A research on growth and characterization of CdS:Eu thin films
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Tarih
2019
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer Heidelberg
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Chemical spray pyrolysis-grown CdS thin films including various quantities of Eu atoms (from 0 to 10at.%) were synthesized on glass slides. The detailed physical properties of the produced CdS and CdS:Eu thin films were explored. Structural analysis showed that Eu-doping enhanced the crystal quality of CdS thin films until 10at.% Eu-doping and further Eu-doping treatment led to a distortion in the CdS structure. In addition, the crystallite sizes of CdS thin films dropped from 36.2 to 32.4nm as Eu-doping level increased to 10at.%. Morphological data showed that increasing Eu-doping remarkably varied the surface morphology of CdS thin films forming smaller grains. Chemical content examinations approved the presence of Eu atoms in CdS structure. From the optical measurements, it was obtained that more transparent CdS thin films with a maximum transmittance of 68% at 820nm were created after 10at.% Eu-doping and bandgap values of samples reduced from 2.58 to 2.47eV with rising of Eu-doping from 0 to 10at.%. Room temperature photoluminescence data demonstrated the formation of two essential peaks for all the samples, which are in turn related to green and yellow bands. Electrical investigation pointed out that Eu-doping enhanced the carrier density of CdS thin films from 4.38 x 10(13) cm(-3) to 2.46 x 10(14) cm(-3) and dropped the resistivity of CdS samples from 2.59 x 10(4) cm to 5.85 x 10(3) cm until 6at.% and further increment of Eu-doping paved the way to get worse electrical data. Thus, it can be brought a conclusion that Eu-doping not only improved the optical properties of CdS thin films, but also restored the electrical properties, which are able to use in the opto-electronic devices.
Açıklama
Anahtar Kelimeler
Room-Temperature Ferromagnetısm, Doped Zno, Optıcal-Propertıes, Solar-Cell, Physıcal-Propertıes, Photolumınescence Propertıes, Eu, Nanopartıcles, Co, Nanocrystals
Kaynak
Applied Physics A-Materials Science & Processing
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
125
Sayı
1
