The effects of coumarin additive on the properties of CdS thin films grown by chemical bath deposition
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Dosyalar
Tarih
2015
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Sci Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
CdS thin films have been obtained on glass substrates by using chemical bath deposition technique. Different concentrations of coumarin were used as an additive in the growth solutions, for the first time. The effects of coumarin on the properties of the as-deposited and annealed CdS thin films were investigated. It was found that increasing coumarin concentration in the growth solution remarkably affects the crystallinity and uniformity of the films. The 1% and 2% presence of coumarin enhanced the surface morphology while higher concentrations decreased surface uniformity. In the optical band gap values of both as-deposited and annealed films, a decrease has been observed with increasing additive concentration. Through temperature dependent resistance measurements of the films, impurity levels' electrical activation energies for each film have been estimated by means of the obtained discrete linear regions indicating different conduction mechanisms. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Açıklama
Anahtar Kelimeler
CdS, Chemical bath deposition, Additive, Coumarin
Kaynak
Ceramics International
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
41
Sayı
3
