文献类型：期刊文献

英文题名：Near Infrared Absorption of CdSexTe1-x, Alloyed Quantum Dot Sensitized Solar Cells with More than 6% Efficiency and High Stability

作者：Pan, Zhenxiao[1];Zhao, Ke[1];Wang, Jin[1];Zhang, Hua[1];Feng, Yaoyu[1];Zhong, Xinhua[1]

机构：[1]E China Univ Sci & Technol, Inst Appl Chem, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China

年份：2013

卷号：7

期号：6

起止页码：5215

外文期刊名：ACS NANO

收录：;EI(收录号：20132816478524);WOS:【SCI-EXPANDED(收录号:WOS:000321093800057)】；

基金：This work has been financially supported by National Natural Science Foundation of China (No. 21175043), the Science and Technology Commission of Shanghai Municipality (11JC1403100, 12ZR1407700), the National Special Fund for State Key Laboratory of Bioreactor Engineering (No. 2060204), and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：CdSexTe1-x; alloyed quantum dots; solar cells; high efficiency

摘要：CdSe0.45Te0.55 alloyed quantum dots (QDs) with excitonic absorption onset at 800 nm and particle size of 5.2 nm were prepared via a noninjection high-temperature pyrolysis route and used as a sensitizer in solar cells. A postsynthesis assembly approach with use of bifunctional linker molecule mercaptopropionic acid (MPA) capped water-soluble QDs, obtained via ex situ ligand exchange from the initial oil-dispersible QDs, was adopted for tethering QDs onto mesoporous TiO2 film. With the combination of high loading of the QD sensitizer and intrinsic superior optoelectronic properties (wide absorption range, high conduction band edge, high chemical stability, etc., relative to their constituents CdSe and Cdte) of the adopted CdSe0.45Te0.35 QD sensitizer, the resulting CdSexTe1-x, alloyed QD-based solar cells exhibit a record conversion efficiency of 636% (/J(sc) = 1935 mA/cm(2), V-oc = 0.571 V. FF = 0375) under full 1 sun illumination, which is remarkably better than that of the reference CdSe and CdTe OD based ones. Furthermore, the solar cells with Cu2S counter electrodes based on eletrodeposition of Cu on conductive glass show long-term (more than 500 h) stability.