Flexible Indoor Perovskite Solar Cells by In Situ Bottom‐Up Crystallization Modulation and Interfacial Passivation

Abstract A robust perovskite‐buried interface is pivotal for achieving high‐performance flexible indoor photovoltaics as it significantly influences charge transport and extraction efficiency. Herein, a molecular bridge strategy is introduced utilizing sodium 2‐cyanoacetate (SZC) additive at the perovskite‐buried interface to simultaneously achieve in situ passivation of interfacial defects and bottom‐up crystallization modulation, resulting in high‐performance flexible indoor photovoltaic applications. Supported by both theoretical calculations and experimental evidences, it illustrates how SZCs serve as molecular bridges, establishing robust bonds between SnO 2 transport layer and perovskite, mitigating…

• NN
  National Natural Science Foundation of China

  Awards: B21005, 61974085
• HE
  Higher Education Discipline Innovation Project

  Award: B21005
• NU
  National University Research Fund of China

  Award: GK202201005