Design of a novel and highly stable lead-free Cs2NaBiI6 double perovskite for photovoltaic application. Issue 11 (7th June 2018)

• Record Type: Journal Article
• Authors: Zhang, Chu; Gao, Liguo; Teo, Siowhwa; Guo, Zhanglin; Xu, Zhenhua; Zhao, Shuai; Ma, Tingli
• Is Part Of: Sustainable energy & fuels. Volume 2:Issue 11(2018)
• Page Start: 2419
• Page End: 2428
• Publication Date: 2018-06-07
• Subjects: Renewable energy sources -- Periodicals; Fuel cells -- Periodicals; Electric batteries -- Periodicals; Electrochemistry -- Periodicals; 660.297
• DOI: 10.1039/c8se00154e
• Languages: English
• ISSNs: 2398-4902

Abstract

Abstract : For the first time, a new lead-free double perovskite Cs2 NaBiI6 material was synthesized and applied to the perovskite solar cells. 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, Cs2 NaBiI6 (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.