Issue 37, 2022

Alloying Sb into all inorganic lead-free CsBi3I10 for improving the crystal growth and photovoltaic performance

Abstract

The all-inorganic lead-free perovskite CsBi3I10 has recently emerged as a promising light absorber. However, the poor morphology of CsBi3I10 film remains a critical issue for fabricating high-performance solar cells. In this work, we report an ion substitution strategy by alloying Sb into CsBi3I10, resulting in dramatically improved grain crystallinity and markedly reduced bandgaps for better light utilization. The Sb-substituted CsBi3I10 film composed of highly-crystalline large grains can form a bulk-heterojunction structure with the electron acceptor PCBM to facilitate the exciton separation. With PTAA as the hole transport layer, the solar cell assembled using Cs(Bi0.7Sb0.3)3I10 can afford a champion power conversion efficiency of 1.54% with a high Voc of 0.81 V.

Graphical abstract: Alloying Sb into all inorganic lead-free CsBi3I10 for improving the crystal growth and photovoltaic performance

Supplementary files

Article information

Article type
Communication
Submitted
21 mar 2022
Accepted
24 may 2022
First published
27 may 2022

J. Mater. Chem. A, 2022,10, 19618-19625

Alloying Sb into all inorganic lead-free CsBi3I10 for improving the crystal growth and photovoltaic performance

J. Kang, S. Chen, M. Hao, J. Liu, M. Al-Mamun, P. Liu, Y. Wang, H. Yin and H. Zhao, J. Mater. Chem. A, 2022, 10, 19618 DOI: 10.1039/D2TA02245A

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