Efficient PbS quantum dots tandem solar cells through compatible interconnection layer  

作　　者：Gomaa Mohamed Gomaa Khalaf Xinzhao Zhao Mingyu Li Chunxia Li Salman Ali Tianjun Ma Hsien-Yi Hsu Jianbin Zhang Haisheng Song 

机构地区：[1]Wuhan National Laboratory for Optoelectronics(WNLO),Huazhong University of Science and Technology(HUST),Wuhan 430074,Hubei,China [2]Solar and Space Department,National Research Institute of Astronomy and Geophysics(NRIAG),Helwan,Cairo,Egypt [3]School of Energy and Environment&Department of Materials Science and Engineering,City University of Hong Kong,Kowloon Tong,Hong Kong 999077,China [4]School of Integrated Circuits,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China [5]Optics Valley Laboratory,Wuhan 430074,Hubei,China

出　　处：《Journal of Energy Chemistry》2024年第11期47-57,共11页能源化学（英文版）

基　　金：National Natural Science Foundation of China (Grant No. 62374065);Interdisciplinary Research promotion of HUST (No. 2023JCYJ040);Innovation Project of Optics Valley Laboratory (No. OVL2021BG008);Program of Science Technology of Wenzhou City (No. G20210011);financial support from the Innovation and Technology Commission (Grant no. MHP/104/21)。

摘　　要：Lead sulfide quantum dots(PbS QDs) hold unique characteristics, including bandgap tunability, solutionprocessability etc., which make them highly applicable in tandem solar cells(TSCs). In all QD TSCs, its efficiency lags much behind to their single junction counterparts due to the deficient interconnection layer(ICL) and defective subcells. To improve TSCs performance, we developed three kinds of ICL structures based on 1.34 and 0.96 e V PbS QDs subcells. The control, 1,2-ethanedithiol capped PbS QDs(PbS-EDT)/Au/tin dioxide(SnO_(2))/zinc oxide(Zn O), utilized SnO_(2) layer to obtain high surface compactness.However, its energy level mismatch causes incomplete recombination. Bypassing it, the second ICL(PbS-EDT/Au/Zn O) removed SnO_(2) and boosted the power conversion efficiency(PCE) from 5.75% to 8.69%. In the third ICL(PbS-EDT/poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine](PTAA)/Au/Zn O), a thin layer of PTAA can effectively fill fissures on the surface of PbS-EDT and also protect the front cells from solvent penetration. This TSC obtained a PCE of 9.49% with an open circuit voltage of 0.91 V, a short circuit current density of 15.47 m A/cm~2, and a fill factor of 67.7%. To the best of our knowledge, this was the highest PCE achieved by all PbS QD TSCs reported to date. These TSCs maintained stable performance for a long working time under ambient conditions.

关 键 词：Quantum dots Tandem solar cell Interconnection layer HYSTERESIS DEFECT 

分 类 号：TM914.4[电气工程—电力电子与电力传动]