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Photosensitization-Controlled Dynamic Organic Room-Temperature Phosphorescence.

Jingyi Shan1, Huan Chen1, Yaru Gao2

  • 1State Key Laboratory of Flexible Electronics (LoFE) & Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, P.R. China.

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|July 31, 2025
PubMed
Summary

Researchers developed controllable dynamic organic room temperature phosphorescence (RTP) materials by integrating triplet photosensitizers. This strategy enhances phosphorescence performance and enables applications in intelligent optoelectronics and information encryption.

Keywords:
Dynamic phosphorescencePhotosensitizationRoom temperature phosphorescence

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Photophysics

Background:

  • Dynamic organic room temperature phosphorescence (RTP) materials offer unique luminescence properties for intelligent optoelectronics.
  • Existing dynamic RTP materials often have chromophores acting as both emitters and oxygen sensitizers, leading to poor control and reduced performance.

Purpose of the Study:

  • To develop a strategy for controllable dynamic RTP materials with enhanced phosphorescence performance.
  • To decouple the roles of phosphorescent emitters and oxygen sensitizers in dynamic RTP systems.

Main Methods:

  • Integration of triplet photosensitizers into RTP polymers.
  • Adjustment of photosensitizer concentration to control photoactivation time.
  • Synthesis of diverse RTP polymers via copolymerization and physical doping.

Main Results:

  • Achieved accurate control over photoactivation time (3-30 s) by adjusting photosensitizer concentration.
  • Significantly prolonged phosphorescence lifetime after photoactivation (from 558 ms to 1017 ms).
  • Demonstrated versatility through various RTP polymer syntheses and alternative photosensitizers.

Conclusions:

  • The proposed strategy enables controllable dynamic RTP and maintains high phosphorescence performance.
  • The developed materials show potential for dynamic intelligent afterglow displays and multilevel information encryption.
  • This work advances stimuli-responsive materials for intelligent optoelectronics.