A single-component white-light-emitting hybrid copper(I) halide constructed using a supramolecular cation for WLEDs

Area of Science:

• Materials Science
• Solid-State Chemistry
• Photophysics

Background:

• Single-component white-light emitters are crucial for efficient and stable white light-emitting diodes (WLEDs).
• Achieving high efficiency and stability in single-component white-light emitters remains a significant challenge in materials science.

Purpose of the Study:

• To synthesize a novel single-component white-light emitter using a supramolecular cation strategy.
• To investigate the photophysical properties, stability, and potential applications of the synthesized material in WLEDs.

Main Methods:

• Supramolecular cation strategy was employed to synthesize the organic-inorganic hybrid copper(I) halide [(AMTA)(18C6)]2Cu2I4.
• Characterization involved analyzing its crystal structure, photoluminescence properties (emission spectra, quantum yield), and stability under ambient conditions.

Main Results:

• The synthesized compound [(AMTA)(18C6)]2Cu2I4 exhibits efficient white-light emission with dual bands (480 nm and 642 nm) and a high quantum yield of 62.09%.
• The material demonstrates excellent stability, remaining stable in air for over 90 days and under 75% humidity for 15 days.
• A fabricated WLED device achieved a color rendering index (CRI) of 84, suitable for general lighting.

Conclusions:

• The supramolecular cation strategy is effective in engineering high-performance single-component white-light emitters.
• The synthesized copper(I) halide shows great promise for applications in solid-state lighting due to its efficiency, stability, and color properties.