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Influence of Pb on structure, Optical and electrical properties of Zn1-XPbXS semiconductor compounds at low temperatures
Chemical Physics Letters ( IF 2.8 ) Pub Date : 2018-11-16 , DOI: 10.1016/j.cplett.2018.11.033
Y. Vasudeva Reddy , T. Mohan Kumar , T. Shekharam , M. Nagabhushanam

Zn1-XPbXS (x=0 to 0.4 in steps of 0.1) ternary semiconductor samples have been prepared by co-precipitation method. The structural, optical and electrical studies have been carried out on all these samples to understand the influence of Lead on these properties. X-ray diffractograms showed that all Zn1-XPbXS samples have polycrystalline nature with Hexagonal phase. The room temperature optical absorption studies revealed that energy gap decreases with increase of Pb in Zn1-XPbXS compounds. The temperature-dependent conductivity, measured in the range 300-4K, led to understand that the conduction mechanisms at 60K and 30K are different. The activation energies evaluated at low (300-60K) and very low temperature (60-30K) regions are 38.03-32.58meV and17.99-13.56meV respectively. Activation energy and conductivity of Zn1-XPbXS samples increase with the increase of Pb. The samples exhibited low freezing temperature points indicating the possibility of their use in low temperature device applications.



中文翻译:

铅对低温下Zn 1-X Pb X S半导体化合物的结构,光电性能的影响

通过共沉淀法制备了Zn 1-X Pb X S(x = 0至0.4,步长为0.1)三元半导体样品。已经对所有这些样品进行了结构,光学和电气研究,以了解铅对这些性能的影响。X射线衍射图表明,所有Zn 1-X Pb X S样品均具有六方相多晶性质。室温光吸收研究表明,Zn 1-X Pb X中的能隙随Pb的增加而减小S化合物。在300-4K范围内测得的随温度变化的电导率使人们了解到,在60K和30K时的传导机理是不同的。在低温(300-60K)和低温(60-30K)区域评估的活化能分别为38.03-32.58meV和17.99-13.56meV。Zn 1-X Pb X S样品的活化能和电导率随Pb的增加而增加。样品显示出较低的冷冻温度点,表明它们可能在低温设备应用中使用。

更新日期:2018-11-16
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