ArticleAngewandte Chemie (International ed. in English)2022
Asymmetrical-Dendronized TADF Emitters for Efficient Non-doped Solution-Processed OLEDs by Eliminating Degenerate Excited States and Creating Solely Thermal Equilibrium Routes.
Article in Angewandte Chemie (International ed. in English), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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11 citing papers in PubMed.
- Hybridized through-bond/through-space charge transfer enables efficient blue emitters with the Rec. 2020 color gamut.Chemical science · 2026Article
- Polymer-Sensitized Hybrid Design Strategy for High-Efficiency Blue Hyperfluorescent OLEDs.Science advances · 2026Article
- High-Efficiency TADF Dendritic Emitters Enabled by Synchronously Inhibiting Degenerated Triplet Excited States and Structural Relaxation Toward Solution-Processed OLEDs with EQE Over 33.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Article
- High-resolution X-ray imaging via spatially decoupled heavy-atom antennas in organic scintillators.Nature communications · 2026Article
- Dendronized Encapsulation with Hierarchical Rigidification Enabling Robust Solution Room-Temperature Phosphorescence, Efficient Electroluminescence and Ultralong Afterglow.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Article
- The Golden Age of Thermally Activated Delayed Fluorescence Materials: Design and Exploitation.Chemical reviews · 2024Review
- Efficient red thermally activated delayed fluorescence emitters achieved through precise control of excited state energy levels.Chemical science · 2024Article
- Realizing efficient blue and deep-blue delayed fluorescence materials with record-beating electroluminescence efficiencies of 43.4.Nature communications · 2023Article
- Constructing high-efficiency orange-red thermally activated delayed fluorescence emitters by three-dimension molecular engineering.Nature communications · 2022Article
- Aggregation-Induced Intermolecular Charge Transfer Emission for Solution-Processable Bipolar Host Material via Adjusting the Length of Alkyl Chain.Molecules (Basel, Switzerland) · 2022Article
- Asymmetrical-Dendronized TADF Emitters for Efficient Non-doped Solution-Processed OLEDs by Eliminating Degenerate Excited States and Creating Solely Thermal Equilibrium Routes.Angewandte Chemie (International ed. in English) · 2022Article
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Abstract
The mechanism of thermally activated delayed fluorescence (TADF) in dendrimers is not clear. We report that fully-conjugated or fully-nonconjugated structures cause unwanted degenerate excited states due to multiple identical dendrons, which limit their TADF efficiency. We have synthesized asymmetrical "half-dendronized" and "half-dendronized-half-encapsulated" emitters. By eliminating degenerate excited states, the triplet locally excited state is ≥0.3 eV above the lowest triplet charge-transfer state, assuring a solely thermal equilibrium route for an effective spin-flip process. The isolated encapsulating tricarbazole unit can protect the TADF unit, reducing nonradiative decay and enhancing TADF performance. Non-doped solution-processed devices reach a high external quantum efficiency (EQE
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