Ultraviolet-activated long-lived room-temperature phosphorescence from small organic molecule-doped polymer systems

Autor: Yan Zheng, Yinyin Zhu, Zhonghao Wang, Youbing Li, Yan Su, Xian Zheng, Yanli Zhao, Jie Xia, Chang Wang, Chaolong Yang, Liang Gao, Yongfeng Zhang
Přispěvatelé: School of Physical and Mathematical Sciences
Rok vydání: 2021
Předmět:
Zdroj: Science China Materials. 65:2160-2168
ISSN: 2199-4501
2095-8226
Popis: Long-lived organic room-temperature phosphorescent (RTP) materials have attracted widespread attention because of their fantastic properties and application prospects. The current methods for developing RTP materials are mainly based on the synthesis of new chromophore molecules and crystallization engineering. However, there are great challenges in the preparation of new chromophore molecules and the use of crystalline materials. Herein, dynamic stimulus-responsive long-lived RTP systems with various emission colors are realized by doping organic chromophore molecules into polymer matrix prepared from vinyl acetate and acrylic acid. Through UV light irradiation, the growth process of long-lived RTP phenomena can be observed for up to 10 s. In particular, the phosphorescence intensity, lifetime, afterglow brightness, and quantum yield of one representative film (P2-M2) increase by 155, 262, 414, and 8 times after the irradiation, respectively. The unique photophysical phenomena are ascribed to the oxygen consumption characteristics of the polymer matrix under UV irradiation. Meanwhile, the information storage devices are prepared with these RTP systems. This work provides a strategy for achieving small organic molecule-doped polymer RTP systems that are easy to prepare, low-cost, and widely adaptable. Ministry of Education (MOE) This work was financially supported by the National Natural Science Foundation of China (21875025), the Special Program of Chongqing Science and Technology Commission (cstc2018jcyjAX0296), the Innovation Research Group at the Institutions of Higher Education in Chongqing (CXQT19027), the Science and Technology Research Program of Chongqing Municipal Education Commission (KJZD-K201801101), Chongqing Talent Program, the Science and Technology Project of Banan District, and the Innovation Support Plan for the Returned Overseas of Chongqing (cx2020052). The research was also supported by Singapore Academic Research Fund (RT12/19 and MOE-MOET2EP10120-0003).
Databáze: OpenAIRE
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