Semitransparent perovskite solar cells with exceptional efficiency and transmittance

A general approach to develop semitransparent perovskite solar cells (ST-PSCs) is to use a transparent metal oxide to replace opaque metal electrodes. However, the performance of such solar cells, unlike that of those using evaporated metal electrodes, deteriorates due to insufficient conductivity of the metal oxide, etc. Herein, a femtosecond laser patterning method is proposed to achieve efficiency and transparency of ST-PSCs with a typical metal electrode and facilitates the control of transmittance by varying the opening ratio. While providing average visible transmittance> 46%, a certified power conversion efficiency of 8.22% was attained, which outperformed state-of-the-art ST-PSCs reported to date.