Molecular Engineering of Polymer Enabling Stability of Hybrid Perovskite Solar Cells

How to inhibit the formation of point defects in preparation process hybrid perovskite for improving stability and photovoltaic characteristics has been a hot research issue recent years. Herein, molecular engineering polyvinylpyrrolidone (PVP) is focused as Lewis base an additive improve interface matching solar cells. Based on binding strategy, film crystallinity, bond binding, interfacial transport, water resistance can be effectively regulated, resulting preferred characteristics. highest photoelectric conversion efficiency cells reaches 19.7% well improved Moreover, combined with first‐principles calculation, mechanism PVP macromolecules inducing through revealed, which provides feasible route using organic regulate crystallinity devices.