Organic Long-Persistent Luminescence from a Flexible and Transparent Doped Polymer

Area of Science:

• Materials Science
• Polymer Chemistry
• Optoelectronics

Background:

• Long-persistent luminescence (LPL) materials are widely used in various applications, including safety signs and toys.
• Current inorganic LPL materials require powder processing and blending with polymers, leading to poor compatibility, reduced mechanical properties, and limited transparency in composites.
• There is a need for advanced LPL materials with enhanced processability and performance.

Purpose of the Study:

• To develop a novel polymer-based organic LPL (OLPL) system.
• To overcome the limitations of inorganic LPL materials, such as poor polymer compatibility and processing difficulties.
• To create a flexible, transparent, and solution-processable LPL material.

Main Methods:

• Development of a polymer-based organic LPL system.
• Low-power excitation at room temperature.
• Characterization of luminescence properties, including phosphorescence and long-persistent luminescence.

Main Results:

• The developed OLPL system is flexible, transparent, and amenable to solution processing.
• The material exhibits long-persistent luminescence after initial phosphorescence from the donor upon low-power excitation.
• This polymer-based system demonstrates superior compatibility with polymer matrices compared to inorganic LPL powders.

Conclusions:

• A novel, flexible, and transparent polymer-based OLPL material has been successfully developed.
• The OLPL system offers a promising alternative to traditional inorganic LPL materials, overcoming issues of poor compatibility and limited mechanical properties.
• The solution processability and enhanced properties of this OLPL system open new avenues for advanced luminescent material applications.