Indoor photovoltaics have attracted increasing attention as power sources for low power consumption wireless electronics and the rapidly-growing Internet of Things(IoT).Highly tunable optical absorption,large absorption coefficients,and low leakage currents make organic photovoltaics(OPVs)promising for indoor application[1].Recently,a few OPVs have realized over 20％power conversion efficiencies(PCEs)under indoor light illumination,which are comparable or even superior to crystalline silicon(c-Si)solar cells[2].Besides,OPVs under indoor light illumination would exhibit longer operation lifetime than the ones under 1-sun illumination because of the absence of ultraviolet light and weak illumination intensity[3].Furthermore,it has been shown that OPVs are more efficient under variable incident light angles,which is not the case for silicon solar cells and is important for por-table electronics where the incident light angle can change[4,5].Therefore,a summary about the materials design and device engi-neering is valuable to the development of this burgeoning field.In Fig.1 and Table 1,we summarized the chemical structures of rep-resentative photovoltaic materials employed in indoor OPVs(IOPVs)and the relevant performance data,respectively.