Overcoming the electroluminescence efficiency limitations of perovskite light-emitting diodes

  title={Overcoming the electroluminescence efficiency limitations of perovskite light-emitting diodes},
  author={Himchan Cho and Su-Hun Jeong and Min-Ho Park and Young-Hoon Kim and Christoph Wolf and Chang-Lyoul Lee and Jin Hyuck Heo and Aditya Sadhanala and N Myoung and Seunghyup Yoo and Sang Hyuk Im and Richard H Friend and Tae-woo Lee},
Organic-inorganic hybrid perovskites are emerging low-cost emitters with very high color purity, but their low luminescent efficiency is a critical drawback. We boosted the current efficiency (CE) of perovskite light-emitting diodes with a simple bilayer structure to 42.9 candela per ampere, similar to the CE of phosphorescent organic light-emitting diodes, with two modifications: We prevented the formation of metallic lead (Pb) atoms that cause strong exciton quenching through a small increase… CONTINUE READING
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