First N-Borylated Emitters Displaying Highly Efficient Thermally Activated Delayed Fluorescence and High-Performance OLEDs

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

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Author(s)

  • Yi-Jyun Lien
  • Tzu-Chieh Lin
  • Chun-Chieh Yang
  • Yu-Cheng Chiang
  • Chih-Hao Chang
  • Shih-Hung Liu
  • Yi-Ting Chen
  • Gene-Hsiang Lee
  • Pi-Tai Chou
  • Chin-Wei Lu

Detail(s)

Original languageEnglish
Pages (from-to)27090-27101
Journal / PublicationACS Applied Materials and Interfaces
Volume9
Issue number32
Online published21 Jul 2017
Publication statusPublished - 16 Aug 2017
Externally publishedYes

Abstract

Despite the fast boom of thermally activated delayed fluorescence (TADF) emitters bearing borane-based acceptor, so far, no TADF emitter with a direct B-N linkage between N-donor and boryl acceptor has been reported. The latter should simplify the molecular architecture and hence facilitate the synthetic design and versatility. We report here the preparation and characterization of a new series of N-borylated compounds with functional acridine donor unit; namely: ACBM, PACBM, and SACBM. Spectroscopic studies were performed to explore their photophysical properties that exhibited prominent solvatochromism and thermally activated delayed fluorescence. The time-dependent DFT calculation indicated the involvement of substantial intramolecular charge transfer character for which HOMO and LUMO are spatially separated. For compound SACBM, fabrication of green emitting OLED gave CIE chromaticity of (0.22, 0.59) and maximum external quantum efficiency, luminance efficiency and power efficiency of 19.1%, 60.9 cd/A, and 43.6 lm/W, respectively, demonstrating for the first time the highly efficient OLEDs using N-borylated TADF emitters.

Research Area(s)

  • acridine, borane, organic light emitting diodes, solvatochromism, thermally activated delay fluorescence

Citation Format(s)

First N-Borylated Emitters Displaying Highly Efficient Thermally Activated Delayed Fluorescence and High-Performance OLEDs. / Lien, Yi-Jyun; Lin, Tzu-Chieh; Yang, Chun-Chieh; Chiang, Yu-Cheng; Chang, Chih-Hao; Liu, Shih-Hung; Chen, Yi-Ting; Lee, Gene-Hsiang; Chou, Pi-Tai; Lu, Chin-Wei; Chi, Yun.

In: ACS Applied Materials and Interfaces, Vol. 9, No. 32, 16.08.2017, p. 27090-27101.

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