Study The Effect of Thickness on The Structural and Optical  constant of  CdSe Thin Films

T.H.Mahmoud,; B.K.Hassun,; S.A.Make,

	Study The Effect of Thickness on The Structural and Optical constant of CdSe Thin Films
Journal of College of Education
Article 1, Volume 0, Issue 1, 2017, Pages 249-264
Authors
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Abstract
In this research , pure (CdSe) thin films with a different thickness ( 300 , 500 ,700 ,900) ± 20 nm was deposited on glass substrate in room temperature ( 300K ) with deposition rate (0.7±0.01) nm /sec by thermal evaporation under vacuum technique , and then studies their structure and optical properties . The resultant of the structural analysis showed that all films with all thickness prepared were polycrystalline in nature and have hexagonal type structure with atomic growth in three crystal orientation which it [002] , [102] and [103] with Preferred orientation along [002] plane for all Prepared films. The optical analysis measurement showed that all prepared films have absorption coefficient with a value larger than (∝ > 〖10〗^4 〖cm〗^(-1)) and this value was increased when increasing the film thickness especially in the visible range of electromagnetic spectrum , the optical energy gap was founded in the range ( 1.70 -1.72 ) eV.
Keywords
Cadmium Selenide; Optical and structural properties; Thermal evaporation under vacuum

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