Efficient Trichromatic Ultralong Persistent Luminescence Activated by Body Temperature Toward Convenient Information...

Area of Science:

• Materials Science
• Solid State Chemistry
• Luminescence

Background:

• Long-persistent luminescence (LPL) materials capture and release light over extended periods, enabling applications in optical data storage and bioimaging.
• Achieving efficient, multicolor ultralong LPL with tunable durations remains a significant synthetic challenge.

Purpose of the Study:

• To develop a novel strategy for inducing trichromatic ultralong LPL in Cs2NaScCl6:Sb3+ through defect engineering.
• To precisely control the duration and color of persistent luminescence by manipulating material defects.

Main Methods:

• Defect engineering via controlled addition of hydrochloric acid during synthesis.
• Systematic regulation of Na+ and Cl- vacancies and Sb3+-induced lattice distortions.
• Characterization of luminescent properties and thermal quenching behaviors of self-trapped exciton (STE) emissions.

Main Results:

• Achieved record-breaking blue LPL exceeding 30 hours, green LPL for 48 hours, and red LPL for 24 hours.
• Demonstrated disparate thermal behaviors of dual STE emissions, with one exhibiting anti-thermal quenching.
• Elucidated LPL activation via body temperature for tactile information retrieval.

Conclusions:

• Defect engineering provides precise control over ultralong LPL properties in Cs2NaScCl6:Sb3+.
• The developed material shows potential for advanced applications like X-ray imaging and secure data encoding.
• This work offers a new pathway for designing tunable LPL materials activated by body temperature.