Research Update: Relativistic origin of slow electron-hole recombination in hybrid halide perovskite solar cells

被引：173

作者：

Azarhoosh, Pooya ^{[1
]}

McKechnie, Scott ^{[1
]}

Frost, Jarvist M. ^{[2
,3
]}

Walsh, Aron ^{[2
,3
,4
,5
]}

van Schilfgaarde, Mark ^{[1
]}

机构：

[1] Kings Coll London, Dept Phys, London WC2R 2LS, England

[2] Univ Bath, Ctr Sustainable Chem Technol, Claverton Down, Bath BA2 7AY, Avon, England

[3] Univ Bath, Dept Chem, Claverton Down, Bath BA2 7AY, Avon, England

[4] Yonsei Univ, Global Inst E3, Seoul 120749, South Korea

[5] Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea

来源：

APL MATERIALS | 2016年 / 4卷 / 09期

基金：

英国工程与自然科学研究理事会; 欧洲研究理事会;

关键词：

METHYLAMMONIUM LEAD IODIDE; RADIATIVE RECOMBINATION; SINGLE-CRYSTALS; CH3NH3PBI3; COEFFICIENT; TRIHALIDE; DIFFUSION; DYNAMICS; CARRIERS; SILICON;

D O I：

10.1063/1.4955028

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The hybrid perovskite CH3NH3PbI3 (MAPI) exhibits long minority-carrier life-times and diffusion lengths. We show that slow recombination originates from a spin-split indirect-gap. Large internal electric fields act on spin-orbit-coupled band extrema, shifting band-edges to inequivalent wavevectors, making the fundamental gap indirect. From a description of photoluminescence within the quasiparticle self-consistent GW approximation for MAPI, CdTe, and GaAs, we predict carrier lifetime as a function of light intensity and temperature. At operating conditions we find radiative recombination in MAPI is reduced by a factor of more than 350 compared to direct gap behavior. The indirect gap is retained with dynamic disorder. (C) 2016 Author(s).

引用

页数：8

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