journal article·2022-08-22

Performance Enhancement of Evaporated CsPbI2Br Perovskite Solar Cells with a CuSCN Hole Transport Layer via a Cesium Bromide Buffer Layer

Youping Liao, Nan Tian, Jilin Wang, Disheng Yao, Guoyuan Zheng, Bing Zhou, Yanhan Yang, Fei Long

ACS Applied Energy Materials· Volume 5· Issue 8
Publisher page

Abstract

Copper(I) thiocyanate (CuSCN), which is an ideal hole transport material (HTM), can remedy the disadvantages of organic HTMs due to its high mobility, excellent durability, hydrophobic property, and low cost. However, diethyl sulfide as a polar solvent for dissolving CuSCN damages the surface of the CsPbI2Br perovskite during the deposition of CuSCN. With the introduction of an ultrathin CsBr buffer layer between the CsPbI2Br and CuSCN layers, the degradation of the CsPbI2Br absorber layer caused by diethyl sulfide could be reduced, and the CsBr buffer layer could also passivate the defects at the CsPbI2Br surface. By introducing a 6 nm thick CsBr buffer layer, the power conversion efficiency of the CsPbI2Br–CuSCN-based perovskite solar cell (PVSC) devices fabricated by vacuum evaporation deposition was enhanced from 1.84 to 9.96%, which was comparable to the performance (11.8%) of the evaporated CsPbI2Br PVSCs using organic HTMs. Our work provides a practicable strategy to elevate the performance of CsPbI2Br PVSCs.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Organic Light-Emitting Diodes Research · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, People’s Republic of China

Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, Guilin 541004, People’s Republic of China

Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources, Guilin University of Technology, Guilin 541004, People’s Republic of China

School of Science, Xi’an University of Posts and Telecommunications, Xi’an 710121, People’s Republic of China

Funding

Guilin University of Technology · Natural Science Foundation of Shanxi Province · National Natural Science Foundation of China · Guangxi Distinguished Experts Special Fund · Guangxi Research Foundation for Science and Technology Base and Talent Special · Guangxi Key Laboratory of Optical and Electronic Materials and Devices · Guangxi Young and middle-aged teachers' basic ability improvement project

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