Pivotal Routes for Maximizing Semitransparent Perovskite Solar Cell Performance: Photon Propagation Management and Carrier Kinetics Regulation

Semitransparent perovskite solar cells (ST‐PSCs) are ideal candidates for building‐integrated photovoltaics (BIPV) and tandem solar cells (TSCs) owing to their tunable bandgap and high visible transparency. The best power conversion efficiency (PCE) of ST‐PSCs is close to 15% with an average visible transmittance of over 20%, which still lags far behind the PCE of normal opaque PSCs. This can be attributed to the poor light utilization efficiency (LUE) of ST‐PSCs. Herein, the pivotal routes for maximizing LUE of ST‐PSCs in terms of photon propagation management and carrier kinetics regulation are systematically rationalized. First, the fundamental theoretical analyses on optical processes and electronic properties are provided. Then, insights on photon propagation management measures and carrier kinetics regulation strategies are provided. Furthermore, a summary of the promising commercial application of ST‐PSCs in BIPV and TSCs is provided. Finally, the main progress of ST‐PSCs is briefly summarized, and the directions for the commercialization of ST‐PSCs are proposed. A systematic understanding of the mechanism of photon propagation and carrier kinetics of semitransparent perovskite solar cells (ST‐PSCs) is critical for the development of high‐performance ST‐PSCs. In this paper, the key factors affecting the high light utilization of ST‐PSCs are deeply discussed from the theoretical analysis, and the recent advances from the view of photon propagation management and carrier kinetics regulation of ST‐PSCs are summarized, which provides guidance for promoting the rapid development and further commercialization of ST‐PSCs.