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April 16, 2026Angewandte Chemie International Edition

Solid‐State Red Carbon Quantum Frameworks With Narrowband Thermally Activated Delayed Fluorescence for Undoped LEDs With High‐Temperature Operational Stability

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Authors

XSXianzhi SongLYLinjuan YangRFRong Fan

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Overview

Novel framework achieves narrowband red emission in undoped LEDs, indicating improved efficiency and stability.

Key Points

  • To develop a solid-state red light-emitting diode (LED) framework with narrowband emission and high operational stability.
  • Developed solid-state red carbon quantum frameworks (SSR-CQFs) with flexible alkyl chains.
  • Performed optical measurements to assess photoluminescence quantum yield and emission characteristics.
  • Fabricated solution-processed undoped LEDs using SSR-CQFs.
  • SSR-CQFs show a narrowband emission peak at 635 nm with a full width at half maximum of 39 nm.
  • Achieved a photoluminescence quantum yield of 64% in neat films.
  • UDLEDs based on SSR-CQFs exhibit a maximum external quantum efficiency of 8.04% and an operational stability of 116 hours at high temperatures.

Cite This Study

Song et al. (2026) studied this question.

synapsesocial.com/papers/69e07e582f7e8953b7cbf5a8https://doi.org/10.1002/anie.2568667
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