Electrical Conductivity, TEP and Mobility of (CdSe)1-x(ZnS)x Mixed Semiconductors
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Published:2012-06-20
Issue:1
Volume:9
Page:23-30
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ISSN:0973-3469
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Container-title:Material Science Research India
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language:
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Short-container-title:Mat Sci Res India
Author:
Yadaiah K.1,
Reddy Vasudeva2,
Nagabushanam M.2
Affiliation:
1. Sri Venkateswara College (U.G. and P.G.), Suryapet - 508 213 (India).
2. Department of Physics, Osmania University, Hyderabad - 500 007 (India).
Abstract
The Polycrystalline (CdSe)1-x(ZnS)x semiconductor powder with 0<=x<=1 was prepared by controlled co-precipitation method. Pellets made out of the powder, sintered at 800o C in nitrogen atmosphere was used for studies. Electrical conductivity of these samples increased with increasing the temperature from 77-300o K. At a given temperature an increase in conductivity with the increase in composition was observed in samples with x = 0.2 to 0.4 where as decrease in conductivity with the increase in composition occurs in samples with x = 0.7 to 1. For all samples, activation energies were calculated from the linear portions of log s vs 1000/T and the values range between 0.021 eV to 0.042 eV measurements of all samples are found to be negative, indicating n-type conduction in temperature region 77-300oK.From TEP and conductivity studies, carrier concentration and their mobilities were deduced and all the results were reported and suitable reasons were attributed for each observation made.
Publisher
Oriental Scientific Publishing Company
Subject
Pharmacology (medical),Complementary and alternative medicine,Pharmaceutical Science
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