Alkyl Chain Introduction: In Situ Solar‐Renewable Colorful Organic Mechanoluminescence Materials |
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| Authors: | Dr Wenlang Li Dr Qiuyi Huang Dr Zhu Mao Dr Qi Li Prof Long Jiang Dr Zongliang Xie Dr Rui Xu Prof Zhiyong Yang Dr Juan Zhao Dr Tao Yu Prof Yi Zhang Dr Matthew P Aldred Prof Zhenguo Chi |
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| Institution: | PCFM Lab, GDHPPC Lab, Guangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional Films, State Key Laboratory of OEMT, School of Chemistry, Sun Yat-sen University, Guangzhou, China |
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| Abstract: | Mechanoluminescence (ML) materials are environmentally friendly and emit light by utilizing mechanical energy. This has been utilized in light sources, displays, bioimaging, and advanced sensors. Organic ML materials are strongly limited to application by in situ unrepeatable ML. Now, in situ solar‐renewable organic ML materials can be formed by introducing a soft alkyl chain into an ML unit. For the first time, the ML from these polycrystalline thin films can be iteratively produced by simply recrystallizing the fractured crystal in situ after a contactless exposure to sunlight within a short time (≤60 s). Additionally, their ML color and lifetime can be also easily tuned by doping with organic luminescent dyes. Therefore, large‐area sandwich‐type organic ML devices can be fabricated, which can be repeatedly used in a colorful piezo‐display, visual handwriting monitor, and sensitive optical sensor, showing a lowest pressure threshold for ML of about 5 kPa. |
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| Keywords: | alkyl chains mechanoluminescence solar-renewable |
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