Issue 11, 2018

Design of a novel and highly stable lead-free Cs2NaBiI6 double perovskite for photovoltaic application

Abstract

In recent years, lead-based perovskites have become the most promising photovoltaic materials, showing excellent photoelectronic performance. However, the lead-based perovskites also exhibit instability and significant environmental impact. In this study, we have first reported the synthesis and characterization of a new lead-free double perovskite material, Cs2NaBiI6 (CNBI), and determined its crystal structure and optical properties by various testing methods. CNBI has a low band gap of 1.66 eV and exhibits high stability against moisture and oxygen in ambient air. We have also inspected the crystal growth process of CNBI and elucidated its crystal growth mechanism. Solar cell devices fabricated with CNBI as the absorber layer have shown great stability and reproducibility.

Graphical abstract: Design of a novel and highly stable lead-free Cs2NaBiI6 double perovskite for photovoltaic application

Supplementary files

Article information

Article type
Paper
Submitted
01 अप्रैल 2018
Accepted
24 मई 2018
First published
24 मई 2018

Sustainable Energy Fuels, 2018,2, 2419-2428

Design of a novel and highly stable lead-free Cs2NaBiI6 double perovskite for photovoltaic application

C. Zhang, L. Gao, S. Teo, Z. Guo, Z. Xu, S. Zhao and T. Ma, Sustainable Energy Fuels, 2018, 2, 2419 DOI: 10.1039/C8SE00154E

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