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Organic white-light sources: multiscale construction of organic luminescent materials from molecular to macroscopic level

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Abstract

Organic luminescent materials play an integral role in the optoelectronic applications of displays and solid-state lighting. Nevertheless, high-performance organic luminescent materials require the efficient combination of two or more kinds of materials, which is extremely difficult owing to the completely different self-assembly behaviors of multicomponent molecules. Herein, based on a broad scale from the molecular, micro-/nano-scale, and macroscopic levels, we successfully demonstrate the multiscale construction of organic luminescent microwires of cocrystals, solid solutions, and core-shell microstructures. Through the wide selection of electron donor/acceptor pairs, a series of color-tunable charge-transfer (CT) cocrystals are formed via the intermolecular cooperative self-assembly process. On this basis, the high structural compatibility and perfect lattice mismatching (∼1.1%) of cocrystals are critical factors that facilitate the combination of dissimilar materials to form solid solutions and core/shell microwires. Significantly, because of the full-spectrum light transport from 400 to 800 nm, the nano-micro-scaled solid solution microwires act as microscale white-light sources [CIE (0.32, 0.36)]. Meanwhile, the macroscopic-scale core/shell organic-microwires demonstrate tunable white-light emission with a high color-rendering index (CRI) of 83, whose CIE coordinates span from (0.37,0.39) to (0.40,0.31). Therefore, our work provides a feasible approach to the multiscale synthesis of novel luminescent organic semiconductor materials, which could lay a solid foundation for organic optoelectronics.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (21971185, 51821002), and this project is also funded by the Collaborative Innovation Center of Suzhou Nano Science and Technology (CIC-Nano), and by the “111” Project of the State Administration of Foreign Experts Affairs of China.

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Authors and Affiliations

  1. Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, 215123, China

    Song Chen, Xue-Dong Wang, Ming-Peng Zhuo, Qiang Lv, Jing-Feng Liu & Liang-Sheng Liao

  2. Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Taipa, 999078, China

    Liang-Sheng Liao

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  1. Song Chen
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  2. Xue-Dong Wang
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  3. Ming-Peng Zhuo
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Correspondence to Xue-Dong Wang.

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Supporting information The supporting information is available online at http://chem.scichina.com and http://link.springer.com/journal/11426. The supporting materials are published as submitted, without typesetting or editing. The responsibility for scientific accuracy and content remains entirely with the authors.

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11426_2021_1214_MOESM1_ESM.docx

Organic white-light sources: multiscale construction of organic luminescent materials from molecular to macroscopic level

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Chen, S., Wang, XD., Zhuo, MP. et al. Organic white-light sources: multiscale construction of organic luminescent materials from molecular to macroscopic level. Sci. China Chem. 65, 740–745 (2022). https://doi.org/10.1007/s11426-021-1214-8

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  • DOI: https://doi.org/10.1007/s11426-021-1214-8

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