Remarkable quality improvement of CsPbIBr2 perovskite film by cellulose acetate addition for efficient and stable carbon-based inorganic perovskite solar cells

被引：22

作者：

Liu, Jieqiong ^{[1
]}

He, Qingquan ^{[2
]}

Bi, Jiayu ^{[1
]}

Lei, Miao ^{[1
]}

Zhang, Wei ^{[1
]}

Wang, Guiqiang ^{[1
]}

机构：

[1] Bohai Univ, Sch Chem & Mat, Jinzhou 121003, Peoples R China

[2] Zhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2021年 / 424卷

基金：

中国国家自然科学基金;

关键词：

Cellulose acetate; Crystallinity enhancement; Quality improvement; Inorganic perovskite solar cells; Stability; PERFORMANCE; CHALLENGES; STRATEGIES;

D O I：

10.1016/j.cej.2021.130324

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

All-inorganic CsPbIBr2 perovskite has been regarded as a promising candidate for perovskite solar cells (PSCs) considering its suitable bandgap and high stability. However, the poor quality of CsPbIBr2 film greatly impedes the performance improvement of CsPbIBr2-based PSCs. Herein, we report a facile strategy to improve the quality of CsPbIBr2 perovskite film by introducing cellulose acetate (CA) into the perovskite precursor solution. The interaction between the oxygen functional groups of CA and Pb2+ and the increase of the precursor viscosity induced by CA addition can slow down the crystallization rate of CsPbIBr2 perovskite, which allows the perovskite films have enough time to form high-quality crystal structure. By optimizing the amount of CA (the optimal amount of CA is 2.5 wt%), a high-quality CsPbIBr2 perovskite film with high crystallinity, large grain size, and smooth surface is obtained. As consequence, the carbon-based PSC with a structure of FTO/TiO2/perovskite/carbon using the CsPbIBr2 perovskite film with 2.5 wt% CA achieves a champion efficiency of 7.52%, which is increased by 40.8% compared with the cell based on pure CsPbIBr2 perovskite film. In addition, the PSC based on CsPbIBr2 film with CA exhibits an excellent long-term stability under both ambient condition and highhumidity environment.

引用

页数：9

共 51 条

[51] Intermolecular Exchange Boosts Efficiency of Air-Stable, Carbon-Based All-Inorganic Planar CsPbIBr2 Perovskite Solar Cells to Over 9% [J].

Zhu, Weidong ;

Zhang, Qianni ;

Chen, Dazheng ;

Zhang, Zeyang ;

Lin, Zhenhua ;

Chang, Jingjing ;

Zhang, Jincheng ;

Zhang, Chunfu ;

Hao, Yue .

ADVANCED ENERGY MATERIALS, 2018, 8 (30)

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