White Fluorescent Organic Light-Emitting Diodes with 100% Power Conversion

Overview

Journal Research (Wash D C)

Specialty Biology

Date 2024 Sep 18

PMID 39290967

Authors

Dongxue Ding

Zicheng Wang

Chunbo Duan

Chunmiao Han

Jing Zhang

Shuo Chen

Ying Wei

Hui Xu

Affiliations

Soon will be listed here.

Abstract

Energy-efficient lighting sources are desired to provide another solution of carbon emission reduction. White organic light-emitting diodes are promising, because of theoretical internal quantum efficiencies for 100% electric-to-light conversion. However, pure organic fluorescent materials still face a challenge in harvesting triplet excitons for radiation. Herein, we report a white fluorescent organic light-emitting diode having an external quantum efficiency of 30.7% and a power efficiency of 120.2 lm W. In the single emissive layers, we use blue thermally activated delayed fluorescent emitters to sensitize a yellow fluorescent emitter. Transient photoluminescence and electroluminescence analyses suggest that a blue thermally activated delayed fluorescent molecule with ~100% reverse intersystem crossing efficiency and negligible triplet nonradiative rate constant completely converts triplet to singlet, suppressing triplet quenching by a yellow fluorescent emitter and ensuring 100% power conversion.

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