Rapid Advances in Inverted Perovskite Solar Cells |
Kai Zhu National Renewable Energy Laboratory, , , |
Organic-inorganic hybrid halide perovskites have attracted significant R&D attention in the photovoltaic (PV) community as a competitive technology for future PV applications. Perovskite solar cells (PSCs) with an inverted (often referred to as p-i-n) structure are becoming increasingly attractive for commercialization due to the rapid increase in power conversion efficiency (PCE), easily scalable fabrication, reliable operation, and compatibility with various perovskite-based tandem device configurations. In this talk, I will discuss the key factors leading to recent rapid advances in developing efficient and stable p-i-n PSCs. Although there is still room for improvement in perovskite bulk materials optimization, interface engineering targeting either the bottom (buried) or top perovskite surface layer has become the most critical and effective approach for advancing PSC performance. In the second part of my talk, I will discuss our recent progress toward understanding the link between indoor and outdoor PSC degradation behaviors. To push PSCs toward commercialization, it is critical to understand device reliability under real-world outdoor conditions where multiple stress factors (e.g., light, heat, humidity) coexist. Understanding the link between indoor and outdoor behaviors is necessary to help identify accelerated indoor testing protocols to quickly guide PSC development. |