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Properties of PbS thin films grown on glass and layered GaSe crystal substrates by chemical bath deposition    
Yazarlar
Dr. Öğr. Üyesi Güventürk UĞURLU Dr. Öğr. Üyesi Güventürk UĞURLU
Gebze Teknik Üniversitesi, Türkiye
Doç. Dr. Hüseyin ERTAP Doç. Dr. Hüseyin ERTAP
Kafkas Üniversitesi, Türkiye
G. M. Mamedov
Dr. Öğr. Üyesi Güventürk UĞURLU Dr. Öğr. Üyesi Güventürk UĞURLU
Kafkas Üniversitesi, Türkiye
Mustafakemal Öztürk
Türkiye
Özet
PbS thin films were grown on glass and GaSe crystal substrates by chemical bath deposition and their structural, morphological, optical, and electrical properties were investigated. PbS films grew in cubic structure with lattice constants equal to 5.9315 Aand 5.9362 ̊A for films grown on glass and GaSe crystal, respectively. The band gaps of the PbS films were determined to be 1.60 eV. The long wavelength tails of absorption spectra showed exponential dependence on the incident photon energy according to the Urbach Martiensen model. Electrical properties of PbS films were investigated by the van der Pauw method, which showed that PbS films were p and n type depending on the temperature. At low temperatures, the p-type conductivities of PbS thin films grown on glass and GaSe substrates were found to be due to the ionization of acceptor centers with energies of 94.50 meV and 36.50 meV, respectively, while at higher temperatures the n-type conductivities were found to be determined by the ionization of donor centers with energies of 226.50 meV and 310 meV, respectively. The sheet charge carrier concentration and mobility of PbS film grown on GaSe substrate were, in general, higher than those of films grown on glass substrate.
Anahtar Kelimeler
Makale Türü Özgün Makale
Makale Alt Türü Ulusal alan endekslerinde (TR Dizin, ULAKBİM) yayımlanan tam makale
Dergi Adı TURKISH JOURNAL OF PHYSICS
Dergi ISSN 1300-0101
Dergi Tarandığı Indeksler TR DİZİN
Makale Dili İngilizce
Basım Tarihi 01-2014
Cilt No 38
Sayfalar 104 / 110
Doi Numarası 10.3906/fiz-1301-1
Makale Linki http://dx.doi.org/10.3906/fiz-1301-1