Efficient and Stable Red Perovskite Light‐Emitting Diodes via Thermodynamic Crystallization Control

Abstract Efficient and stable red perovskite light‐emitting diodes (PeLEDs) demonstrate promising potential in high‐definition displays and biomedical applications. Although significant progress has been made in device performance, meeting commercial demands remains a challenge in the aspects of long‐term stability and high external quantum efficiency (EQE). Here, an in situ crystallization regulation strategy is developed for optimizing red perovskite films through ingenious vapor design. Mixed vapor containing dimethyl sulfoxide and carbon disulfide (CS 2 ) is incorporated to conventional annealing, which contributes to thermodynamics dominated perovskite crystallization for well‐aligned cascade phase…

• NN
  National Natural Science Foundation of China

  Awards: 62320106004, 62274117, 62075061, 12075303
• SA
  Science and Technology Commission of Shanghai Municipality

  Award: 22520760600
• FP
  Fundo para o Desenvolvimento das Ciências e da Tecnologia

  Award: 0018/2022/A1
• SA
  Science and Technology Innovation Plan Of Shanghai Science and Technology Commission

  Award: 22520760600