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A temperature sensor with a wide spectral range based on a dual-emissive TADF dendrimer system

Author

Listed:
  • Changfeng Si

    (University of St Andrews)

  • Tao Wang

    (University of St Andrews)

  • Yan Xu

    (University of St Andrews)

  • Dongqing Lin

    (Nanjing University of Posts and Telecommunications)

  • Dianming Sun

    (University of St Andrews)

  • Eli Zysman-Colman

    (University of St Andrews)

Abstract

Dual emission from thermally activated delayed fluorescence (TADF) emitters is often difficult to observe, especially in solution, limited by Kasha’s rule. Two TADF dendrimers containing N-doped polycyclic aromatic hydrocarbons as acceptors are designed and synthesized. Compound 2GCzBPN, having a strongly twisted geometry, exhibits TADF, while 2GCzBPPZ, possessing a less twisted geometry, shows dual emission associated with the monomer and aggregate that is TADF. The demonstration reveals that 2GCzBPPZ can serve as a temperature sensor with excellent temperature sensitivity and remarkably wide emission color response in solution. By embedding 2GCzBPPZ in paraffin we demonstrate a spatial-temperature sensor that shows a noticeable emission shift from yellow to green and ultimately to blue as the temperature increases from 20 to 200 °C. We finally demonstrate the utility of these TADF dendrimers in solution-processed organic light-emitting diodes.

Suggested Citation

  • Changfeng Si & Tao Wang & Yan Xu & Dongqing Lin & Dianming Sun & Eli Zysman-Colman, 2024. "A temperature sensor with a wide spectral range based on a dual-emissive TADF dendrimer system," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-51231-x
    DOI: 10.1038/s41467-024-51231-x
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    References listed on IDEAS

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    1. Marc K. Etherington & Jamie Gibson & Heather F. Higginbotham & Thomas J. Penfold & Andrew P. Monkman, 2016. "Revealing the spin–vibronic coupling mechanism of thermally activated delayed fluorescence," Nature Communications, Nature, vol. 7(1), pages 1-7, December.
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