Electron Transporting Bilayer of SnO2 and TiO2 Nanocolloid Enables Highly Efficient Planar Perovskite Solar Cells

Hu, Manman1,2; Zhang, Luozheng1,2,3; She, Suyang1,2; Wu, Jianchang1,2; Zhou, Xianyong1,2; Li, Xiangnan1,2; Wang, Deng1,2; Miao, Jun1,2; Mi, Guojun1,2; Chen, Hong1,2; Tian, Yanqing1,2; Xu, Baomin1,2; Cheng, Chun1,2,4

2019-11-07

10.1002/solr.201900331

Solar RRL   影响因子和分区

2367-198X

Herein, commercially accessible SnO2 and home-made TiO2 nanoparticles as a combined electron transporting bilayer (ETBL) are applied to achieve highly efficient planar perovskite solar cells (PSCs). With the formed cascade-aligned energy levels from the proper stacking of SnO2 and TiO2 layers and the excellent defect-passivation ability of TiO2, SnO2/TiO2 ETBLs effectively reduce energy loss and inhibit defects formation both at the electron transporting layers (ETL)/perovskite interfaces and within the bulk of perovskite layer as revealed by a comprehensive analysis of photoelectric characteristic analysis, including ultraviolet photoelectron spectroscopy, photoluminescence, and electrochemical impedance spectroscopy. Consequently, the PSC devices acquired a power conversion efficiency (PCE) of 20.50% with a V-oc of 1.10 V, a J(sc) of 24.2 mA cm(-2) and an fill factor of 77%, which are superior to the values of the control device based on single SnO2 layer with a PCE of 18.09% (a 13.3% boosting on PCE). Moreover, there was no degradation after 49 days, indicating the great stability after adding TiO2 layer. Herein, it is demonstrated that the cascaded alignment of energy levels between the electrode and perovskite layer by ETBLs could be an effective approach to improve the photovoltaic performance of the PSCs with excellent long-term stability.

cascade-aligned energy level electron transporting bilayer perovskite solar cells SnO2 nanoparticles TiO2 nanoparticles

SCI ; EI

英语

第一 ; 通讯

Shenzhen Development and Reform Committee[2019-126]

Energy & Fuels ; Materials Science

Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000494847300001

WILEY-V C H VERLAG GMBH

20200207995323

Defects ; Energy dissipation ; Photoelectron spectroscopy ; Electrochemical impedance spectroscopy ; Perovskite solar cells ; Perovskite ; TiO2 nanoparticles

Minerals:482.2 ; Energy Losses (industrial and residential):525.4 ; Solar Cells:702.3 ; Nanotechnology:761 ; Chemistry:801 ; Inorganic Compounds:804.2 ; Materials Science:951

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Engn Res & Dev Ctr Flexible Solar Cells, Shenzhen 518055, Guangdong, Peoples R China
3.Southern Univ Sci & Technol, SUSTech Acad Adv Interdisciplinary Studies, Shenzhen 518055, Guangdong, Peoples R China
4.Southern Univ Sci & Technol, Guangdong Prov Key Lab Energy Mat Elect Power, Shenzhen 518055, Guangdong, Peoples R China

Hu, Manman,Zhang, Luozheng,She, Suyang,et al. Electron Transporting Bilayer of SnO2 and TiO2 Nanocolloid Enables Highly Efficient Planar Perovskite Solar Cells[J]. Solar RRL,2019,4(1).

Hu, Manman.,Zhang, Luozheng.,She, Suyang.,Wu, Jianchang.,Zhou, Xianyong.,...&Cheng, Chun.(2019).Electron Transporting Bilayer of SnO2 and TiO2 Nanocolloid Enables Highly Efficient Planar Perovskite Solar Cells.Solar RRL,4(1).

Hu, Manman,et al."Electron Transporting Bilayer of SnO2 and TiO2 Nanocolloid Enables Highly Efficient Planar Perovskite Solar Cells".Solar RRL 4.1(2019).