Hydrogen‐Bond‐Based Polymer‐Ammonium Intermediates Induced Buried Interface Engineering for High‐Performance Inverted Perovskite Solar Cells

In this work, a high-molecular-weight polyvinyl pyrrolidone (PVP) is introduced into inverted perovskite solar cells as robust multi-functional interlayer to engineer the buried interface. The interaction energies derived from theory calculations imply PVP predominately interacts with ammonium cations to form the hydrogen-bond polymer-ammonium intermediates, thus largely retarding the perovskite crystallization, consequently affording higher V_oc and superior PCEs.

文章网址https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.202307568