Synthesis and Properties of a Lead-Free Hybrid Double Perovskite: (CH3NH3)2AgBiBr6

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• 作者：Fengxia WeiZeyu Deng ; Shijing Sun ; Fenghua Zhang ; Donald M. Evans ; Gregor Kieslich ; Satoshi Tominaka ; Michael A. Carpenter ; Jie Zhang ; Paul D. Bristowe ; Anthony K. Cheetham
• 刊名：Chemistry of Materials
• 出版年：2017
• 出版时间：February 14, 2017
• 年：2017
• 卷：29
• 期：3
• 页码：1089-1094
• 全文大小：407K
• ISSN：1520-5002

文摘

The discovery of lead-free hybrid double perovskites provides a viable approach in the search for stable and environmentally benign photovoltaic materials as alternatives to lead-containing systems such as MAPbX₃ (X = Cl, Br, or I). Following our recent reports of (MA)₂KBiCl₆ and (MA)₂TlBiBr₆, we have now synthesized a hybrid double perovskite, (MA)₂AgBiBr₆, that has a low band gap of 2.02 eV and is relatively stable and nontoxic. Its electronic structure and mechanical and optical properties are investigated with a combination of experimental studies and density functional theory calculations.