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
作者单位
天津城建大学 理学院, 天津 300384
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.

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