Improvement of Colloidal Characteristics in a Precursor Solution by a PbI2-(DMSO)2 Complex for Efficient Nonstoichiometrically Prepared CsPbI2.8Br0.2 Perovskite Solar Cells

被引：15

作者：

Zhao, Hang ^{[1
,2
]}

Liu, Xiaolong ^{[1
,2
]}

Xu, Jia ^{[1
,2
]}

Li, Zhenzhen ^{[1
,2
]}

Fu, Yao ^{[1
,2
]}

Zhu, Honglu ^{[1
,2
]}

Yan, Luxin ^{[2
,3
]}

Liu, Zhike ^{[4
]}

Liu, Shengzhong Frank ^{[4
]}

Yao, Jianxi ^{[1
,2
]}

机构：

[1] North China Elect Power Univ, State Key Lab Alternate Elect Power Syst Renewabl, Beijing 102206, Peoples R China

[2] North China Elect Power Univ, Beijing Key Lab Energy Safety & Clean Utilizat, Beijing 102206, Peoples R China

[3] Wuwei Occupat Coll, Wuwei 733000, Peoples R China

[4] Shaanxi Normal Univ, Key Lab Appl Surface & Colloid Chem, Xian 710119, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2020年 / 12卷 / 43期

基金：

中国国家自然科学基金;

关键词：

PbI2-(DMSO)(2) complex; perovskite colloid; all-inorganic perovskite; solar cells; ANION-EXCHANGE; PERFORMANCE; GROWTH; FILMS; ORIENTATION; CH3NH3PBI3; MORPHOLOGY; CHEMISTRY; CALCITE; SIZE;

D O I：

10.1021/acsami.0c11994

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The optoelectronic properties of all-inorganic perovskite solar cells are greatly affected by the quality characteristics of films, such as the defect concentration, crystal growth orientation, crystallinity, and morphology. In this study, a PbI2-(DMSO)(2) complex is adopted to partially replace PbI2 as the lead source in the preparation of perovskite precursor solutions. Due to the rapid dispersion of the PbI2-(DMSO)(2) complex in a solvent, raw materials can rapidly react to form perovskite colloids with a narrow size distribution. Such uniform colloidal particles are found to be beneficial for achieving films with improved quality and highly orientated growth along the [001] direction. The optimized film exhibits a clearly improved crystallinity and a decrease in defect concentration from 4.29 x 10(15) cm-3 to 3.20 x 10(15) cm(-3). The device based on the obtained all-inorganic CsPbI2.8Br0.2 perovskite finally achieves an increase in photovoltaic power conversion efficiency from 10.5 to 14.15%. In addition, the environmental stability of the device also benefits from the improved film quality. After 480 h of storage in air, the device can still maintain nearly 80% of its initial performance.

引用

页码：48756 / 48764

页数：9

共 52 条

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