Optoelectronic applications require the development of new fluorescent and efficient luminescent materials, free of toxicity, low in cost, and easy to produce. In this way the synthesis of zinc-oxide (ZnO) quantum dot...Optoelectronic applications require the development of new fluorescent and efficient luminescent materials, free of toxicity, low in cost, and easy to produce. In this way the synthesis of zinc-oxide (ZnO) quantum dots (QDs) has recently received special attention due to their good optical, electrical and chemical properties with low production costs and blue light emission. In this work ZnO QDs were successfully doped with europium in order to obtain a tunable emission luminescence from blue emission of ZnO to red emission of europium as a function of wavelength excitation. Results show an efficient blue to red tuning when the excitation wavelength was changed from 317 nm to 395 nm, respectively. This opens the possibility of having new optical devices to produce different color emission using the same material.展开更多
以海洋光学实验仪器(光谱仪、积分球、光纤、电源)为测量系统,搭建发光二极管(LED)光源特性测试平台,通过Spectra Suite软件对LED的光学特性数据获取与处理,分别测试白光、红光、黄绿光、蓝绿光、黄光和蓝光LED的光学性质。用光谱仪USB2...以海洋光学实验仪器(光谱仪、积分球、光纤、电源)为测量系统,搭建发光二极管(LED)光源特性测试平台,通过Spectra Suite软件对LED的光学特性数据获取与处理,分别测试白光、红光、黄绿光、蓝绿光、黄光和蓝光LED的光学性质。用光谱仪USB2000+与USB650 Red Tide获得各种LED光的辐射通量光谱分布图、发光强度光谱分布图、色品图,以及各单色光LED半宽度、峰值波长、色坐标、主波长、色纯度等数据,并对不同颜色的LED进行光学性能对比。实验结果表明,蓝光LED波峰辐射通量最大,红光LED单色性最好,红光的色纯度最大。简要比较光谱仪USB2000+与USB650 Red Tide在测量结果上的区别。展开更多
文摘Optoelectronic applications require the development of new fluorescent and efficient luminescent materials, free of toxicity, low in cost, and easy to produce. In this way the synthesis of zinc-oxide (ZnO) quantum dots (QDs) has recently received special attention due to their good optical, electrical and chemical properties with low production costs and blue light emission. In this work ZnO QDs were successfully doped with europium in order to obtain a tunable emission luminescence from blue emission of ZnO to red emission of europium as a function of wavelength excitation. Results show an efficient blue to red tuning when the excitation wavelength was changed from 317 nm to 395 nm, respectively. This opens the possibility of having new optical devices to produce different color emission using the same material.
文摘以海洋光学实验仪器(光谱仪、积分球、光纤、电源)为测量系统,搭建发光二极管(LED)光源特性测试平台,通过Spectra Suite软件对LED的光学特性数据获取与处理,分别测试白光、红光、黄绿光、蓝绿光、黄光和蓝光LED的光学性质。用光谱仪USB2000+与USB650 Red Tide获得各种LED光的辐射通量光谱分布图、发光强度光谱分布图、色品图,以及各单色光LED半宽度、峰值波长、色坐标、主波长、色纯度等数据,并对不同颜色的LED进行光学性能对比。实验结果表明,蓝光LED波峰辐射通量最大,红光LED单色性最好,红光的色纯度最大。简要比较光谱仪USB2000+与USB650 Red Tide在测量结果上的区别。
