Engineering of perovskite light-emitting diodes based on quasi-2D perovskites formed by diamine cations

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Chiung-Han Chen
  • Zhenchao Li
  • Qifan Xue
  • Yu-An Su
  • Chia-Chen Lee
  • Wen-Chang Chen
  • Chu-Chen Chueh

Detail(s)

Original languageEnglish
Article number105400
Journal / PublicationOrganic Electronics
Volume75
Online published12 Aug 2019
Publication statusPublished - Dec 2019
Externally publishedYes

Abstract

Thus far, most of the layered quasi-2D perovskite materials exploited in the perovskite light-emitting diodes (PeLEDs) are based on large-size monoamine cations, which forms a bilayered organic barrier between the perovskite sheets (known as the Ruddlesden-Popper (RP) phase). However, the organic spacer between the perovskite sheets can be composed of a single-layer diamine cation, for which the perovskite sheets might possess a strengthened connection due to the direct linkage of the diamine cation (referred as the Dion-Jacobson (DJ) phase). Until now, the studies of PeLEDs based on the DJ phase 2D perovskite materials are still rare. Herein, a series of DJ phase quasi-2D EDBE(MAPbBr3)n-1PbBr4 perovskites [EDBE: 2,2-(ethylenedioxy)bis(ethylammonium)] is developed and their application in PeLEDs is investigated. Interestingly, different to the broad emission of the 2D EDBEPbBr4 film, the quasi-2D film exhibited a narrow emission, indicating a decreased lattice torsion and trap states. After careful device engineering, a green light-emitting perovskite LED based on the EDBE(MAPbBr3)2PbBr4 film is demonstrated to deliver a maximum luminescence of 1903 cd m−2 and a maximum EQE of 1.06%. We note such performance is inferior to the existing RP phase 2D perovskite, which is limited by the poor thermal stability of the studied EDBE-based 2D perovskites.

Research Area(s)

  • Diamine cation, Dion-Jacobson phase, Light-emitting diode, Quasi-2D perovskites

Citation Format(s)

Engineering of perovskite light-emitting diodes based on quasi-2D perovskites formed by diamine cations. / Chen, Chiung-Han; Li, Zhenchao; Xue, Qifan; Su, Yu-An; Lee, Chia-Chen; Yip, Hin-Lap; Chen, Wen-Chang; Chueh, Chu-Chen.

In: Organic Electronics, Vol. 75, 105400, 12.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review