学术报告
高分子科学系列讲座189讲：Dr. Qiquan Qiao，Polymer Nanopatterning and Polymer Optoelectronics
文章来源： 发布时间：2014-07-10
| 报告题目：Polymer Nanopatterning and Polymer Optoelectronics(No. PSLAB189-PS2014-07) |
| 报 告 人：Dr.Qiquan Qiao |
| 单 位：South Dakota State University, USA |
| 报告时间：2014年7月11日（星期五）上午9:30 |
| 报告地点：主楼四楼学术报告厅（410室） |
| 报告内容摘要： The presentation will focus on the development of cost effective solar cells including dye-sensitized solar cells (DSCs) and polymer solar cells (PSCs) that are currently be conducted in Qiao group. In dye-sensitized solar cells, carbon nanofibers are used as a low cost alternative to Pt counter electrode and achieved comparable cell performance at a lower cost. Also TiO2 nanofiber/nanoparticle composite is used as an innovative photoanode for high efficiency DSCs. The introduction of TiO2 nanofibers into the photoanode increased light absorption by forward light scattering and improved charge transport efficiency due to highly crystalline grains with fewer grain boundaries in TiO2 nanofibers. In polymer solar cells, current cell efficiency is still low for commercial applications. Part of the major issues in polymer solar cells is inefficient charge transport and recombination. I will discuss the engineering of active layer nanomorphology for improved charge transport in polymer solar cells via various acceptor loadings and solvent additives. Effects of PCBM weight ratios on the optical and electrical characteristics of bulk heterojunction 2,1,3-Benzothiadiazole based polymer namely PBT-T1:PCBM film were investigated and correlated with changes to nanomorphology. Increasing PCBM loading in active layer blends led to more amorphous polymer chains with smaller domain sizes. Addition of small amounts of additive DIO in parent solvent for the 1:2 mixing ratio led to enhanced photovoltaic performance due to reduction in series resistance, larger shunt resistant and higher charge carrier mobility caused by improved crystallinity of the polymer. Photo-CELIV and transient measurements have been conducted to study the morphology in polymer solar cells. |
| 报告人介绍 | Dr.Qiquan Qiao |
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| Dr. Qiquan Qiao is an associate professor in Electrical Engineering at South Dakota State University (SDSU). Current research focuses on polymer photovoltaic, dye-sensitized solar cell and lithium ion battery materials and devices. Dr Qiao has published more than 60 peer reviewed papers in leading journals including Journal of the American Chemical Society, Advanced Functional Materials, Energy and Environmental Science, Nanoscale, etc. In addition to his recent receipt of the 2014 F O Butler Award for Excellence in Research at SDSU, he also received 2012 3M Faculty Award and College of Engineering Young Investigator Award. In 2010, Dr. Qiao was granted an Early Career Award from the US National Science Foundation, and in 2009 he received the Bergmann Memorial Award from the US-Israel Bi-national Science Foundation. During his graduate study, Dr. Qiao received the 2006 American Society of Mechanical Engineers Solar Energy Division Graduate Student Research Award and the 2006 Chinese Government Award for Outstanding Students Abroad. |
