Synergistic Tri-emission Enabling Single-Component White Organic Light-Emitting Transistors

Area of Science:

• Materials Science
• Organic Electronics
• Solid-State Physics

Background:

• White organic light-emitting transistors (OLETs) are crucial for advanced displays.
• Current OLET development faces challenges due to a lack of materials with both high charge carrier mobility and efficient white light emission.

Purpose of the Study:

• To present a novel molecular design strategy for achieving white electroluminescence in single-component OLETs.
• To synthesize and characterize a new material (DTA) based on this strategy.

Main Methods:

• Molecular design and synthesis of 2,6-bis(dibenzo[b,d]thiophen-3-yl)anthracene (DTA).
• Characterization of photoluminescence quantum yield and hole mobility.
• Fabrication and testing of single-component OLET devices using DTA.

Main Results:

• DTA exhibits a photoluminescence quantum yield of 35% and high hole mobility (5.8 cm² V⁻¹ s⁻¹).
• DTA shows synergistic white electroluminescence from monomer, excimer, and electromer emissions.
• Gate voltage dynamically tunes color temperature and achieves high color rendering.

Conclusions:

• The study introduces a new design paradigm for high-mobility white-light emitters.
• This work advances the development of practical single-component white OLETs for smart displays.