Perovskite solar cells (PSCs) are widely recognized for their outstanding power conversion efficiency, but their vulnerability to heat undermines long-term stability and practical use. This study introduces a crystal facet engineering strategy to enhance thermal conductivity and reduce performance loss under elevated temperatures. By orienting the perovskite film toward the (100) facet, the researchers improved heat transfer, lowered operating temperature, and achieved stable power output even during prolonged illumination. The resulting inverted solar cells reached 25.12% efficiency while maintaining over 90% of initial performance after extended aging. These findings highlight thermal management through facet orientation as a powerful route to reliable, high-efficiency solar energy technologies.
Over the last decade, perovskite solar cells (PSCs) have achieved record efficiencies…
