Highly Efficient Perovskite Nanocrystal Light‐Emitting Diodes Enabled by a Universal Crosslinking Method

The preparation of highly efficient perovskite nanocrystal light-emitting diodes is shown. A new trimethylaluminum vapor-based crosslinking method to render the nanocrystal films insoluble is applied. The resulting near-complete nanocrystal film coverage, coupled with the natural confinement of injected charges within the perovskite crystals, facilitates electron–hole capture and give rise to a remarkable electroluminescence yield of 5.7%. Metal-halide perovskite semiconductors have attracted significant research interest, due to a combination of low-cost solution processability and remarkable performance in optoelectronic devices.1, 2 In 2014, we demonstrated infrared and visible electroluminescence in…

• CT
  Cambridge Trust
• CN
  Conselho Nacional de Desenvolvimento Científico e Tecnológico

  Award: 246050/2012-8
• LU
  Linköpings Universitet

  Award: 200900971
• GC
  Gates Cambridge Trust
• EA
  Engineering and Physical Sciences Research Council

  Awards: EP/M005143/1, EP/J017361/1, EP/M005143, EP/M005143/1, EP/G037221, EP/M507301/1, EP/J017361, EP/G037221/1, EP/J017361/1