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The effect of composition on structural and optical properties of ZnSealloys

مؤلف البحث
M.A. Abdel-Rahim , M.M.Hafiz , A.Elwhab.B.Alwany
ملخص البحث

Bulk ofZnxSe100x (x¼10, 20and40at%)waspreparedbytheusualquenchmelttechnique.Thinfilms
of thesecompositionswerepreparedbythermalevaporation.Differentialthermalanalyses(DTA)on
powder samplesundernon-isothermalconditionsshowthattheglasstransitiontemperature Tg
increasedandcrystallizationtemperature Tp decreasedwithincreasingZncontent.Theaverageparticle
size ofthecrystallineZnSephasededucedfromX-raydiffraction(XRD)patternsshowadecreasewith
increasingZncontent.Theseresultswereconfirmedwiththeresultsobtainedbyscanningelectron
microscopy(SEM).
The opticalpropertiesofZnxSe100x have beenstudiedatawavelengthrange(300–900nm),andit
was foundthattheopticalbandgap(Eg) increaseswithincreasingZnconcentrationintheZnxSe100x
system. TheresultscanbeinterpretedonthebasisofthechemicalbondapproachproposedbyBicermo
and Ovshinsky.Thevalueoftheextinctioncoefficient(k) decreaseswithincreasingwavelengthandZn
content.
On theotherhand,theopticalenergygap(Eg) decreasedwithincreasingtheannealingtemperature
for Zn10Se90 thin films.TheseresultscanbeinterpretedbytheDavisandMottemodel.

قسم البحث
مجلة البحث
Optics & Laser Technology
المشارك في البحث
تصنيف البحث
1
عدد البحث
Vol.47
سنة البحث
2013
صفحات البحث
PP.88–94