Issue 41, 2024

Efficient solution-processed narrowband green-emitting organic light emitting diodes sensitized by a thermally activated delayed fluorescence polymer

Abstract

Multiple resonance thermally activated delayed fluorescence (MR-TADF) emitters have been widely used for highly efficient and ultrapure organic light-emitting diodes (OLEDs) via thermal deposition, while the low-cost solution procedure still remains underexplored. Herein, we propose a TADF polymer as the sensitizer of a narrowband emitter to fabricate solution-processed MR-TADF OLEDs. Due to the effective harvesting of triplet excitons, the sensitized devices based on TADF polymer achieve a narrowband electroluminescence, revealing a maximum external quantum efficiency (EQEmax) of 15.7% together with CIE coordinates of (0.28, 0.65). The performance is approximately 2 times higher than that of non-sensitized devices (7.0%), highlighting the great potential of TADF polymers in efficient solution-processed MR-TADF OLEDs.

Graphical abstract: Efficient solution-processed narrowband green-emitting organic light emitting diodes sensitized by a thermally activated delayed fluorescence polymer

Supplementary files

Article information

Article type
Paper
Submitted
22 জুলাই 2024
Accepted
07 সেপ্টে. 2024
First published
09 সেপ্টে. 2024

J. Mater. Chem. C, 2024,12, 16827-16833

Efficient solution-processed narrowband green-emitting organic light emitting diodes sensitized by a thermally activated delayed fluorescence polymer

L. Yan, B. Chen, D. Wang, N. Su, L. Zhao, S. Wang and J. Ding, J. Mater. Chem. C, 2024, 12, 16827 DOI: 10.1039/D4TC03115F

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