Dynamic Optical Properties of CH3NH3Pbl3 Single Crystals As Revealed by One- and Two-Photon Excited Photoluminescence Measurements

被引：345
作者：
Yamada, Yasuhiro [1 ]
Yamada, Takumi [1 ]
Le Quang Phuong [1 ]
Maruyama, Naoki [1 ]
Nishimura, Hidetaka [1 ]
Wakamiya, Atsushi [1 ]
Murata, Yasujiro [1 ]
Kanemitsu, Yoshihiko [1 ]
机构：
[1] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan
来源：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2015年 / 137卷 / 33期
关键词：
SOLAR-CELLS; PEROVSKITE CH3NH3PBI3; 2ND-HARMONIC GENERATION; EFFICIENCY; LENGTHS; RECOMBINATION; MOBILITIES; TRANSPORT;
D O I：
10.1021/jacs.5b04503
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The dynamic optical properties of perovskite CH(3)NH(3)Pbl(3) single crystals were studied by means of time-resolved photoluminescence (PL) spectroscopy at room temperature. The PL peak under one-photon excitation exhibits a red-shift with elapsing time, while two-photon PL is time-independent and appears at lower energy levels. The low-energy two-photon PL can be attributed to emissions from the localized states because of strong band-to-band absorption and photon re-absorption of the emitted light in the interior region. We revealed that the PL behaviors can be explained by the diffusion of photocarriers generated in the near-surface region to the interior region. The excitation fluence dependence of the one-photon PL dynamics is also discussed in terms of the electron-hole radiative recombination and carrier diffusion effects.
引用
收藏
页码：10456 / 10459
页数：4
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