Suppression of Nonradiative Decay in TADF Emitters via a Macrocyclic Strategy: An Experimental Study
To experimentally investigate the impact of macrocyclic structures on the nonradiative decay rate constants (<i>k</i><sub>nr</sub><sup>s</sup>) of thermally activated delayed fluorescence (TADF), a macrocyclic molecule L-ring and its analogue NL-ring were designed and synthesized. The photophysical measurements reveal their TADF characteristics, and the <i>k</i><sub>nr</sub><sup>s</sup> of the L-ring (4.19 × 10<sup>6</sup> s<sup>-1</sup>) is slower than that of the NL-ring (1.96 × 10<sup>7</sup> s<sup>-1</sup>), endowing the L-ring with a photoluminescence quantum yield of 92.00%. Therefore, the L-ring device exhibited a high external quantum efficiency of 25.61%.
Authors
- Shaogang Shen
- Zhi Pang
- Xin Xie (ORCID: https://orcid.org/0000-0003-2314-4800)
- Teng Gao (ORCID: https://orcid.org/0000-0002-7909-6927)
- Yuanyuan Qin (ORCID: https://orcid.org/0000-0003-0482-4632)
- Xinyi Lv (ORCID: https://orcid.org/0009-0001-0972-1395)
- Ying Wang (ORCID: https://orcid.org/0000-0001-6638-8026)
Institutions
- Chinese Academy of Sciences (CN)
- Technical Institute of Physics and Chemistry (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Organic Letters
- Published
- 2024-12-24
- DOI
- https://doi.org/10.1021/acs.orglett.4c04202
- Citations
- 7
- Primary Topic
- Organic Light-Emitting Diodes Research
- Type
- article
- Field-Weighted Citation Impact
- 1.46
Funders
- Chinese Academy of Sciences
- National Program for Support of Top-notch Young Professionals