Why Lead Methylammonium Tri-Iodide Perovskite-Based Solar Cells Require a Mesoporous Electron Transporting Scaffold (but Not Necessarily a Hole Conductor)

被引：521

作者：

Edri, Eran ^{[1
]}

Kirmayer, Saar ^{[1
]}

Henning, Alex ^{[2
]}

Mukhopadhyay, Sabyasachi ^{[1
]}

Gartsman, Konstantin ^{[3
]}

Rosenwaks, Yossi ^{[2
]}

Hodes, Gary ^{[1
]}

Cahen, David ^{[1
]}

机构：

[1] Weizmann Inst Sci, Dept Mat & Interfaces, Fac Chem, IL-76100 Rehovot, Israel

[2] Tel Aviv Univ, Fac Engn, Dept Elect Engn Phys Elect, IL-69978 Ramat Aviv, Israel

[3] Weizmann Inst Sci, Dept Chem Res Support, Fac Chem, IL-76100 Rehovot, Israel

来源：

NANO LETTERS | 2014年 / 14卷 / 02期

关键词：

Perovskite solar cell; organic-inorganic lead halide; photovoltaic; electron beam induced current; scanning kelvin probe force microscopy; EFFICIENT; DEPOSITION; LENGTHS;

D O I：

10.1021/nl404454h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

CH3NH3PbI3-based solar cells were characterized with electron beam-induced current (EBIC) and compared to CH3NH3PbI3-xClx ones. A spatial map of charge separation efficiency in working cells shows p-i-n structures for both thin film cells. Effective diffusion lengths, L-D, (from EBIC profile) show that holes are extracted significantly more efficiently than electrons in CH3NH3PbI3, explaining why CH3NH3PbI3-based cells require mesoporous electron conductors, while CH3NH3PbI3-xClx ones, where L-D values are comparable for both charge types, do not.

引用

页码：1000 / 1004

页数：5

共 19 条

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