Multifunctional MgO Layer in Perovskite Solar Cells

被引：77

作者：

Guo, Xudong ^{[1
]}

Dong, Haopeng ^{[1
]}

Li, Wenzhe ^{[1
]}

Li, Nan ^{[1
]}

Wang, Liduo ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Key Lab Organ Optoelect & Mol Engn, Minist Educ, Beijing 100084, Peoples R China

来源：

CHEMPHYSCHEM | 2015年 / 16卷 / 08期

基金：

中国国家自然科学基金;

关键词：

absorption; photochemistry; solar cells; stability; UV degradation; LOW-COST; EFFICIENT; ZNO; INTERFACE; TRANSPORT; FILMS; TIO2;

D O I：

10.1002/cphc.201500163

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A multifunctional magnesium oxide (MgO) layer was successfully introduced into perovskite solar cells (PSCs) to enhance their performance. MgO was coated onto the surface of mesoporous TiO2 by the decomposition of magnesium acetate and, therefore, could block contact between the perovskite and TiO2. X-ray photoelectron spectroscopy and infrared spectroscopy showed that the amount of H2O/hydroxyl absorbed on the TiO2 decreased after MgO modification. The UV/Vis absorption spectra of the perovskite with MgO modification revealed an enhanced photoelectric performance compared with that of unmodified perovskite after UV illumination. In addition to the photocurrent, the photovoltage and fill factor also showed an enhancement after modification, which resulted in an increase in the overall efficiency of the cell from 9.6 to 13.9%. Electrochemical impedance spectroscopy (EIS) confirmed that MgO acts as an insulating layer to reduce charge recombination.

引用

页码：1727 / 1732

页数：6

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