Impact of Chemical Doping on Optical Responses in Bismuth-Doped CH3NH3PbBr3 Single Crystals: Carrier Lifetime and Photon Recycling

被引：98

作者：

Yamada, Yasuhiro ^{[1
]}

Hoyano, Mizuki ^{[1
]}

Akashi, Ryo ^{[1
]}

Oto, Kenichi ^{[1
]}

Kanemitsu, Yoshihiko ^{[2
]}

机构：

[1] Chiba Univ, Dept Phys, Inage Ku, Chiba 2638522, Japan

[2] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2017年 / 8卷 / 23期

关键词：

HALIDE PEROVSKITES; SOLAR-CELLS; EFFICIENT; RECOMBINATION; DIFFUSION; DYNAMICS; DENSITY; VOLTAGE; QUALITY;

D O I：

10.1021/acs.jpclett.7b02508

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We studied the optical responses of organic-inorganic halide perovskite CH3NH3PbBr3 single crystals doped with heterovalent Bi3+ ions (electron densities up to 2.3 X 10(12) cm(-3)). The Bi doping causes no significant changes in the band gap energy but leads to an enhanced Urbach tail and photoluminescence blue shift. On the basis of the time-resolved photoluminescence measurements, we attribute the PL response to a shorter carrier lifetime induced by Bi doping, which results in a reduced photon recycling effect (i.e., the repeated emission and reabsorption of photons inside the crystal). We discuss the physical relation between Bi concentration and the optical and electric properties of Bi-doped CH3NH3PbBr3 and reveal the unique nature of the Bi3+ ion as a dopant in halide perovskites.

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收藏

页码：5798 / 5803

页数：6

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