Thin filmsofZn40Se60 were preparedbythevacuumthermalevaporationtechnique.Theinfluenceof
annealedtemperatureonthestructuralandopticalpropertieswasinvestigatedusingtheX-ray
diffraction(XRD),scanningelectronmicroscopy(SEM)andopticaltransmission.TheXRDstudiesshow
that theas-depositedfilmisamorphousinnature,butthecrystallinityimprovedwithincreasingthe
annealingtemperature.Furthermoretheparticlesizeandcrystallinityincreasedwhereasthedisloca-
tion andstrainsdecreasedwithincreasingtheannealingtemperature.SEMstudiesshowedthatthe
annealingtemperatureinducedchangesinthemorphologyoftheas-depositedsample.Variousoptical
constanthavebeencalculatedforas-depositedandannealedfilms.Themechanismoftheoptical
absorptionfollowstheruleofdirecttransition.Itwasfoundthat,theopticalenergygap(Eg) decreased
with increasingtheannealingtemperature.TheseresultscanbeinterpretedbytheDavisandMotte
model. Ontheotherhandthemaximumvalueoftherefractiveindex(n) isshiftedtowardthelong
wavelengthbyincreasingtheannealingtemperature.
ملخص البحث
قسم البحث
مجلة البحث
Optics &LaserTechnology
المشارك في البحث
تصنيف البحث
1
عدد البحث
Vol. 44
سنة البحث
2012
صفحات البحث
PP. 1116–1121