期刊
ADVANCED FUNCTIONAL MATERIALS
卷 30, 期 51, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202005521
关键词
Cu doping; lead-free double perovskites; near-infrared absorption; photoconductivity
类别
资金
- Knut and Alice Wallenberg Foundation [KAW 2019.0082]
- Swedish Energy Agency [2018-004357]
- Grant Agency of the Czech Republic [GA19-05259S]
- VR Starting Grant [2019-05279]
- Carl Tryggers Stiftelse
- Olle Engkvist Byggmastare Stiftelse
- Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFO-Mat-LiU) [2009-00971]
- China Scholarship Council (CSC)
- Ministry of Science and Higher Education of the Russian Federation of NUST MISIS [K2-2019-001, 211]
- Swedish Research Council (VR) [2019-05551]
- Swedish Research Council [2016-07213]
- Swedish Research Council [2019-05551] Funding Source: Swedish Research Council
Lead-free halide double perovskites (A(2)B(I)B(III)X(6)) with attractive optical and electronic features are considered to be a promising candidate to overcome the toxicity and stability issues of lead halide perovskites (APbX(3)). However, their poor absorption profiles limit device performance. Here the absorption band edge of Cs(2)AgBiBr(6)double perovskite to the near-infrared range is significantly broadened by developing doped double perovskites, Cs-2(Ag:Cu)BiBr6. The partial replacement of Ag ions by Cu ions in the crystal lattice is confirmed by the X-ray photoelectron spectroscopy (XPS) and solid-state nuclear magnetic resonance (ssNMR) measurements. Cu doping barely affects the bandgap of Cs2AgBiBr6; instead it introduces subbandgap states with strong absorption to the near-infrared range. More interestingly, the near-infrared absorption can generate band carriers upon excitation, as indicated by the photoconductivity measurement. This work sheds new light on the absorption modulation of halide double perovskites for future efficient optoelectronic devices.
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