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Study of effects of Mn2+ in Cds nanocrystals

机译:Mn2 +在Cds纳米晶体中的作用研究

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Mn 2(+)-doped US nanocrystals have been synthesized by adopting an aqueous solution precipitation method. These nanocrystals have been studied using X-ray diffraction (XRD), X-ray fluorescence (XRF), optical absorbance, photolurninescence (PL), DC electrical conductivity measurements and positron annihilation lifetime spectroscopy (PALS). The system has been found to be in the hexagonal phase. PL spectra have been studied on most prominent exciton peaks within the wavelength range (586-731 nm). The emission intensity is found to increase on increasing Mn 21 ion concentration (0-5%). Electrical conductivity lies within 0.819 X 10(-6) to 1.69 x 10(-6)ohm(-1)m(-1) and the system shows power law dependence for n = 3-3.77. The Cd vacancies concentration has been found to decrease on increasing Mn%. (C) 2007 Elsevier B.V. All rights reserved.
机译:Mn 2(+)掺杂的美国纳米晶体已通过采用水溶液沉淀法合成。这些纳米晶体已使用X射线衍射(XRD),X射线荧光(XRF),吸光度,光致发光(PL),直流电导率测量和正电子an没寿命光谱(PALS)进行了研究。已经发现该系统处于六方相。已经对波长范围(586-731 nm)内最突出的激子峰进行了PL光谱研究。发现发射强度随着Mn 21离子浓度(0-5%)的增加而增加。电导率在0.819 X 10(-6)到1.69 x 10(-6)ohm(-1)m(-1)之间,并且系统显示出对于n = 3-3.77的功率定律依赖性。已经发现,随着Mn%的增加,Cd的空位浓度降低。 (C)2007 Elsevier B.V.保留所有权利。

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