A warm-white light-emitting diode based on single-component emitter aromatic carbon nitride

Area of Science:

• Materials Science
• Solid-State Lighting
• Organic Electronics

Background:

• Artificial lighting accounts for significant global electricity consumption.
• White light-emitting diodes (WLEDs) are energy-efficient but often use complex multi-component emitters, leading to color instability.
• Developing single-component materials for WLEDs is crucial for simplified device structures and stable white light emission.

Purpose of the Study:

• To fabricate and investigate single-component white-light electroluminescence devices.
• To improve the performance of WLEDs by optimizing carrier transport in carbon nitride materials.
• To demonstrate the potential of aromatic carbon nitride as a cost-effective material for single-component WLEDs.

Main Methods:

• Fabrication of single-component electroluminescence devices using an aromatic carbon nitride material.
• Adjustment of carrier transport properties to enhance device performance.
• Characterization of electroluminescence properties, including color coordinates, color temperature, turn-on voltage, luminance, and external quantum efficiency.

Main Results:

• The fabricated carbon nitride LEDs emit warm-white light with color coordinates (0.44, 0.52) and a color temperature of 3700 K.
• Optimized devices exhibited a low turn-on voltage of 3.2 V.
• Achieved a maximum luminance of 1885 cd m⁻² and an external quantum efficiency of 1.20%.

Conclusions:

• Aromatic carbon nitride is a promising material for developing single-component white light-emitting diodes.
• The developed WLEDs offer a simplified device structure and stable color emission.
• These findings highlight the potential of low-cost carbon nitride materials for efficient and stable artificial lighting applications.