Efficient Light-Emitting Diodes Based on Nanocrystalline Perovskite in a Dielectric Polymer Matrix

Electroluminescence in light-emitting devices relies on the encounter and radiative recombination of electrons and holes in the emissive layer. In organometal halide perovskite light-emitting diodes, poor film formation creates electrical shunting paths, where injected charge carriers bypass the perovskite emitter, leading to a loss in electroluminescence yield. Here, we report a solution-processing method to block electrical shunts and thereby enhance electroluminescence quantum efficiency in perovskite devices. In this method, a blend of perovskite and a polyimide precursor dielectric (PIP) is solution-deposited to form perovskite nanocrystals in a thin-film matrix of PIP. The PIP forms a pinhole-free…

• RS
  Royal Society
• UO
  University of Cambridge
• NR
  National Research Foundation Singapore
• KA
  King Abdulaziz City for Science and Technology
• GC
  Gates Cambridge Trust
• EA
  Engineering and Physical Sciences Research Council

  Awards: EP/M005143/1, EP/G060738/1