Peripheral engineering of platinum(II) dicarbene pincer complexes for efficient blue hyperphosphorescent organic light-emitting diodes

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

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Detail(s)

Original languageEnglish
Pages (from-to)3398-3405
Journal / PublicationMaterials Chemistry Frontiers
Volume7
Issue number16
Online published10 May 2023
Publication statusPublished - 21 Aug 2023

Abstract

Pt(II) dicarbene pincer complexes have been explored as deep-blue phosphors with narrowband emissions. Generally, they form excimers easily and their relatively long emission lifetimes also limit their applications as OLED emitters. Herein, we developed a simple method to modify 1,3-bisimidazol-3-ium pro-chelates and obtained three Pt(II) dicarbene pincer complexes, thus studying the issue of excimer formation vs. peripheral appendages. As a result, blue emissions can be maintained at doping concentrations of up to 20 wt% for IPrtBuPt. Moreover, the emission of IPrtBuPt was found to significantly overlap with the absorption of ν-DABNA, an efficient blue boron/nitrogen based multiresonant TADF molecule. A hyper-OLED using IPrtBuPt as a sensitizer and ν-DABNA as a terminal emitter achieved EQEs of up to 33.59%, FWHM of 20 nm and CIE coordinates of (0.124, 0.148). These results demonstrated a successful example of utilizing both structural engineering and smart device architecture for getting efficient blue devices with suppressed efficient roll-off. © The Royal Society of Chemistry and the Chinese Chemical Society 2023.

Citation Format(s)

Peripheral engineering of platinum(II) dicarbene pincer complexes for efficient blue hyperphosphorescent organic light-emitting diodes. / Zhu, Ze-Lin; Yan, Jie; Fu, Li-Wen et al.
In: Materials Chemistry Frontiers, Vol. 7, No. 16, 21.08.2023, p. 3398-3405.

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