磷光
材料科学
发光
发射强度
光电子学
二极管
强度(物理)
荧光
激发态
光强度
碳纤维
光学
原子物理学
复合材料
复合数
物理
作者
Jinshu Huang,Jinyang Zhu,Gang Yang,Yongsheng Zhu,Xiumei Xu,Gencai Pan
出处
期刊:Optics Express
[Optica Publishing Group]
日期:2021-07-24
卷期号:29 (25): 41014-41014
被引量:7
摘要
As an emerging class of luminescent materials, Carbon dots (CDs) have attracted tremendous attention in the metal-free room temperature phosphorescence (RTP) material, but the methods to enhance the emission intensity and prolonging the lifetime of RTP CDs were seldom reported. Herein, we developed a method to improve the emission intensity and increase the lifetime of green RTP CDs. The RTP lifetime of CDs has been extended about 12-fold (from 45 to 550 ms) through introducing polymer and the secondary modification of urea realized by means of heat treatment. Moreover, the emission intensity of RTP CDs has been increased about 20 times. It has been found that the improvement of RTP lifetime and emission intensity is benefited from the decreasing vibration and rotation of the excited triplet species, thus suppressing the non-radiative transitions. Furthermore, the prepared CDs with strong RTP both exhibit great potential in light-emitting diodes and anti-counterfeiting application.
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