Enhanced efficiency and stability of planar perovskite solar cells by introducing amino acid to SnO2/perovskite interface

被引：116

作者：

Du, Jianhui ^{[1
]}

Feng, Liping ^{[2
]}

Guo, Xing ^{[1
]}

Huang, Xiangping ^{[1
]}

Lin, Zhenhua ^{[1
]}

Su, Jie ^{[1
]}

Hu, Zhaosheng ^{[1
]}

Zhang, Jincheng ^{[1
]}

Chang, Jingjing ^{[1
]}

Hao, Yue ^{[1
]}

机构：

[1] Xidian Univ, Sch Microelect, Adv Interdisciplinary Res Ctr Flexible Elect, Shaanxi Joint Key Lab Graphene,State Key Discipli, 2 South Taibai Rd, Xian 710071, Peoples R China

[2] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2020年 / 455卷

基金：

中国国家自然科学基金;

关键词：

Perovskite solar cells; Interface engineering; Self-assembly; SnO2; Glycine buffer layer; HIGH-PERFORMANCE; TIO2/PEROVSKITE INTERFACE; PHOTOVOLTAIC PERFORMANCE; CRYSTAL-GROWTH; TIN OXIDE; LAYERS; CH3NH3PBI3;

D O I：

10.1016/j.jpowsour.2020.227974

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：

Many recent studies have shown that perovskite solar cells (PSCs) employing SnO2 as an electron transport layer (ETL) exhibit extremely high efficiency which is close to that of the device with the same structure using TiO2. Considering the sensitivity of the PSC performance to the ETL/perovskite interface, interface engineering of the SnO2 electron transport layer helps to further release the potential of planar structure PSCs and promote their commercialization. Herein, we introduce an amino acid self-assembled layer onto the SnO2 ETL as the buffer layer to modulate the SnO2/perovskite lattice mismatch induced interface stress, and enhanced the interface interaction between SnO2 and perovskite caused by hydrogen-bonding and/or electrostatic interactions between the amino groups and the perovskites framework. Due to the improved perovskite film quality and enhanced interface charge transfer/extraction, a champion efficiency of 20.68% (J(sc) = 24.15 mA/cm(2), V-oc = 1.10 V, and FF = 0.78) is obtained for Cs(0)(.)(05)MA(y)FA(0)(.95-y)PbI(3-x)Cl(x) planar PSCs.

引用

页数：7

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