In:
Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 10, No. 12 ( 2022), p. 4705-4716
Abstract:
The exciton behavior of a new synthetic material, 11-phenyl-11 H -9,16-dioxa-11-aza-4 b -boraindeno[1,2- a ]naphtho[3,2,1- de ]anthracene (Ph-OBNA), which displays a multi-resonance effect, and bis[4-(9,9-dimethyl-9,10-dihydroacridine)phenyl] sulfone (DMAC-DPS) with a donor–acceptor-donor structure was analyzed. First, we conducted quantum mechanical simulations based on long-range theory (LC-ωPBE) to predict k RISC , and we confirmed the effect of the luminescence behavior by analyzing aggregation-caused quenching (ACQ) according to π–π stacking and aggregation-induced emission (AIE) behavior. Actually, thermally activated delayed fluorescence materials showing ACQ and AIE behavior exhibited different triplet–triplet annihilation (TTA) and singlet–triplet annihilation (STA) rate constants. Interestingly, DMAC-DPS exhibited a restricted exciton concentration quenching behavior based on an observed AIE owing to its inhibited molecular stacking behavior. On the other hand, Ph-OBNA demonstrated somewhat reduced TTA and STA behavior due to an ACQ behavior originating from excimer formation at high concentrations. Despite this difference, both materials demonstrated a hyperfluorescence behavior that can be used to achieve moderately high device efficiency compared with that obtained from common fluorescence emitters.
Type of Medium:
Online Resource
ISSN:
2050-7526
,
2050-7534
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2702245-6
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