发光学报, 2017, 38 (10): 1287, 网络出版: 2017-10-17
氧化锌量子点和碳量子点及其复合物的制备与发光性能的研究
Preparation and Optical Properties of Zinc Oxide, Carbon and Their Quantum Dot Mixture
量子点复合物 ZnO量子点 碳量子点 光谱可调 白色荧光 quantum mixture ZnO quantum carbon quantum variable spectra white fluorescence
摘要
采用溶胶凝胶方法和水热法制备了水溶性荧光氧化锌量子点(ZnO-QDs)和碳量子点(C-QDs), 其量子效率分别达到38%和61%。基于所合成的ZnO-QDs和C-QDs制备了氧化锌和碳量子点复合物(ZnO/C-QDs), 并分别对其发光特性进行了研究。透射电镜(TEM)图像表明, 所合成的ZnO-QDs和碳量子点尺寸分布在3~6 nm之间, 分散均匀。光致发光光谱表明, ZnO-QDs和碳量子点的发光峰中心分别位于540 nm和450 nm, 两者发光峰的最佳激发波长为370 nm和350 nm。通过调整ZnO-QDs和C-QDs的体积比, 所制备的ZnO/C-QDs能够实现荧光光谱的连续可调, 并产生了白色荧光。
Abstract
Water-soluble fluorescence zinc oxide quantum dots (ZnO-QDs) and carbon quantum dots (C-QDs) were prepared by sol-gel and hydrothermal method, and their quantum yields were 38% and 61%, respectively. ZnO and carbon quantum dots mixtures (ZnO/C-QDs) were prepared based on the as-prepared ZnO-QDs and C-QDs, and their optical properties were investigated, respectively. The transmission electron microscopy (TEM) images indicate that the size of ZnO-QDs and C-QDs are around 3-6 nm and disperse uniformly. The photoluminescence (PL) spectra of ZnO-QDs and C-QDs dominate by a broad emission centered at around 540 nm and 450 nm, and their optimal excitation wavelengths are 370 nm and 350 nm. By adjusting the volume ratio between ZnO-QDs and C-QDs, the spectra of as-prepared ZnO/C-QDs show continuously variable properties, and white fluorescence can be observed from the ZnO/C-QDs.
杨广武, 张守超, 王翠红, 朱飞, 江越. 氧化锌量子点和碳量子点及其复合物的制备与发光性能的研究[J]. 发光学报, 2017, 38(10): 1287. YANG Guang-wu, ZHANG Shou-chao, WANG Cui-hong, ZHU Fei, JIANG Yue. Preparation and Optical Properties of Zinc Oxide, Carbon and Their Quantum Dot Mixture[J]. Chinese Journal of Luminescence, 2017, 38(10): 1287.