As DSSCs are vulnerable to continuous irradiation of Ultra Violet (UV) light, for outdoor stability, a UV cut-off filter is vital to shield the UV light under outdoor conditions. Unfortunately, the large drop in photo-conversion efficiency by the UV cut-off is inevitable to maintain the outdoor stability. Herein, we propose a novel UV conversion layer using a unique combination of spectrum conversion materials with UV absorbing 1,8-naphthalimide derivatives in poly(ethylene-co-vinyl acetate) on the photo-anode. This functional layer has shown unique characteristics which form exciton complex molecules at high concentration under UV absorption. As a result of converting absorbed UV light to a visible light source for the sensitizing dye, the relative efficiency of the proposed DSSCs have shown comparable initial photo-conversion efficiency to bare DSSC and maintained 18% higher relative photo-conversion efficiency after 48 days outdoor conditions compared to a DSSC using a commercial UV cut-off filter.Scheme 1 Exciton complex forming spectrum conversion material with a compound of 1,8-naphthalimide derivatives in EVA (poly(ethylene-covinyl acetate)) is coated on the photo-anode of the DSSC.This journal is
The formation of a micro-crater structure with optimal morphology in a dye-sensitized solar cell (DSSC) improved the light scattering effect without an additional light scattering layer. In addition, it provided a wide entrance for a fast and complete electrolyte infiltration into the TiO2 film.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.