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首页> 外文期刊>Physica, B. Condensed Matter >Photoluminescence studies of Cd1-xZnxS nanocrystals
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Photoluminescence studies of Cd1-xZnxS nanocrystals

机译:Cd1-xZnxS纳米晶体的光致发光研究

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摘要

Cd1-xZnxS (0 <= x <= 0.5) nanocrystals have been synthesized using a simple chemical precipitation method. Morphological and crystallographic analyses have been done using transmission electron microscope (TEM) and X-ray diffraction (XRD). Room temperature energy and time resolved photoluminescence spectra of these synthesized nanophosphors have been studied using xenon lamp spectroflourometer and high peak power, pulsed N-2-laser excitation, respectively. Photoluminescence spectra are composed of broad peaks ranging from green to red region of the visible spectrum. Important optical parameters: excited state lifetime, trap-depth and decay constant values have been calculated from recorded luminescence decay curves. These nanophosphors; show typical lifetime shortening and high quantum yield with increasing concentration of Zn.
机译:使用简单的化学沉淀法合成了Cd1-xZnxS(0 <= x <= 0.5)纳米晶体。使用透射电子显微镜(TEM)和X射线衍射(XRD)进行了形态和晶体学分析。这些合成的纳米磷光体的室温能量和时间分辨光致发光光谱已分别使用氙灯分光光度计和高峰值功率,脉冲N-2-激光激发进行了研究。光致发光光谱由可见光谱中从绿色到红色区域的宽峰组成。重要的光学参数:激发态寿命,陷阱深度和衰减常数值是根据记录的发光衰减曲线计算得出的。这些纳米荧光粉;随着锌浓度的增加,金属的典型寿命缩短,量子产率高。

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