High performance perovskite solar cells by fluorine coating process
발표자
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초록
내용
We present a plasma-polymerized-fluorocarbon (PPFC) thin film as an anti-reflection (AR) coating material to improve the short-circuit current (Jsc) and power conversion efficiency (PCE) of perovskite solar cells (PSCs). Depositing PPFCs on transparent substrates increases overall transmittance and decreases reflectance due to the very low refractive index (~1.38). The thin film also has a self-cleaning effect due to its hydrophobic surface, good mechanical flexibility and high chemical stability. By applying the PPFC AR film to the flexible PSC, the PCE increased from 18.6% to 20.4% and showed excellent mechanical flexibility (bending radius: 4 mm) and high chemical stability. In addition, the inclined sputtering process simultaneously realizes the AR effect of PPFC coating and the effect of F doping on TiO2 ETL. In additon, PPFC thin films improve the long-term stability of PSCs in humid environments. Consequently, the AR PPFC thin films with the advantage of fabrication by large-area processes are suitable for use in high-performance PSCs.