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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='text-align:center'><img width=635 height=79 id="Picture_x0020_1" src="cid:image001.jpg@01CF549F.813633A0" alt="Tertiary_Electrical_color.jpg"><b><span style='font-size:13.0pt'><o:p></o:p></span></b></p><p class=MsoNormal align=center style='text-align:center'><b><span style='font-size:13.0pt'><o:p> </o:p></span></b></p><p class=MsoNormal align=center style='text-align:center'><b><span style='font-size:13.0pt'>Monday, April 14, 2014 – 11 AM<o:p></o:p></span></b></p><p class=MsoNormal align=center style='text-align:center'><b><span style='font-size:13.0pt'>N355-D<o:p></o:p></span></b></p><p class=MsoNormal align=center style='text-align:center'><b><span style='font-size:16.0pt;font-variant:small-caps'>Nanostructures for photovoltaic solar cells and flexible transparent electrodes<o:p></o:p></span></b></p><p class=MsoNormal align=center style='text-align:center'><span style='font-size:14.0pt'><o:p> </o:p></span></p><p class=MsoNormal align=center style='text-align:center'><span style='font-size:14.0pt'>Zhifeng Ren<o:p></o:p></span></p><p class=MsoNormal align=center style='text-align:center'><span style='font-size:14.0pt'>Department of Physics and TcSUH, University of Houston, Houston, Texas </span><o:p></o:p></p><p class=MsoNormal style='text-align:justify;line-height:150%'><o:p> </o:p></p><p class=MsoNormal style='text-align:justify'><b><i>Abstract:</i></b> Photovoltaic technology converting solar energy into electricity is playing a more and more important role in providing the society with clean energy and reducing the impact of burning fossil fuels on environment. How to increase the photovoltaic conversion efficiency has been studied very intensively during the past couple of decades. In this talk, I will present our effort using nanostructures to potentially improve the conversion efficiency by both designing new structures and inventing new transparent electrodes, specifically I will discuss our development on nano coaxial cable solar cells to separate the photon and charge path ways, ultra thin film solar cells for efficient light absorption, and super flexible transparent electrodes for efficient collection of charges. <o:p></o:p></p><div style='mso-element:para-border-div;border:none;border-bottom:solid windowtext 1.5pt;padding:0in 0in 1.0pt 0in'><p class=MsoNormal style='text-align:justify;border:none;padding:0in'><o:p> </o:p></p></div><p class=MsoNormal style='text-align:justify'><!--[if gte vml 1]><v:shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f">
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</v:shape><![endif]--><![if !vml]><img width=171 height=239 src="cid:image003.jpg@01CF549F.813633A0" align=left hspace=12 alt="Zhifeng Ren at UH" v:shapes="Picture_x0020_2"><![endif]><span style='font-size:10.0pt'>Dr. Zhifeng Ren</span><span style='font-size:10.0pt'> is currently </span><span style='font-size:10.0pt'>an M. D. Anderson Chair Professor in the Department of Physics and TcSUH of the University of Houston</span><span style='font-size:10.0pt'>. He obtained PhD degree from the Institute of Physics of Chinese Academy of Sciences in 1990. His expertise is </span><span style='font-size:10.0pt'>in </span><span style='font-size:10.0pt'>materials synthesis and applications including superconductors, carbon nanotubes, ZnO nanowires, thermoelectric materials, photovoltaic materials, nano-bio materials and sensors, etc. Recently, he has focused on nanostructured </span><span style='font-size:10.0pt'>thermoelectric</span><span style='font-size:10.0pt'> </span><span style='font-size:10.0pt'>materials, </span><span style='font-size:10.0pt'>devices, and systems for efficient energy conversion using the enhanced thermoelectric materials he and his co-workers developed. He</span><span style='font-size:10.0pt'> </span><span style='font-size:10.0pt'>is a fellow of APS and a fellow of AAA</span><span style='font-size:10.0pt'>S. He is the recipient of the 2014 Edith and Peter O’Donnell Award in Science from The Academy of Medicine, Engineering & Science of Texas (TAMEST). He is an elected fellow of the National Academy of Inventors.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p></div></body></html>