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- W3019165208 abstract "Numerous trap states and low conductivity of compact TiO2 layers are major obstacles for achieving high power conversion efficiency and high-stability perovskite solar cells. Here we report an effective Na2S-doped TiO2 layer, which can improve the conductivity of TiO2 layers, the contact of the TiO2/perovskite interface, and the crystallinity of perovskite layers. Comprehensive investigations demonstrate that Na cations increase the conductivity of TiO2 layers while S anions change the wettability of TiO2 layers, thus improving the crystallinity of perovskite layers and passivate defects at the TiO2/PVK interface. The synergetic effects of dopants lead to a champion efficiency as high as 21.25% in unencapsulated perovskite solar cells (PSCs), with much-improved stability. Our work provides new insights on anion dopants in TiO2 layers, which is usually neglected in previous reports, and also proposes a simple approach to produce low-cost and high-performance electron transport layers for high-performance PSCs." @default.
- W3019165208 created "2020-05-01" @default.
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- W3019165208 date "2020-04-27" @default.
- W3019165208 modified "2023-10-17" @default.
- W3019165208 title "Interface Defects Passivation and Conductivity Improvement in Planar Perovskite Solar Cells Using Na<sub>2</sub>S-Doped Compact TiO<sub>2</sub> Electron Transport Layers" @default.
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- W3019165208 doi "https://doi.org/10.1021/acsami.0c03180" @default.
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