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.

引用

页数：6

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