Semitransparent Perovskite Solar Cells for Photovoltaic Application

Having a window that generates electricity when sunlight enters the room has long been a dream, and it is most likely to become reality with the advent of thin‐film perovskite solar cells (PSCs). As thin‐film solar cells, high‐efficiency PSCs have two significant advantages. One is that they can be flexible, and the other is that they can be semitransparent (ST). The power conversion efficiency (PCE) of PSCs is now over 25%; meanwhile, the PCE of ST‐PSCs is over 19% for devices formed using various fabrication processes and modification methods. Herein, the challenges leading to the deterioration of the PCE of ST‐PSCs are discussed along with their corresponding solutions. In detail, this review presents an overview of composition engineering, additive engineering, interface engineering, light management, and charge transport management, which are critical factors for fabricating high‐performance ST PSCs. Finally, new challenges and the outlook for future ST‐PSCs research are outlined.