Abstract
We employed ultra-violet (UV) light treatment on the TiO2 layer prior to coating the perovskite layer to improve the solar conversion efficiency of perovskite solar cells (PSCs). A laboratory-made UV treatment system was equipped with various UV light sources (8 W power; maximum wavelengths of 254, 302, and 365 nm). The UV light treatment improved the power conversion efficiency (PCE) while coating the uniformity layer and removing impurities from the surface of cells. After the PSCs were exposed to UV light, their PCE developed approximately 10% efficiency; PBI2 decreased without changing the structure.
Highlights
In recent years, renewable energy sources have attracted increasing attention due to oil depletion and other environmental problems
Based on previous studies, we confirmed that UV light irradiation (UV-C) treatment improved the surface of a dye-sensitized solar cell (DSSC) [19]
We investigated the effect of the UV light source and the light irradiation time of the perovskite solar cells (PSCs) fabrication process to enhance its power conversion efficiency (PCE)
Summary
Renewable energy sources have attracted increasing attention due to oil depletion and other environmental problems. Compared to inorganic photovoltaic cells, organic material-based solar cells such as organic solar cells, dye-sensitized solar cells (DSSCs), and perovskite solar cells (PSCs) have low production costs, are light-weight, and have flexible device fabrication [3,4,5,6]. Despite their excellent advantages, organic material-based solar cells have low conversion efficiencies and unstable small-size devices (~1 cm2 ) [7]. Work comparing various ultraviolet light has not yet been in conducted in the field of PSCs. based on previous studies, we confirmed that UV light irradiation (UV-C) treatment improved the surface of a dye-sensitized solar cell (DSSC) [19].
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