Heptagonal intramolecular-lock strategy enables high-performance thermally activated delayed fluorescence emitters

Huang, Zhenmei; Yang, Dezhi; Ma, Dongge; Bin, Zhengyang; You, Jingsong

doi:10.1007/s11426-023-1869-4

Cited by 5 publications

(1 citation statement)

References 47 publications

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“…Unlike conventional technologies like light-emitting diodes and liquid crystal displays, organic light-emitting diodes (OLEDs) mark the advent of a new generation of display technology. 1,2 Organic light-emitting materials offer large, flexible, curved and foldable screens with light weight, flexibility and controllable photophysical properties, presenting numerous application possibilities at a low cost. Due to their advantages in terms of energy efficiency, environmentally friendly nature, mass manufacturability, and high color rendering index (CRI), OLEDs have attracted substantial attention in the realms of displays, sensing, and solid-state lighting sources.…”

Section: Introductionmentioning

confidence: 99%

Single-molecule white organic light-emitting diodes based on dual-conformation diindolophenthiazine derivatives

Rui,

Pu,

Chen

et al. 2024

J. Mater. Chem. C

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Section: Introductionmentioning

confidence: 99%

Single-molecule white organic light-emitting diodes based on dual-conformation diindolophenthiazine derivatives

Rui,

Pu,

Chen

et al. 2024

J. Mater. Chem. C

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Design of Thermally Activated Delayed Fluorescence Materials: Transition from Carbonyl to Amide‐Based Acceptor

Luo,

Bao,

Liu

et al. 2024

Angewandte Chemie

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Benzophenone skeletons containing a carbonyl unit (O=C) have been widely used as electron acceptors in the thermally activated delayed fluorescence (TADF) materials. Herein, we present a novel molecular design concept for TADF materials by transitioning from a carbonyl to an amide (O=C–N) skeleton as the acceptor. The amide unit, compared to its carbonyl counterpart, offers a more stable electronic configuration. Leveraging this insight, we have developed a series of high‐performance TADF molecules based on benzoyl carbazole and carbazoline acceptors. These molecules exhibit exceptionally small singlet‐triplet energy gaps and pronounced aggregation‐enhanced emission properties, achieving photoluminescence quantum yields in neat films as high as 99%. Consequently, these materials serve as efficient emitters in non‐doped organic light‐eimtting diodes (OLEDs), reaching a maximum quantum efficiency (EQEmax) of up to 26.0%, significantly higher than the 17.0% obtained with benzophenone acceptor‐based TADF molecules. Additionally, they have been used as TADF hosts in narrowband red fluorescent OLEDs, setting a record‐high EQEmax of 22.4%.

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Synthesis and properties of naphthalimide derivative functionalized N,N′-bicarbazole for complementary white light-emitting diodes with exciplex

Xie,

Liu,

Yan

et al. 2024

J Mater Sci: Mater Electron

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Heptagonal intramolecular-lock strategy enables high-performance thermally activated delayed fluorescence emitters

Cited by 5 publications

References 47 publications

Single-molecule white organic light-emitting diodes based on dual-conformation diindolophenthiazine derivatives

Single-molecule white organic light-emitting diodes based on dual-conformation diindolophenthiazine derivatives

Design of Thermally Activated Delayed Fluorescence Materials: Transition from Carbonyl to Amide‐Based Acceptor

Synthesis and properties of naphthalimide derivative functionalized N,N′-bicarbazole for complementary white light-emitting diodes with exciplex

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