文献类型：期刊文献

英文题名：Efficient quantum dot sensitized solar cells via improved loading amount management

作者：Wang, Wei[1]; Xie, Yiling[1]; He, Fangfang[1]; Wang, Yuan[1]; Xue, Weinan[1]; Li, Yan[1]

机构：[1] Key Laboratory for Advanced Materials, Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2023

卷号：8

期号：1

起止页码：213

外文期刊名：Green Energy and Environment

收录：EI(收录号：20211710241902)

语种：英文

外文关键词：Cadmium compounds - Cationic surfactants - Charge transfer - Deposition - Dyes - II-VI semiconductors - Loading - Nanocrystals - Quantum efficiency - Selenium compounds - Semiconductor quantum dots - Solar cells

摘要：High light-harvesting efficiency and low interfacial charge transfer loss are essential for the fabrication of high-efficiency quantum dot-based solar cells (QDSCs). Increasing the thickness of mesoporous TiO2 films can improve the loading of pre-synthesized QDs on the film and enhance the absorbance of photoanode, but commonly accompanied by the increase in the unfavorable charge recombination due to prolonged electron transmission paths. Herein, we systematically studied the influence of the balance between QD loading and TiO2 film thickness on the performance of QDSCs. It is found that the relative thin photoanode prepared by the cationic surfactant-assisted multiple deposition procedure has achieved a high QD loading which is comparable to that of the thick photoanode commonly used. Under AM 1.5G illumination, Zn–Cu–In–Se and Zn–Cu–In–S based QDSCs with optimized 11.8 μm photoanodes show the PCE of 10.03% and 8.53%, respectively, which are comparable to the corresponding highest PCE of Zn–Cu–In–Se and Zn–Cu–In–S QDSCs (9.74% and 8.75%) with over 25.0 μm photoanodes. Similarly, an impressive PCE of 6.14% was obtained for the CdSe based QDSCs with a 4.1 μm photoanode, which is slightly lower than the best PCE (7.05%) of reference CdSe QDSCs with 18.1 μm photoanode. ? 2021 Institute of Process Engineering, Chinese Academy of Sciences