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20 August 2020 Simultaneously Improving Lifetime and Efficiency of Organic Room Temperature Phosphorescence upon Tuning Noncovalent Intramolecular Interactions
Hao Chen, Hui Huang, Qian Peng, Lu Wang, Song Wang
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Proceedings Volume 11464, Physical Chemistry of Semiconductor Materials and Interfaces XIX; 1146412 (2020) https://doi.org/10.1117/12.2567869
Event: SPIE Nanoscience + Engineering, 2020, Online Only
Abstract
Room temperature phosphorescence (RTP) organic emitters have gained increasing attention in the fields of lighting, security and bioimaging. However, lack of clear mechanism and universal methods of regulating RTP property impeded the further development of RTP materials. Most importantly, the long lifetime and high quantum yield (QY) of RTP can hardly be achieved at the same time. Herein, we report a molecular design strategy to improve both lifetime and QY of RTP through intramolecular interaction. The enhancement of lifetime and QY were up to one order, respectively by introducing S···O noncovalent intramolecular interactions into the molecule. The X-ray single crystal analysis and theoretical calculations were performed together to give the solid evidence that the intramolecular interaction can not only suppress the nonradiative transition but also stabilize the triple states. This study provided a novel idea of developing high-performance RTP materials.
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Hao Chen, Hui Huang, Qian Peng, Lu Wang, and Song Wang "Simultaneously Improving Lifetime and Efficiency of Organic Room Temperature Phosphorescence upon Tuning Noncovalent Intramolecular Interactions", Proc. SPIE 11464, Physical Chemistry of Semiconductor Materials and Interfaces XIX, 1146412 (20 August 2020); https://doi.org/10.1117/12.2567869
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KEYWORDS
Phosphorescence
Molecular interactions
Crystals
Light sources and illumination
Molecules
Quantum efficiency
Solids
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