Joule
ArticleImproving Efficiency and Stability of Perovskite Solar Cells Enabled by A Near-Infrared-Absorbing Moisture Barrier
Context & Scale
Perovskite solar cells (PSCs) have attracted tremendous attention because of the high efficiencies, ease of fabrication, and low cost of production. However, further enhancement of device efficiency has been a bottleneck, and the instability of the PSCs hampers their commercialization. In this work, we strategically introduce a new multi-functional interface layer that integrates five different functions to improve the device efficiency and long-term stability of PSCs, pushing forward the development of the PSC technology. A significantly improved power conversion efficiency of 21.0% was achieved along with the remarkable stability (up to 1,700 h) without encapsulation under various external stimuli (light, heat, and moisture). These results open new avenues to design advanced interlayers, simplifying the device structure, and enhancing efficiency and stability, that can accelerate the market readiness of perovskite-based optoelectronics.