Strategic Approaches for Achieving High-Power Perovskite Solar Cells Under Indoor Light Conditions—Defect Control by Interface Engineering

Recently, photovoltaic technologies for indoor energy harvesting have great interest for operating indoor electronic devices associated with the Internet of Things (IoT). Perovskite solar cells developed for this purpose have shown excellent power conversion efficiency over 35 % under low-intensity 1,000 lux indoor light conditions. Despite intensitve research effort, relationship between photovoltaic properties under 1SUN and low-intensity light illumination still remains unclear. In addition, effect of defect states, which is one of the most critical parameter affecting power generation, on power loss under low-intensity light has not been deeply investigated yet.<br/>In this presentation, I would like to introduce various methods for improving power conversion efficiency of perovskite solar cells under low-intensity light conditions based on control of defect states through rationale interface engineering.