A diphenylphosphine oxide decorated multi-resonance TADF emitter for narrowband green electroluminescence with an EQE of 32.4.

Junjie DongYulin XuShuni WangJingsheng MiaoNengquan Li Zhongyan Huang Chuluo Yang

Published in: Chemical communications (Cambridge, England) (2024)

A new narrowband thermally activated delayed fluorescence emitter, PhCzBN-PO, was developed by incorporating the diphenylphosphine oxide (DPPO) group into a multi-resonance core. The unique properties of DPPO enabled PhCzBN-PO to achieve pure green emission and a nonplanar structure. The resulting electroluminescent devices achieved high external quantum efficiencies up to 32.4% with extremely low efficiency roll-off and pure-green emission with Commission Internationale de L'Eclairage (CIE) coordinates of (0.24, 0.67).

Keyphrases

energy transfer
quantum dots
light emitting
visible light
molecular dynamics