Carbon dots (C-dots) with multicolor emission are promising in the development of white light emitting diode (WLED) devices with high efficiency and low cost. In this study, we synthesized C-dots with tricolor emissions of blue (C-DsCl), green (C-pPDDS) and red (C-pPD) via the hydrothermal method using dansyl chloride, p-phenyldiaminadansyl and p-phenylenediamine as precursors, respectively. The fluorescent properties of the synthesized C-dots were found to be dependent on the presence of heteroatoms obtained via modulation of the p-phenylenediamine and dansyl chloride molecules, leading to an increased quantum yield for the N and S co-doped C-dots. The C-dots/PVP film displayed good CRI up to 89, CCT of 5628 K and color coordinates of (0.33, 0.31), close to that of pure white-light emission (0.33, 0.33). So, the C-dots with multicolor emission produced in this study can be used as a color converter to produce high-quality WLEDs.

具有多色发射的碳点（C-dots）在开发具有高效率和低成本的白光发光二极管（WLED）器件方面很有前景。在这项研究中，我们通过水热法使用丹磺酰氯、对苯二胺基和对苯二胺合成了具有蓝色 (C-DsCl)、绿色 (C- p PDDS) 和红色 (C- p PD)三色发射的碳点分别作为前体。发现合成的碳点的荧光特性取决于通过调节p获得的杂原子的存在-苯二胺和丹磺酰氯分子，导致 N 和 S 共掺杂 C 点的量子产率增加。C-dots/PVP薄膜显示出良好的CRI高达89，CCT为5628 K，色坐标为(0.33, 0.31)，接近纯白光发射(0.33, 0.33)。因此，本研究中产生的具有多色发射的 C 点可以用作颜色转换器来生产高质量的 WLED。