Synergistic Hematite-Fullerene Electron-Extracting Layers for Improved Efficiency and Stability in Perovskite Solar Cells

被引：90

作者：

Hou, Qinzhi ^{[1
]}

Ren, Jing ^{[1
]}

Chen, Haijun ^{[1
,2
]}

Yang, Pan ^{[3
]}

Shao, Qian ^{[4
]}

Zhao, Min ^{[5
]}

Zhao, Xiaochong ^{[3
]}

He, Hongcai ^{[1
]}

Wang, Ning ^{[1
,2
]}

Luo, Qiang ^{[1
]}

Guo, Zhanhu ^{[5
]}

机构：

[1] Univ Elect Sci & Technol China, State Key Lab Elect Thin Film & Integrated Device, Chengdu 610054, Sichuan, Peoples R China

[2] Hainan Univ, State Key Lab Marine Resource Utilizat South Chin, Haikou 570228, Hainan, Peoples R China

[3] China Acad Engn Phys, Inst Mat, Jiangyou 610200, Peoples R China

[4] Shandong Univ Sci & Technol, Coll Chem & Environm Engn, Qingdao 266590, Peoples R China

[5] Univ Tennessee, Dept Chem & Biomol Engn, ICL, Knoxville, TN 37966 USA

来源：

CHEMELECTROCHEM | 2018年 / 5卷 / 05期

基金：

中国博士后科学基金;

关键词：

hematite; charge recombination; fullerene; perovskite solar cells; stability; TRANSPORTING LAYER; LOW-TEMPERATURE; TIN OXIDE; PERFORMANCE; HYSTERESIS; TIO2;

D O I：

10.1002/celc.201701054

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Hematite, alpha-Fe2O3, is arising as a promising electron-extraction material in perovskite solar cells, yet present alpha-Fe2O3-based perovskite solar cells still show unsatisfactory efficiencies owing to large charge recombination. In this contribution, phenyl-C61-butyric acid methyl ester (PCBM) and alpha-Fe2O3 synergistically worked together as the electron transport layer (ETL) in planar heterojunction perovskite solar cells. The introduction of fullerene at the top of the alpha-Fe2O3 ETL improved the crystallinity of CH3NH3PbI3 perovskite and facilitated electron extraction. As a consequence, a substantially retarded charge recombination largely boosted the short-circuit current density and power conversion efficiency of perovskite solar cells. The optimized perovskite solar cells with alpha-Fe2O3/PCBM ETL showed a competitive power conversion efficiency of 14.2%, which is 20% higher than that of pristine alpha-Fe2O3-based solar cells. Moreover, alpha-Fe2O3/PCBM-based perovskite solar cells exhibited improved stability compared to the pristine alpha-Fe2O3-based devices, retaining over 95% of their initial values after 45days storage in dark in humid air.

引用

页码：726 / 731

页数：6

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