期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 22, 期 8, 页码 2605-2610出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201505055
关键词
air stability; bismuth; materials science; organic-inorganic hybrids; perovskites
资金
- Center for Next Generation Materials by Design (CNGMD), an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Basic Energy Sciences
- National Science Foundation [ECS-0335765, DMF-08-19762]
- Institute of Soldier Nanotechnologies at MIT
- MRSEC Shared Experimental Facilities at MIT
- Weizmann Institute of Science - National Postdoctoral Award Program for Advancing Women in Science
- People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme [FP7/2007-2013, PIOF-GA-2103-622630]
- Center for Excitonics, an Energy Energy Frontier Research Centers - U.S. Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0001088]
Methylammonium lead halide (MAPbX(3)) perovskites exhibit exceptional carrier transport properties. But their commercial deployment as solar absorbers is currently limited by their intrinsic instability in the presence of humidity and their lead content. Guided by our theoretical predictions, we explored the potential of methylammonium bismuth iodide (MBI) as a solar absorber through detailed materials characterization. We synthesized phase-pure MBI by solution and vapor processing. In contrast to MAPbX(3), MBI is air stable, forming a surface layer that does not increase the recombination rate. We found that MBI luminesces at room temperature, with the vapor-processed films exhibiting superior photoluminescence (PL) decay times that are promising for photovoltaic applications. The thermodynamic, electronic, and structural features of MBI that are amenable to these properties are also present in other hybrid ternary bismuth halide compounds. Through MBI, we demonstrate a lead-free and stable alternative to MAPbX(3) that has a similar electronic structure and nanosecond lifetimes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据