Publication date: 15th December 2025
The broad-band emision of carbon dots (CDs) has been a key bottleneck restricting their application in high-color-purity optoelectronic devices,such as wide color gamut displays. To address this fundamental challenge, we propose a rational synthesis strategy to achieve full-color narrow-band emision from carbon dots. Through meticulous core-shell stucture engineering,by selecting highly symmetric precursors and fine-tuning reaction kinetics, we successfully achieved the tunable fabrication of high-color-purity near-infrared CDs,achieving a maximum emision wavelength of 704 nm and a minimum half-width of 29 nm. The superior performance of these narrow-band CDs has been validated in practical display prototypes. By integrating blue, gren,and red CDs onto a UV chip,a white light-emitting diode (W-LED) was fabricated. This device exhibits an extremely wide color gamut, covering 114% of the NTSC standard, fully demonstrating the high color purity of our materials and their application potential in next-generation display technologies. In summary,this work provides a fundamental design principle for overcoming the inherent broadband emision problem of carbon dots. It establishes narowband emision carbon dots as a viable,high-performance, heavy metal-free alternative to traditional quantum dots for use in demanding display applications.
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