熔融法制备PbSe量子点掺杂的硅酸盐光纤材料
发布时间：2018-12-27 18:40
【摘要】：近年来,半导体纳米材料(量子点)得到迅速发展。由于量子点(如II-VI, III-IV, IV-VI族元素)独特的光学性质,不同尺寸的量子点表现出不同的光学性质,从而引起人们极大的关注。近年来的研究指出,IV-VI量子点掺杂玻璃具有强的荧光辐射,例如:直径为4~10nm的PbSe量子点掺杂玻璃在1200~2300nm具有强的荧光辐射。 作为新型的光纤材料,PbSe量子点掺杂硅酸盐玻璃还未有过详细的报道。本文的工作如下: 首先,采用高温熔融法,首次成功制备了PbSe量子点掺杂硅酸盐玻璃。采用X射线衍射(XRD)仪、透射电镜(TEM)、紫外可见近红外分光光度仪、荧光光谱仪和X射线荧光光谱(XRF)仪等,对玻璃中生成的PbSe量子点的尺寸、密度分布、吸收光谱和荧光发射谱进行了观测与分析。结果表明:我们制备的PbSe量子点粒度分布范围较宽((5~13)±2nm)、体积比大约为(0.5~1)%。改变热处理温度和时间,可控制玻璃中生成的PbSe量子点的尺寸大小。通过引入配料ZnO,采用二步热处理等方法,可提高玻璃中量子点生成的浓度。光谱测量表明:我们得到的PbSe量子点玻璃具有荧光辐射强、辐射谱较宽(245~808nm)、辐射峰位于常规及长波带通信区域(1546~2757nm)等特点。 接着,通过较长时间(五个月)的观测对比,观测了量子点掺杂玻璃辐射光谱特性的时间稳定性。结果表明:本文制备的PbSe量子点掺杂玻璃光谱特性非常稳定,其荧光发射谱不随时间变化。 最后,在实验室中,采用熔融拉丝法,将PbSe量子点玻璃拉制成量子点光纤。用光学显微镜、TEM和光谱分析仪等,对量子点光纤的结构、机械性能、光纤中的量子点尺寸及其发射光谱进行了观测与分析。结果表明:我们拉制的量子点光纤直径均匀、表面光滑、光纤为圆截面、直径为60~120μm,其机械性能接近于普通的石英光纤。 基于以上的研究,结论是:PbSe量子点硅酸盐玻璃是一种新型的、具有高增益、宽带宽、性能稳定的光纤材料,有可能应用于今后新一代的量子点光纤放大器中。
[Abstract]:In recent years, semiconductor nanomaterials (quantum dots) have been developed rapidly. Due to the unique optical properties of quantum dots (such as II-VI, III-IV, IV-VI family elements), quantum dots of different sizes exhibit different optical properties, which has attracted much attention. In recent years, it has been pointed out that IV-VI quantum dot-doped glass has strong fluorescence radiation, for example, PbSe quantum dot-doped glass with diameter of 4~10nm has strong fluorescence radiation in 1200~2300nm. As a new fiber material, PbSe quantum dot doped silicate glass has not been reported in detail. The work of this paper is as follows: firstly, PbSe quantum dot-doped silicate glasses were successfully prepared by high temperature melting method. The size and density distribution of PbSe quantum dots in glass were measured by X-ray diffraction (XRD), transmission electron microscope, (TEM), ultraviolet visible near infrared spectrophotometer, fluorescence spectrometer and X-ray fluorescence (XRF). Absorption spectra and fluorescence emission spectra were observed and analyzed. The results show that the particle size distribution of the PbSe quantum dots prepared by our method is relatively wide (50.13) 卤2nm), and the volume ratio is about (0.5%)%. The size of PbSe quantum dots in glass can be controlled by changing the heat treatment temperature and time. The concentration of quantum dots in glass can be increased by introducing ZnO, into the glass and adopting two-step heat treatment. The spectral measurements show that the PbSe quantum dot glass has the characteristics of strong fluorescence radiation, wide radiation spectrum (245~808nm), and the radiation peak is located in the conventional and long wave band communication region (1546~2757nm). Then, the time stability of the spectral properties of quantum dot-doped glass is observed by comparison of a long time (five months). The results show that the spectral properties of the PbSe QDs doped glass are very stable, and the fluorescence emission spectra do not change with time. Finally, in the laboratory, the PbSe quantum dot glass was drawn to make the quantum dot fiber by the method of melt wire drawing. The structure, mechanical properties, quantum dot size and emission spectrum of quantum dot fiber were observed and analyzed by optical microscope, TEM and spectrum analyzer. The results show that the fiber is uniform in diameter and smooth in surface. The fiber has a circular section and a diameter of 60 ~ 120 渭 m. The mechanical properties of the fiber are close to those of ordinary quartz fiber. Based on the above research, it is concluded that PbSe quantum dot silicate glass is a new type of fiber material with high gain, wide bandwidth and stable performance, which may be used in the next generation quantum dot fiber amplifier.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TN304
本文编号：2393454
[Abstract]:In recent years, semiconductor nanomaterials (quantum dots) have been developed rapidly. Due to the unique optical properties of quantum dots (such as II-VI, III-IV, IV-VI family elements), quantum dots of different sizes exhibit different optical properties, which has attracted much attention. In recent years, it has been pointed out that IV-VI quantum dot-doped glass has strong fluorescence radiation, for example, PbSe quantum dot-doped glass with diameter of 4~10nm has strong fluorescence radiation in 1200~2300nm. As a new fiber material, PbSe quantum dot doped silicate glass has not been reported in detail. The work of this paper is as follows: firstly, PbSe quantum dot-doped silicate glasses were successfully prepared by high temperature melting method. The size and density distribution of PbSe quantum dots in glass were measured by X-ray diffraction (XRD), transmission electron microscope, (TEM), ultraviolet visible near infrared spectrophotometer, fluorescence spectrometer and X-ray fluorescence (XRF). Absorption spectra and fluorescence emission spectra were observed and analyzed. The results show that the particle size distribution of the PbSe quantum dots prepared by our method is relatively wide (50.13) 卤2nm), and the volume ratio is about (0.5%)%. The size of PbSe quantum dots in glass can be controlled by changing the heat treatment temperature and time. The concentration of quantum dots in glass can be increased by introducing ZnO, into the glass and adopting two-step heat treatment. The spectral measurements show that the PbSe quantum dot glass has the characteristics of strong fluorescence radiation, wide radiation spectrum (245~808nm), and the radiation peak is located in the conventional and long wave band communication region (1546~2757nm). Then, the time stability of the spectral properties of quantum dot-doped glass is observed by comparison of a long time (five months). The results show that the spectral properties of the PbSe QDs doped glass are very stable, and the fluorescence emission spectra do not change with time. Finally, in the laboratory, the PbSe quantum dot glass was drawn to make the quantum dot fiber by the method of melt wire drawing. The structure, mechanical properties, quantum dot size and emission spectrum of quantum dot fiber were observed and analyzed by optical microscope, TEM and spectrum analyzer. The results show that the fiber is uniform in diameter and smooth in surface. The fiber has a circular section and a diameter of 60 ~ 120 渭 m. The mechanical properties of the fiber are close to those of ordinary quartz fiber. Based on the above research, it is concluded that PbSe quantum dot silicate glass is a new type of fiber material with high gain, wide bandwidth and stable performance, which may be used in the next generation quantum dot fiber amplifier.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TN304
【引证文献】
相关博士学位论文 前1条
1 许周速;红外激光纳米增益材料制备及大功率激光输出特性研究[D];浙江工业大学;2012年
，本文编号：2393454
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