一步水热法制备铜掺杂纳米碳点及其在白光器件中的应用

One-step Hydrothermal Synthesis of Copper Doped Carbon Dots and Their Application in White Light Devices

以一水合乙酸铜和苯胺为原料,合成了铜掺杂纳米碳点(Cu-CDs).通过优化实验参数,确定了合成Cu-CDs的最佳反应时间、反应温度和原料摩尔比分别为5 h, 210 ℃和1 ∶ 1.与相同条件下的对照实验相比, Cu的掺杂使碳点(CDs)的荧光强度明显提高,并实现了良好的多色发光性能.在365 nm紫外光激发下,Cu-CDs可直接发射强烈的白光.进一步与紫外发光二极管(LED)芯片结合,得到白色发光器件,色坐标为(0.337, 0.337),非常接近纯白光的色坐标(0.33, 0.33).这种制备Cu-CDs材料的方法及突出的白光发射性能,拓宽了碳点在发光器件中的应用.

Copper doped carbon dots(Cu-CDs) were synthesized with aniline and copper acetate as raw materials. Through the optimization of experimental parameters, the optimal reaction time, reaction temperature and molar ratio of raw materials for Cu-CDs synthesis were 5 h, 210 ℃ and 1 ∶ 1 , respectively. Comparing with the control group under the same conditions, it is found that the doping of Cu significantly improves the fluorescence intensity of CDs and achieves good multicolor luminescence performance. Cu-CDs can directly emit strong white light under 365 nm ultraviolet excitation. The white light emitting device is obtained with chromaticity coordinates of (0.337, 0.337) by further combining Cu-CDs with the ultraviolet light emitting diode(LED) chip. This method of preparing Cu-CDs materials in large quantity and its outstanding white light emitting performance have broaden the application of carbon dots in light emitting devices.