Why triage materials with low luminescence quantum efficiency: The use of35Cbz4BzCNas a universal host for organic light emitting diodes through effective triplet energy transfer
Journal
Journal of Materials Chemistry C
Journal Volume
9
Journal Issue
7
Pages
2381 - 2391
Date Issued
2021
Author(s)
Huang Y.-M.
Chen, T.-Y.
Chen, D.-G.
Liang, H.-C.
Wu, C.-H.
Lee, M.M.
Chiu, T.-L.
Chiu, Y.-C.
Abstract
35Cbz4BzCN, a novel universal host with a long triplet lifetime, has been developed. The triplet excitons in35Cbz4BzCNcan be effectively harvested by phosphorescence and thermally activated delayed fluorescence emitters. In the 4CzIPN doped device, the best performance of a maximum current efficiency of 111.8 cd A?1, power efficiency of 86.8 lm W?1, and external quantum efficiency of 31.7% with a small efficiency roll-off of 103 cd A?1at 1000 cd m?2has been achieved.35Cbz4BzCNis also compatible with FIrpic to give sky-blue emission up to 46.3 cd A?1and with TXO-TPA to give orange-red emission up to 60.6 cd A?1efficiency. ? The Royal Society of Chemistry 2021.
Subjects
Energy transfer; Fluorescence; Organic light emitting diodes (OLED); Current efficiency; External quantum efficiency; Luminescence quantum efficiency; Power efficiency; Thermally activated delayed fluorescences; Triplet energy transfer; Triplet excitons; Triplet lifetimes; Quantum efficiency
SDGs
Type
journal article