Alleviation of Cell-to-Module Efficiency Loss of Indoor Perovskite Solar Cells through Al2O3 Nanoparticles
발표자
()
초록
내용
With the tremendously increasing demand of internet of things (IoT) devices, light energy harvester became a potential candidate of power source for driving indoor IoT devices. Specifically, perovskite solar cells (PSCs) attract great attention for this application because of their excellent power conversion efficiency (PCE) under indoor light. However, interface defects in PSCs induce serious charge recombination, which critically diminish PCE for indoor conditions. In this study, we discovered that insertion of Al2O3 nanoparticles (NPs) at the electron transport layer (SnO2)/perovskite layer interface effectively suppresses the charge recombination at the corresponding interface. Using this approach, we achieved a high indoor PCE up to 32.6%. Moreover, diminished defects minimized cell-to-module PCE loss as low as 3.1%, resulting in indoor module PCE at 31.6%. These results suggest that the insertion of Al2O3 NPs can be an effectively optimize indoor PSC modules for IoT device.