An AIEgen-based 3D covalent organic framework for white light-emitting diodes

Area of Science:

• Materials Science
• Chemistry
• Nanotechnology

Background:

• Designing and synthesizing three-dimensional covalent organic frameworks (3D COFs) presents significant challenges.
• Covalent organic frameworks (COFs) are crystalline porous polymers with tunable properties.

Purpose of the Study:

• To design and synthesize a novel AIEgen-based 3D COF with a high surface area.
• To investigate the structural, photophysical, and application properties of the synthesized 3D COF.
• To explore the potential of 3D COFs in white light-emitting diode (WLED) applications.

Main Methods:

• Synthesis of an AIEgen-based 3D COF (3D-TPE-COF).
• Characterization using powder X-ray diffraction (PXRD) and continuous rotation electron diffraction (cRED).
• Photoluminescence spectroscopy to determine quantum yield.
• Fabrication and testing of a prototype white LED (WLED) device.

Main Results:

• A high surface area (1084 m² g⁻¹) 3D COF was successfully synthesized.
• The 3D COF adopted a seven-fold interpenetrated pts topology.
• The material exhibited yellow fluorescence with a 20% photoluminescence quantum yield.
• A prototype WLED using the 3D COF demonstrated stable operation for 1200 hours without degradation.

Conclusions:

• The developed AIEgen-based 3D COF shows promise for stable WLED applications.
• This work facilitates the design of fluorescent 3D COFs for optoelectronic devices.
• The findings encourage further development of COF-based WLEDs.