Halogen-doped phosphorescent carbon dots for grayscale patterning

Yanfeng Liu; Mahmoud Al-salihi; Yong Guo; Roman Ziniuk; Songtao Cai; Luwei Wang; Yuan Li; Zhigang Yang; Dengfeng Peng; Kai Xi; Zhongfu An; Xudong Jia; Liwei Liu; Wei Yan; Junle Qu

doi:10.1038/s41377-022-00856-y

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Halogen-doped phosphorescent carbon dots for grayscale patterning

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- Halogen-doped phosphorescent carbon dots for grayscale patterning
- Halogen-doped phosphorescent carbon dots for grayscale patterning
- Light: Science & Applications 2022年11卷第7期页码：1464-1474
- Affiliations：
  
  1.Center for Biomedical Photonics and College of Physics and Optoelectronic Engineering, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, 518060, China
  2.School of Chemistry and Chemical Engineering, Nanjing University, 163 Xianlin Road, Nanjing, 210023, China
  3.Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
- Author bio：
  
  Wei Yan (weiyan@szu.edu.cn)
  Junle Qu (jlqu@szu.edu.cn)
- Funds：
- DOI：10.1038/s41377-022-00856-y
  中图分类号：
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Yanfeng Liu, Mahmoud Al-salihi, Yong Guo, 等. Halogen-doped phosphorescent carbon dots for grayscale patterning[J]. Light: Science & Applications, 2022,11(7):1464-1474.

Li, Y. F. et al. Halogen-doped phosphorescent carbon dots for grayscale patterning. Light: Science & Applications, 11, 1464-1474 (2022).
Yanfeng Liu, Mahmoud Al-salihi, Yong Guo, 等. Halogen-doped phosphorescent carbon dots for grayscale patterning[J]. Light: Science & Applications, 2022,11(7):1464-1474. DOI： 10.1038/s41377-022-00856-y.

Li, Y. F. et al. Halogen-doped phosphorescent carbon dots for grayscale patterning. Light: Science & Applications, 11, 1464-1474 (2022). DOI： 10.1038/s41377-022-00856-y.

摘要

Abstract

Flexible organic materials that exhibit dynamic ultralong room temperature phosphorescence (DURTP) via photoactivation have attracted increasing research interest for their fascinating functions of reversibly writing-reading-erasing graphic information in the form of a long afterglow. However, due to the existence of a nonnegligible activation threshold for the initial exposure dose, the display mode of these materials has thus far been limited to binary patterns. By resorting to halogen element doping of carbon dots (CDs) to enhance intersystem crossing and reduce the activation threshold, we were able to produce, for the first time, a transparent, flexible, and fully programmable DURTP composite film with a reliable grayscale display capacity. Examples of promising applications in UV photography and highly confidential steganography were constructed, partially demonstrating the broad future applications of this material as a programmable platform with a high optical information density.

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