Electroluminescence Stability of Organic Light-Emitting Devices Utilizing a Nondoped Pt-Based Emission Layer

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

3 Scopus Citations
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Author(s)

  • Yingjie Zhang
  • Jia-Ling Liao
  • Yun Chi
  • Hany Aziz

Detail(s)

Original languageEnglish
Pages (from-to)4760-4765
Journal / PublicationACS Omega
Volume3
Issue number5
Online published1 May 2018
Publication statusPublished - 31 May 2018

Abstract

We study the effects of using an emitting material (Pt(II) bis(3-(trifluoromethyl)-5-(2-pyridyl)pyrazolate - Pt(fppz)2) characterized by a preferred horizontal dipole alignment and a nearly unitary quantum yield regardless of concentration on the lifetime of organic light-emitting devices (OLEDs). Using such a material as a dopant in increasingly higher concentrations is found to lead to an increase in device stability, a trend that is different from that commonly observed with conventional OLED guests. The results are consistent with the newly discovered exciton-polaron-induced aggregation degradation mechanism of OLED materials. When this emitter is used as a neat emission layer, the material is already in a highly aggregated state, and the device is no longer affected by exciton-polaron interactions. The results demonstrate the potential stability benefits of using such materials in OLEDs. 

Citation Format(s)

Electroluminescence Stability of Organic Light-Emitting Devices Utilizing a Nondoped Pt-Based Emission Layer. / Zhang, Yingjie; Liao, Jia-Ling; Chi, Yun; Aziz, Hany.

In: ACS Omega, Vol. 3, No. 5, 31.05.2018, p. 4760-4765.

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