Cool and Warm Hybrid White Organic Light-emitting Diode with Blue Delayed Fluorescent Emitter Both As Blue Emitter and Triplet Host

Overview

Journal Sci Rep

Specialty Science

Date 2015 Jan 20

PMID 25598436

Citations 12

Authors

Yong Joo Cho

Kyoung Soo Yook

Jun Yeob Lee

Affiliations

Soon will be listed here.

Abstract

A hybrid white organic light-emitting diode (WOLED) with an external quantum efficiency above 20% was developed using a new blue thermally activated delayed fluorescent material, 4,6-di(9H-carbazol-9-yl)isophthalonitrile (DCzIPN), both as a blue emitter and a host for a yellow phosphorescent emitter. DCzIPN showed high quantum efficiency of 16.4% as a blue emitter and 24.9% as a host for a yellow phosphorescent emitter. The hybrid WOLEDs with the DCzIPN host based yellow emitting layer sandwiched between DCzIPN emitter based blue emitting layers exhibited high external quantum efficiency of 22.9% with a warm white color coordinate of (0.39, 0.43) and quantum efficiency of 21.0% with a cool white color coordinate of (0.31, 0.33) by managing the thickness of the yellow emitting layer.

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