文献类型：期刊文献

英文题名：Cosensitized Quantum Dot Solar Cells with Conversion Efficiency over 12%

作者：Wang, Wei[1];Feng, Wenliang[1];Du, Jun[1];Xue, Weinan[1];Zhang, Linlin[1];Zhao, Leilei[1];Li, Yan[1];Zhong, Xinhua[2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[2]South China Agr Univ, Coll Mat & Energy, Guangzhou 510642, Guangdong, Peoples R China

年份：2018

卷号：30

期号：11

外文期刊名：ADVANCED MATERIALS

收录：;EI(收录号：20180404676321);WOS:【SCI-EXPANDED(收录号:WOS:000427111300015)】；

基金：This research is supported by National Natural Science Foundation of China (Grant 21771063), the Science Fund for Creative Research Groups (Grant 21421004), the State Key Research Development Program of China (Grant 2016YFA0204200), and the Fundamental Research Funds for the Central Universities in China (Grants. WJ1714046 and 222201717003).

语种：英文

外文关键词：cosensitized photoanodes; high-efficiency solar cells; quantum dot solar cells

摘要：The improvement of sunlight utilization is a fundamental approach for the construction of high-efficiency quantum-dot-based solar cells (QDSCs). To boost light harvesting, cosensitized photoanodes are fabricated in this work by a sequential deposition of presynthesized Zn-Cu-In-Se (ZCISe) and CdSe quantum dots (QDs) on mesoporous TiO2 films via the control of the interactions between QDs and TiO2 films using 3-mercaptopropionic acid bifunctional linkers. By the synergistic effect of ZCISe-alloyed QDs with a wide light absorption range and CdSe QDs with a high extinction coefficient, the incident photon-to-electron conversion efficiency is significantly improved over single QD-based QDSCs. It is found that the performance of cosensitized photoanodes can be optimized by adjusting the size of CdSe QDs introduced. In combination with titanium mesh supported mesoporous carbon as a counterelectrode and a modified polysulfide solution as an electrolyte, a champion power conversion efficiency up to 12.75% (V-oc = 0.752 V, J(sc) = 27.39 mA cm(-2), FF = 0.619) is achieved, which is, as far as it is known, the highest efficiency for liquid-junction QD-based solar cells reported.