共沉淀法合成的 ZnS:Mn(2+) 纳米粒子的光致发光和光电导性能。
Photoluminescence and photoconductivity of ZnS:Mn(2+) nanoparticles synthesized via co-precipitation method.
机构信息
EPR Laboratory, Department of Physics, University of Allahabad, Allahabad 211002, India.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2010 Sep 1;76(5):523-30. doi: 10.1016/j.saa.2010.04.018. Epub 2010 Apr 22.
Mn(2+) doped ZnS nanoparticles are characterized using UV-vis, photoluminescence and photoconductivity studies. The size of Mn(2+) doped ZnS NPs is estimated to be 2-4nm by X-ray diffraction. UV-vis spectra show a blue shift in absorption edge as compared to bulk counterpart. Photoluminescence spectra indicate that orange luminescence varies with Mn(2+) concentration. The Mn(2+) doped ZnS nanoparticles are found to be photosensitive. The doping of Mn(2+) ions improves the photosensitivity of the ZnS nanoparticles system. The time-resolved rise and decay of photocurrent indicate anomalous behavior during steady state illumination.
采用紫外-可见吸收光谱、光致发光光谱和光电导谱对 Mn(2+)掺杂的 ZnS 纳米粒子进行了表征。X 射线衍射表明，Mn(2+)掺杂的 ZnS NPs 的尺寸估计为 2-4nm。与体相比，紫外-可见吸收光谱显示吸收边发生蓝移。光致发光光谱表明，橙色发光随 Mn(2+)浓度而变化。Mn(2+)掺杂的 ZnS 纳米粒子被发现具有光敏性。Mn(2+)离子的掺杂提高了 ZnS 纳米粒子体系的光敏性。光电流的时间分辨上升和衰减表明在稳态光照下出现异常行为。
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