Recent advancements and perspectives on light management and high performance in perovskite light-emitting diodes

Shaoni Kar*, Nur Fadilah Jamaludin, Natalia Yantara, Subodh G. Mhaisalkar*, Wei Lin Leong*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

46 Citations (Scopus)

Abstract

Perovskite semiconductors have experienced meteoric rise in a variety of optoelectronic applications. With a strong foothold on photovoltaics, much focus now lies on their light emission applications. Rapid progress in materials engineering have led to the demonstration of external quantum efficiencies that surpass the previously established theoretical limits. However, there remains much scope to further optimize the light propagation inside the device stack through careful tailoring of the optical processes that take place at the bulk and interface levels. Photon recycling in the emitter material followed by efficient outcoupling can result in boosting external efficiencies up to 100%. In addition, the poor ambient and operational stability of these materials and devices restrict further commercialization efforts. With best operational lifetimes of only a few hours reported, there is a long way to go before perovskite LEDs can be perceived as reliable alternatives to more established technologies like organic or quantum dot-based LED devices. This review article starts with the discussions of the mechanism of luminescence in these perovskite materials and factors impacting it. It then looks at the possible routes to achieve efficient outcoupling through nanostructuring of the emitter and the substrate. Next, we analyse the instability issues of perovskite-based LEDs from a photophysical standpoint, taking into consideration the underlying phenomena pertaining to defects, and summarize recent advances in mitigating the same. Finally, we provide an outlook on the possible routes forward for the field and propose new avenues to maximally exploit the excellent light-emitting capabilities of this family of semiconductors.

Original languageEnglish
Pages (from-to)2103-2143
Number of pages41
JournalNanophotonics
Volume10
Issue number8
DOIs
Publication statusPublished - Jun 1 2021
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2021 Shaoni Kar et al., published by De Gruyter.

ASJC Scopus Subject Areas

  • Biotechnology
  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Keywords

  • Light emission
  • Light outcoupling
  • Light-emitting diode
  • Perovskite

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