文献类型：期刊文献

英文题名：Carbon Counter-Electrode-Based Quantum-Dot-Sensitized Solar Cells with Certified Efficiency Exceeding 11%

作者：Du, Zhonglin[1];Pan, Zhenxiao[1];Fabregat-Santiago, Francisco[2];Zhao, Ke[1];Long, Donghui[3];Zhang, Hua[1];Zhao, Yixin[4];Zhong, Xinhua[1];Yu, Jong-Sung[5];Bisquert, Juan[2,6]

机构：[1]East China Univ Sci & Technol, Inst Appl Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Univ Jaume 1, Inst Adv Mat INAM, Castellon de La Plana 12006, Spain;[3]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[4]Shanghai Jiao Tong Univ, Sch Environm Engn, Shanghai 200240, Peoples R China;[5]DGIST, Dept Energy Syst Engn, Daegu 42988, South Korea;[6]King Abdulaziz Univ, Dept Chem, Jeddah, Saudi Arabia

年份：2016

卷号：7

期号：16

起止页码：3103

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY LETTERS

收录：;EI(收录号：20163502741296);WOS:【SCI-EXPANDED(收录号:WOS:000381781800007)】；

基金：This work is supported by the Natural Science Foundation of China (Nos. 91433106, 21421004), the Programme of Introducing Talents of Discipline to Universities (B16017), the Fundamental Research Funds for the Central Universities in China, and the global frontier R&D program on center for multiscale energy system (NRF 2011-0031571) in Korea. The work at INAM-UJI was supported by Generalitat Valenciana project PROMETEO/2014/020.

语种：英文

外文关键词：Nanocrystals - Efficiency - II-VI semiconductors - Semiconductor quantum dots - Carbon films - Polysulfides - Redox reactions - Tellurium compounds - Cadmium compounds - Electrodes - Polyelectrolytes - Solar cells - Catalyst activity - Mesh generation

摘要：The mean power conversion efficiency (PCE) of quantum-dot-sensitized solar cells (QDSCs) is mainly limited by the low photovoltage and fill factor (FF), which are derived from the high redox potential of polysulfide electrolyte and the poor catalytic activity of the counter electrode (CE), respectively. Herein, we report that this problem is overcome by adopting Ti mesh supported mesoporous carbon (MC/Ti) CE. The confined area in Ti mesh substrate not only offers robust carbon film with submillimeter thickness to ensure high catalytic capacity, but also provides an efficient three dimension electrical tunnel with better conductivity than state-of-art Cu2S/FTO CE. More importantly, the MC/Ti CE can down shift the redox potential of polysulfide electrolyte to promote high photovoltage. In all, MC/Ti CEs boost PCE of CdSe0.65Te0.35 QDSCs to a certified record of 11.16% (J(sc) = 20.68 mA/cm(2), V-oc = 0.798 V, FF = 0.677), an improvement of 24% related to previous record. This work thus paves a way for further improvement of performance of QDSCs.