High-performance large-area quasi-2D perovskite light-emitting diodes

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Changjiu Sun
  • Yuanzhi Jiang
  • Minghuan Cui
  • Lu Qiao
  • Junli Wei
  • Yanmin Huang
  • Li Zhang
  • Tingwei He
  • Saisai Li
  • Chaochao Qin
  • Run Long
  • Mingjian Yuan

Detail(s)

Original languageEnglish
Article number2207
Journal / PublicationNature Communications
Volume12
Online published13 Apr 2021
Publication statusPublished - 2021

Link(s)

Abstract

Serious performance decline arose for perovskite light-emitting diodes (PeLEDs) once the active area was enlarged. Here we investigate the failure mechanism of the widespread active film fabrication method; and ascribe severe phase-segregation to be the reason. We thereby introduce L-Norvaline to construct a COO-coordinated intermediate phase with low formation enthalpy. The new intermediate phase changes the crystallization pathway, thereby suppressing the phase-segregation. Accordingly, high-quality large-area quasi-2D films with desirable properties are obtained. Based on this, we further rationally adjusted films’ recombination kinetics. We reported a series of highly-efficient green quasi-2D PeLEDs with active areas of 9.0 cm2. The peak EQE of 16.4% is achieved in <n > = 3, represent the most efficient large-area PeLEDs yet. Meanwhile, high brightness device with luminance up to 9.1 × 104 cd m−2 has achieved in <n> = 10 film.

Research Area(s)

Citation Format(s)

High-performance large-area quasi-2D perovskite light-emitting diodes. / Sun, Changjiu; Jiang, Yuanzhi; Cui, Minghuan et al.
In: Nature Communications, Vol. 12, 2207, 2021.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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