余辉
可见光谱
磷光
量子产额
孟加拉玫瑰
激发态
光致发光
材料科学
光化学
荧光
光电子学
化学
光学
物理
原子物理学
有机化学
伽马射线暴
天文
作者
Mingming Cheng,Peipei Wang,Lei Cao,Wen‐Fei Dong,Li Li,Rui Yan
标识
DOI:10.1016/j.jlumin.2022.119370
摘要
Compared to ultraviolet light, visible light is much more accessible and less damaging. However, afterglow materials that are excited by visible light remain a challenging issue. In this study, visible-light-excited phosphorescence combined with thermally activated delayed fluorescence were achieved by embedding Rose bengal (R) CDs (R-CDs) with a high quantum yield in a boric acid (BA) matrix. The R-CDs were prepared by thermally cleaving Rose bengal in an aqueous solution. At room temperature, the [email protected] composite exhibited a dual-emission afterglow spectrum with an afterglow lifetime of 583 ms at an emission wavelength of 450 nm. The afterglow time was visible to the naked eye for up to 5 s, and the photoluminescence quantum yield reached 18.09%. The quantum yield of phosphorescence is 0.6%. Consequently, the [email protected] composite materials were successfully employed in anti-counterfeiting, graphic security and white led emitting diodes. In summary, [email protected] hold great promises for the application in different fields. New afterglow materials and applications that are stimulated by visible light may be made possible as a result of these discoveries.
科研通智能强力驱动
Strongly Powered by AbleSci AI