Perovskite Quantum Dots Exhibiting Strong Hole Extraction Capability for Efficient Inorganic Thin Film Solar Cells

Chenhui Jiang; Jisong Yao; Peng Huang; Rongfeng Tang; Xiaomin Wang; Xunyong Lei; Hualing Zeng; Shuai Chang; Haizheng Zhong; Hongbin Yao; Changfei Zhu; Tao Chen

Cell Reports Physical Science (Jan 2020)

Perovskite Quantum Dots Exhibiting Strong Hole Extraction Capability for Efficient Inorganic Thin Film Solar Cells

Chenhui Jiang,
Jisong Yao,
Peng Huang,
Rongfeng Tang,
Xiaomin Wang,
Xunyong Lei,
Hualing Zeng,
Shuai Chang,
Haizheng Zhong,
Hongbin Yao,
Changfei Zhu,
Tao Chen

Affiliations

Chenhui Jiang: CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
Jisong Yao: Department of Applied Chemistry, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230026, China
Peng Huang: School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
Rongfeng Tang: CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
Xiaomin Wang: CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
Xunyong Lei: International Center for Quantum Design of Functional Materials, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China
Hualing Zeng: International Center for Quantum Design of Functional Materials, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China
Shuai Chang: School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
Haizheng Zhong: School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
Hongbin Yao: Department of Applied Chemistry, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230026, China
Changfei Zhu: CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
Tao Chen: CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China; Corresponding author

Journal volume & issue: Vol. 1, no. 1
p. 100001

Abstract

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Summary: Inorganic semiconductor Sb2(S,Se)3 possesses a suitable bandgap, environmentally benign elemental composition, and excellent stability, offering ample promise for next-generation low-cost solar cells. Here, we demonstrate that perovskite quantum dots (QDs), including CH3NH3PbBr3 and CsPbBr3, can serve as highly efficient and air-stable hole extraction materials in Sb2(S,Se)3 solar cells. Through a proper pre-treatment of the colloidal QDs, a 25-nm-thick QD film can be obtained with excellent uniformity and charge transport properties. Spectroscopic and photoelectrochemical analysis show that perovskite QDs can effectively extract holes from Sb2(S,Se)3 with suppressed carrier recombination. The perovskite QDs/Sb2(S,Se)3 heterojunction also establishes an increased built-in potential so that open-circuit voltage is pronouncedly enhanced. Finally, the device based on perovskite QDs/Sb2(S,Se)3 heterojunction boosts the efficiency from 4.43% to 7.82%, setting a record value, to the best of our knowledge, in Sb2(S,Se)3 solar cells. Our research manifests another application of perovskite materials and practical strategy toward efficiency improvement of Sb2(S,Se)3 solar cells.

Published in Cell Reports Physical Science

ISSN: 2666-3864 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Science: Physics
Website: https://www.cell.com/cell-reports-physical-science

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