文献类型：期刊文献

英文题名：High-Efficiency "Green" Quantum Dot Solar Cells

作者：Pan, Zhenxiao[1];Mora-Sero, Ivan[2];Shen, Qing[3,4];Zhang, Hua[1];Li, Yan[1];Zhao, Ke[1];Wang, Jin[1];Zhong, Xinhua[1];Bisquert, Juan[2,5]

机构：[1]E China Univ Sci & Technol, Inst Appl Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Univ Jaume 1, Dept Fis, Photovolta & Optoelect Devices Grp, Castellon de La Plana 12071, Spain;[3]Univ Electrocommun, Dept Engn Sci, Chofu, Tokyo 1828585, Japan;[4]Japan Sci & Technol Agcy JST, CREST, Kawaguchi, Saitama 3320012, Japan;[5]King Abdulaziz Univ, Fac Sci, Dept Chem, Jeddah, Saudi Arabia

年份：2014

卷号：136

期号：25

起止页码：9203

外文期刊名：JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

收录：;EI(收录号：20142717893372);WOS:【SCI-EXPANDED(收录号:WOS:000338184200053)】；

基金：We acknowledge the National Natural Science Foundation of China (Nos. 21175043, 21301059), the Science and Technology Commission of Shanghai Municipality (11JC1403100, 12NM0504101, 12ZR1407700), and the Fundamental Research Funds for the Central Universities for financial support.

语种：英文

外文关键词：Toxic materials - Cadmium - Indium compounds - Solar cells - Chalcogenides - Copper compounds - Quantum efficiency - Nanocrystals - Zinc compounds - Lead compounds - Solar power generation - Passivation

摘要：Semiconductor quantum dots (QDs) are extremely interesting materials for the development of photovoltaic devices, but currently the present the drawback is that the most efficient devices have been prepared with toxic heavy metals of Cd or Pb. Solar cells based on "green" QDs-totally free of Cd or Pb-present a modest efficiency of 2.52%. Herein we achieve effective surface passivation of the ternary CuInS2 (CIS) QDs that provides high photovoltaic quality core/shell CIS/ZnS (CIS-Z) QDs, leading to the development of high-efficiency green QD solar cells that surpass the performance of those based on the toxic cadmium and lead chalcogenides QDs. Using wide absorption range QDs, CIS-Z-based quantum dot sensitized solar cell (QDSC) configuration with high QD loading and with the benefit of the recombination reduction with type-I core/shell structure, we boost the power conversion efficiency of Cd- and Pb-free QDSC to a record of 7.04% (with certified efficiency of 6.66%) under AM 1.5G one sun irradiation. This efficiency is the best performance to date for QDSCs and also demonstrates that it is possible to obtain comparable or even better photovoltaic performance from green CIS QDs to the toxic cadmium and lead chalcogenides QDs.