><b><span style='font-size:18.0pt'>Design of Conjugated Polymers for the Applications in Efficient Polymer Solar Cells </span></b><o:p></o:p></p><p class=MsoNormal align=center style='text-align:center'><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'> </span><o:p></o:p></p><p class=MsoNormal align=center style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center;text-autospace:none'><span style='font-size:16.0pt'>Jianhui Hou</span><o:p></o:p></p><p class=MsoNormal align=center style='text-align:center'><span style='font-size:10.0pt'> </span><o:p></o:p></p><p class=MsoNormal align=center style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center;text-autospace:none'><i>State Key Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (ICCAS)</i><o:p></o:p></p><p class=MsoNormal align=center style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:center;text-autospace:none'><i> </i><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:justify;text-autospace:none'><span style='font-size:10.0pt'>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.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:6.0pt;margin-right:0in;margin-bottom:2.0pt;margin-left:.25in;mso-margin-top-alt:.5gd;mso-para-margin-right:0in;mso-para-margin-bottom:2.0pt;mso-para-margin-left:.25in;text-indent:-.25in;line-height:11.0pt;mso-line-height-rule:exactly'><span style='font-size:8.0pt'>10 Representative Publications Related to the Presentation</span><o:p></o:p></p><p class=default style='margin-left:.25in;text-align:justify;text-indent:-.25in'><span style='font-size:8.0pt'>1.</span><span style='font-size:7.0pt'> </span><span style='font-size:8.0pt'>L. Huo, S. Zhang, X. Guo, F. Xu, Y. Li,* J. Hou,* <i>Angew. Chem. Int. Ed.</i> <b>2012</b>, <i>50</i>, 9697-9702.</span><span style='font-size:8.0pt'> </span><o:p></o:p></p><p class=default style='margin-left:.25in;text-align:justify;text-indent:-.25in'><span style='font-size:8.0pt'>2.</span><span style='font-size:7.0pt'> </span><span style='font-size:8.0pt'>Y. Huang, X. Guo, L. Feng, L. Huo, Y. Chen, T. P. Russell,* C. C. Han, Y. Li,* J. Hou,* <i>Adv. Mater. </i><b>2012</b>, <i>24</i>, 3383-3389.</span><o:p></o:p></p><p class=default style='margin-left:.25in;text-align:justify;text-indent:-.25in'><span style='font-size:8.0pt'>3.</span><span style='font-size:7.0pt'> </span><span style='font-size:8.0pt'>D. Qian, W. Ma,* Z. Li, X. Guo, S. Zhang, L. Ye, H. Ade, Z. Tan,* J. Hou,*<i> J. Am. Chem. Soc.</i> <b>2013</b>,</span><b><span style='font-size:8.0pt;color:#002060'> </span></b><b><span lang=DE style='font-size:8.0pt'>135, </span></b><span lang=DE style='font-size:8.0pt'>8464-8467.</span><o:p></o:p></p><p class=default style='margin-left:.25in;text-align:justify;text-indent:-.25in'><span style='font-size:8.0pt'>4.</span><span style='font-size:7.0pt'> </span><span lang=DE style='font-size:8.0pt'>L. Ye, Y. Jing, X. Guo, H. Sun, S. Zhang, M. Zhang, L. Huo, J. Hou,* </span><i><span lang=DE style='font-size:8.0pt'>J. Phys. Chem. C</span></i><span lang=DE style='font-size:8.0pt'>, <b>2013, </b><i>117</i><b>, </b>14920-14928.</span><o:p></o:p></p><p class=default style='margin-left:.25in;text-align:justify;text-indent:-.25in'><span style='font-size:8.0pt'>5.</span><span style='font-size:7.0pt'> </span><span style='font-size:8.0pt'>Y. Wu, Z. Li, W. Ma,* Y. Huang, L. Huo,*, X. Guo, M. Zhang, H. Ade, J. Hou,* <i>Adv. Mater.</i> <b>2013</b>, <i>25</i>, 3449-3455.</span><o:p></o:p></p><p class=default style='margin-left:.25in;text-align:justify;text-indent:-.25in'><span style='font-size:8.0pt'>6.</span><span style='font-size:7.0pt'> </span><span style='font-size:8.0pt'>X. Guo, M. Zhang, J. Tan, S. Zhang, L. Huo, W. Hu,* Y. Li*, J. Hou,* <i>Adv. Mater.</i> <b>2012</b>, <i>24</i>, 6536-6541.</span><o:p></o:p></p><p class=default style='margin-left:.25in;text-align:justify;text-indent:-.25in'><span style='font-size:8.0pt'>7.</span><span style='font-size:7.0pt'> </span><span style='font-size:8.0pt'>H. Chen, J. Hou*, S. Zhang, Y. Liang, G. Yang, Y. Yang, L. Yu, Y. Wu*, G. Li, , <i>Nat. Photonics</i>, <b>2009</b>, <i>3</i>, 649-653.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in;text-align:justify;text-indent:-.25in'><span style='font-size:8.0pt'>8.</span><span style='font-size:7.0pt'> </span><span style='font-size:8.0pt'>Y. Wu, Z. Li, W. Ma,* Y. Huang, L. Huo,* X. Guo, M. Zhang, H. Ade, J. Hou,* <i>Adv. Mater. </i><b>2013,</b> <i>25</i> (25), 3449-3455.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in;text-indent:-.25in;text-autospace:none'><span style='font-size:8.0pt'>9.</span><span style='font-size:7.0pt'> </span><span style='font-size:8.0pt'>M. Zhang, Y. Gu, X. Guo, F. Liu, S. Zhang, L. Huo, T. P. Russell,* J. Hou,* <i>Adv. Mater. </i><b>2013</b>, <i>25 </i>(35), 4944–4949.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:.25in;text-indent:-.25in;text-autospace:none'><span style='font-size:8.0pt'>10.</span><span style='font-size:7.0pt'> </span><span style='font-size:8.0pt'>J. Hou,* M. H. Park, S. Zhang, Y. Yao, L. M. Chen, J. H. Li, Y. Yang,* <i>Macromolecules</i> <b>2008</b>, <i>41 (16)</i>, 6012-6018.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:justify'><span style='font-size:10.0pt'> </span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:justify;text-autospace:none'><b><span style='font-size:10.0pt'>Bio of Dr. Hou: </span></b><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:justify;text-autospace:none'><span style='font-size:10.0pt'>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.</span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:10.0pt'> </span></b><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:justify;text-autospace:none'><span style='font-size:10.0pt;font-family:"Calibri","sans-serif"'>Contact Prof. Yan Yao (<u><a href="mailto:yyao4@uh.edu">yyao4@uh.edu</a></u>) if you would like to arrange for a time to meet with Prof. Hou.</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p></div></body></html>