Light: Science & Applications (Mar 2021)

High-performance quasi-2D perovskite light-emitting diodes: from materials to devices

  • Li Zhang,
  • Changjiu Sun,
  • Tingwei He,
  • Yuanzhi Jiang,
  • Junli Wei,
  • Yanmin Huang,
  • Mingjian Yuan

DOI
https://doi.org/10.1038/s41377-021-00501-0
Journal volume & issue
Vol. 10, no. 1
pp. 1 – 26

Abstract

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Abstract Quasi-two-dimensional (quasi-2D) perovskites have attracted extraordinary attention due to their superior semiconducting properties and have emerged as one of the most promising materials for next-generation light-emitting diodes (LEDs). The outstanding optical properties originate from their structural characteristics. In particular, the inherent quantum-well structure endows them with a large exciton binding energy due to the strong dielectric- and quantum-confinement effects; the corresponding energy transfer among different n-value species thus results in high photoluminescence quantum yields (PLQYs), particularly at low excitation intensities. The review herein presents an overview of the inherent properties of quasi-2D perovskite materials, the corresponding energy transfer and spectral tunability methodologies for thin films, as well as their application in high-performance LEDs. We then summarize the challenges and potential research directions towards developing high-performance and stable quasi-2D PeLEDs. The review thus provides a systematic and timely summary for the community to deepen the understanding of quasi-2D perovskite materials and resulting LED devices.