Efficient Hybrid Mesoscopic Solar Cells with Morphology-Controlled CH3NH3Pbl3-xClx Derived from Two-Step Spin Coating Method

被引：101

作者：

Xu, Yuzhuan ^{[1
]}

Zhu, Lifeng ^{[1
]}

Shi, Jiangjian ^{[1
]}

Lv, Songtao ^{[1
]}

Xu, Xin ^{[1
]}

Xiao, Junyan ^{[1
]}

Dong, Juan ^{[1
]}

Wu, Huijue ^{[1
]}

Luo, Yanhong ^{[1
]}

Li, Dongmei ^{[1
]}

Meng, Qingbo ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Key Lab New Energy Mat & Devices, Key Lab Renewable Energy, Beijing 100190, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2015年 / 7卷 / 04期

关键词：

solar cells; mixed halide lead perovskite; morphology-control; preferential-growth; two-step spin coating; perovskite formation process; FILL FACTOR; PEROVSKITE; ELECTRON; TRANSPORT; DISORDER; LENGTHS;

D O I：

10.1021/am5057807

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A morphology-controlled CH3NH3PbI3-xClx film is synthesized via two-step solution deposition by spin-coating a mixture solution of CH3NH3Cl and CH3NH3I onto the TiO2/PbI2 film for the first time. It is revealed that the existence of CH3NH3Cl is supposed to result in a preferential growth along the [110] direction of perovskite, which can improve both the crystallinity and surface coverage of perovskite and reduce the pinholes. Furthermore, the formation process of CH3NH3PbI3-xClx perovskite is explored, in which intermediates containing chlorine are suggested to exist. 13.12% of power conversion efficiency has been achieved for the mesoscopic cell, higher than 12.08% of power conversion efficiency of the devices fabricated without CH3NH3Cl via the same process. The improvement mainly lies in the increasing open-circuit photovoltage which is ascribed to the reduction of reverse saturation current density.

引用

页码：2242 / 2248

页数：7

共 34 条

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