文献类型：期刊文献

英文题名：Porphyrin Cosensitization for a Photovoltaic Efficiency of 11.5%: A Record for Non-Ruthenium Solar Cells Based on Iodine Electrolyte

作者：Xie, Yongshu;Tang, Yunyu;Wu, Wenjun;Wang, Yueqiang;Liu, Jingchuan;Li, Xin;Tian, He;Zhu, Wei-Hong[1]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China

年份：2015

卷号：137

期号：44

起止页码：14055

外文期刊名：JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

收录：;EI(收录号：20154701590253);WOS:【SCI-EXPANDED(收录号:WOS:000364727600014)】；

基金：This work was supported by the Science Fund for Creative Research Groups (21421004), Distinguished Young Scholars (21325625), NSFC/China (21472047, 91227201), and the Oriental Scholarship

语种：英文

外文关键词：Electrolytes - Porphyrins - Solar power generation - Iodine - Ruthenium - Solar energy

摘要：Dye-sensitized solar cells (DSSCs) are promising for utilizing solar energy. To achieve high efficiencies, it is vital to synergistically improve the photocurrent (J(sc)) and the photovoltage (V-oc). In this respect, conjugation framework extension and cosensitization are effective for improving the absorption and the J(sc), which, however, is usually accompanied by undesirably decreased V-oc. Herein, based on a rationally optimized porphyrin dye, we develop a targeted coadsorption/cosensitization approach for systematically improving the V-oc from 645 to 727, 746, and 760 mV, with synergistical J(sc) enhancement from 18.83 to 20.33 mA cm(-2). Thus, the efficiency has been dramatically enhanced to 11.5%, which keeps the record for nonruthenium DSSCs using the I-2/I-3(-) electrolyte. These results compose an alternative approach for developing highly efficient DSSCs with relatively high V-oc using traditional iodine electrolyte.