Internal quantum efficiency of radiation in a bulk CH3NH3PbBr3 perovskite crystal quantified by using the omnidirectional photoluminescence spectroscopy

被引：23
|
作者：
Kojima, K. [1 ]
Ikemura, K. [2 ]
Matsumori, K. [3 ]
Yamada, Y. [3 ]
Kanemitsu, Y. [4 ]
Chichibu, S. F. [1 ]
机构：
[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
[2] Hamamatsu Photon KK, Appl Spect Syst Dept, Higashi Ku, Hamamatsu, Shizuoka 4313196, Japan
[3] Chiba Univ, Grad Sch Sci, Inage Ku, Chiba 2638522, Japan
[4] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan
来源：
APL MATERIALS | 2019年 / 7卷 / 07期
关键词：
LIGHT-EMITTING-DIODES; HALIDE PEROVSKITES; RECOMBINATION;
D O I：
10.1063/1.5110652
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The internal quantum efficiency (IQE) of radiation for bulk CH3NH3PbBr3 crystals was quantified by using omnidirectional photoluminescence spectroscopy. The angle-resolved photoluminescence revealed that the emission with photon energies higher than the absorption-edge shows a Lambertian distribution and that the light extraction efficiency is determined by the escaping cone. The IQE value strongly depends on the photo-excitation density (P), and a CH3NH3PbBr3 crystal fabricated under the methylammonium-rich conditions gave the maximum IQE of 62.5% under P = 28 W/cm(2). A further increase in P gave rise to the decrease in IQE due to the Auger effects.
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页数：6
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