Color Conversion Light Emitting Diodes Based on Carbon Quantum Dots

Carbon quantum dots have attracted much interest for their specific optical properties and a wide field of applications, in particular, for color conversion technologies. In the frame of this study, we present a new synthesis route of CQDs, which involves solid-state reaction technique and allows for the enhancement of photoluminescence and tunability of obtained nanomaterials. Subsequently, through optimization of synthesis parameters, mainly temperature and precursor concentration, we extracted unique features of CQDs-emissions from blue to red. Then, the color conversion efficiency of such CQDs was examined within diversified matrices, showing thereby their efficiency in converting excitation light into the desired emission colors. Further, investigation of the mechanisms responsible for enhancement of optical properties was pursued by correlating structural features with emissive behavior. Our findings lead us to confirm that solid-state reaction technique not only promotes the formation of high-quality carbon QDs but also opens an effective way for tuning their optical performance in pursuing applications in LED technology, solar cells, and bioimaging. The present work underlines the potential role that carbon QDs could have as an eco-friendly alternative in color conversion and opens up new perspectives for forthcoming developments in photonic devices.