High-temperature negative thermal quenching phosphors from molecular-based materials

Area of Science:

• Materials Science
• Solid-State Chemistry
• Photophysics

Background:

• High-performance light-emitting devices rely on advanced phosphors.
• Negative thermal quenching (NTQ) phosphors are essential for specific applications.
• Developing NTQ phosphors with high operating temperatures is a key challenge.

Purpose of the Study:

• To investigate the high-temperature negative thermal quenching (NTQ) effect in novel phosphors.
• To explore copper iodide cluster-based coordination polymers as unconventional NTQ materials.
• To determine the NTQ operating temperature range of these new materials.

Main Methods:

• Synthesis of copper iodide cluster-based coordination polymers.
• Characterization of photoluminescence properties.
• Temperature-dependent luminescence measurements to identify NTQ behavior.

Main Results:

• Successfully synthesized deep-red to near-infrared (NIR) emitting copper iodide cluster-based coordination polymers.
• Observed a significant high-temperature NTQ effect in these materials.
• The NTQ operating temperature reached up to 500 K, the highest reported for molecular-based NTQ materials.

Conclusions:

• Copper iodide cluster-based coordination polymers are promising unconventional NTQ phosphors.
• These materials demonstrate exceptional thermal stability for NTQ applications.
• The high NTQ operating temperature opens new avenues for high-performance optoelectronic devices.