Tailoring quasi-2D perovskite thin films via nanocrystals mediation for enhanced electroluminescence

Tanghao Liu, Zhipeng Zhang, Qi Wei, Bingzhe Wang, Kaiyang Wang, Jia Guo, Chao Liang, Dandan Zhao, Shi Chen, Yuxin Tang, Yuanyuan ZHOU*, Guichuan Xing

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Quasi-2D halide perovskites have recently emerged as a promising family of semiconducting materials for light-emitting applications. However, these materials usually consist of mixed 2D-3D perovskite phases with rarely controlled distributions when processed into thin films. Such film structures can be detrimental to carrier transport and transfer, limiting the electroluminescent properties and light-emitting device performance. In this work, we tailor the solution crystallization of quasi-2D perovskites with a nanocrystals-mediation strategy, which leads to high-quality, low-defect-density quasi-2D perovskite films with uniformly mixed 2D-3D perovskite phases. Mechanistic insights gained from ultrafast spectroscopic studies reveal a highly enhanced carrier funnelling process in such nanocrystals-mediated films, which results in a threefold increase in the electroluminescence efficiency compared with the pristine thin pristine films. This work demonstrates the promise of a potentially versatile approach in using nanocrystals to manipulate the functional properties of quasi-2D perovskite thin films.

Original languageEnglish
Article number128511
JournalChemical Engineering Journal
Volume411
DOIs
Publication statusPublished - 1 May 2021

Scopus Subject Areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

User-Defined Keywords

  • Carrier funnelling
  • Defect density
  • Electroluminescence
  • Nanocrystals
  • Quasi-2D perovskite

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