Bis-tridentate Ir(III) Metal Phosphors for Efficient Deep-Blue Organic Light-Emitting Diodes
Journal
Advanced Materials
Journal Volume
29
Journal Issue
33
Pages
1693-1705
Date Issued
2017
Author(s)
Hsin-Hung Kuo
Yi-Ting Chen
Leon R. Devereux
Chung-Chih Wu
Mark A. Fox
Chu-Yun Kuei
Yun Chi
Gene-Hsiang Lee
Abstract
Emissive Ir(III) metal complexes possessing two tridentate chelates (bis‐tridentate) are known to be more robust compared to those with three bidentate chelates (tris‐bidentate). Here, the deep‐blue‐emitting, bis‐tridentate Ir(III) metal phosphors bearing both the dicarbene pincer ancillary such as 2,6‐diimidazolylidene benzene and the 6‐pyrazolyl‐2‐phenoxylpyridine chromophoric chelate are synthesized. A deep‐blue organic light‐emitting diode from one phosphor exhibits Commission Internationale de l'Eclairage (CIE(x,y)) coordinates of (0.15, 0.17) with maximum external quantum efficiency (max. EQE) of 20.7% and EQE = 14.6% at the practical brightness of 100 cd m−2.
SDGs
Type
journal article