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- Title
Highly Improved Photocurrent Density and Efficiency of Perovskite Solar Cells via Inclined Fluorine Sputtering Process.
- Authors
Cho, Eunmi; Son, Jung Geon; Park, Chan Beom; Kim, In; Yuk, Dohun; Park, Jin‐Seong; Kim, Jin Young; Lee, Sang‐Jin
- Abstract
Increase in incident light and surface modification of the charge transport layer are powerful routes to achieve high‐performance efficiency of perovskite solar cells (PSCs) by improving the short‐circuit current density (JSC) and charge transport characteristics, respectively. However, few techniques are studied to reduce reflection loss and simultaneously improve the electrical performance of the electron transport layer (ETL). Herein, an inclined fluorine (F) sputtering process to fabricate high‐performance PSCs is proposed. The proposed process simultaneously implements the antireflection effect of F coating and the effect of F doping on a TiO2 ETL, which increases the amount of light transmitted into the PSC due to the extremely low refractive index (≈1.39) and drastically improves the electrical properties of TiO2. Consequently, the JSC of the F coating and doping perovskite solar cell (F‐PSC) increased from 25.05 to 26.01 mA cm−2, and the power conversion efficiency increased from 24.17% to 25.30%. The unencapsulated F‐PSC exhibits enhanced air stability after 900 h of exposure to ambient environment atmosphere (30% relative humidity, 25 °C under dark condition). The inclined F sputtering process in this study can become a universal method for PSCs from the development stage to commercialization in the future.
- Subjects
SOLAR cell efficiency; FLUORINE; ELECTRON transport; SHORT-circuit currents; SOLAR cells; SURFACE charges
- Publication
Advanced Functional Materials, 2023, Vol 33, Issue 25, p1
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.202301033