Designing spiro-fused chiral frameworks toward high-efficiency deep-blue circularly polarized thermally activated delayed fluorescence emission

Yang-Kun Qu; Xin-Yue Meng; Chen-Hao Guo; Zhi-Hao Qu; Meng Li; Chuan-Feng Chen; Zuo-Quan Jiang; Liang-Sheng Liao

doi:10.1039/D5TC03265B

Designing spiro-fused chiral frameworks toward high-efficiency deep-blue circularly polarized thermally activated delayed fluorescence emission

Yang-Kun Qu,

†^ab Xin-Yue Meng,†^b Chen-Hao Guo,^cd Zhi-Hao Qu,^b Meng Li,*^cd Chuan-Feng Chen,

^cd Zuo-Quan Jiang

*^b and Liang-Sheng Liao

*^ab

Author affiliations

* Corresponding authors

^a Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Taipa, Macau SAR, China
E-mail: lsliao@suda.edu.cn

^b State Key Laboratory of Bioinspired Interfacial Materials Science, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, PR China
E-mail: zqjiang@suda.edu.cn

^c Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
E-mail: limeng@iccas.ac.cn

^d University of Chinese Academy of Sciences, Beijing 100084, China

Abstract

A spiro-functionalized indolocarbazole donor was employed to construct the deep-blue thermally activated delayed fluorescence emitter ICZFBO. This emitter exhibits deep-blue emission at 437 nm in solution, a photoluminescence quantum yield of 91%, and an external quantum efficiency of 15.0% with excellent Commission Internationale de L'Eclairage coordinates (CIE) of (0.149, 0.072). The circularly polarized device shows electroluminescence with a dissymmetry factor of 2.1 × 10⁻³.

This article is part of the themed collection: Perspective on the technologies of OLEDs

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DOI: https://doi.org/10.1039/D5TC03265B
Article type: Communication
Submitted: 31 Aug 2025
Accepted: 05 Nov 2025
First published: 06 Nov 2025

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J. Mater. Chem. C, 2025, Advance Article

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Designing spiro-fused chiral frameworks toward high-efficiency deep-blue circularly polarized thermally activated delayed fluorescence emission

Y. Qu, X. Meng, C. Guo, Z. Qu, M. Li, C. Chen, Z. Jiang and L. Liao, J. Mater. Chem. C, 2025, Advance Article , DOI: 10.1039/D5TC03265B

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Journal of Materials Chemistry C

Designing spiro-fused chiral frameworks toward high-efficiency deep-blue circularly polarized thermally activated delayed fluorescence emission

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Designing spiro-fused chiral frameworks toward high-efficiency deep-blue circularly polarized thermally activated delayed fluorescence emission

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