Glass-to-glass encapsulation with ultraviolet light curable epoxy edge sealing for stable perovskite solar cells

Abstract Perovskite solar cells (PSCs) have rapidly achieved power conversion efficiencies comparable to those of first generation c-Si and second generation thin film solar cell technologies. Although studies on upscaling of PSC technology for practical applications are growing, operation stability remains a challenge and need to be addressed. Ingress of ambient moisture into the device architecture and subsequent decomposition of organometal halide perovskite absorber is identified as one of the major reason for poor operational stability of PSCs. In this letter, we report a low temperature glass-to-glass encapsulation of PSCs using ultraviolet (UV) light curable epoxy edge sealant. Controlled UV irradiation induces epoxy cross-linking and hermitic glass-to-glass encapsulation at