Micro-Crystallographic, Optical and Transport Studies of Cd0.7  Zn0.3  Se : Sb Thin Films

D. S. SUTRAVE; G. S. SHAHANE

Makale detayları

Micro-Crystallographic, Optical and Transport Studies of Cd0.7 Zn0.3 Se : Sb Thin Films

Yazarlar:

D. S. SUTRAVE | G. S. SHAHANE

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Physics 2002 Vol.26 Issue 2, pp.101-108

Belge Tipi:

Makale

Yayın Tarihi:

1/2002

Belge Dili:

Türkçe

Document ID (Org No.):

2000762224

Sıklık:

İki Aylık

eISSN:

1303-6122

pISSN:

1300-0101

Anahtar kelimeler:

Özet:

 

Cd1-xZnxSe thin film structures doped with various  concentrations of trivalent antimony were chemically deposited onto  glass-substrates.  These structures were then characterised through  the XRD, SEM, optical and electrical characterization techniques.  The  X-ray diffractograms of both as-prepared and Sb-doped samples were  obtained and analysed.  The analysis revealed that the samples are  microcrystalline over the whole range of the doping concentration (0  to 2 mol %).  It is striking that the intensities of hexagonal and  cubic reflections of CdSe went on increasing with doping concentration  upto 0.1 mol % and decreased with further increase in Sb3+   content in the film whereas peak intensities corresponding to cubic  ZnSe remained almost constant.  The optical studies showed a little  shift in the absorption edge, typically from 600 nm to 650 nm for the  change of Sb concentration from 0 to 0.1 mol % .  The optical  transitions are found to be of the direct type with the values of m  nearly 0.5 for all films.  The electrical transport studies showed increase in the conductivity  with doping concentration up to 0.1 mol % and the conductivity  decreased for further increase in the doping concentration.  Typically  the conductivity improved by an order at 450 K whereas these changes  are more significant at around 300 K. The thermo-power measurements  gave n-type conduction of the samples and the variation of  thermoelectric power with temperature is nonlinear.  Other film  characteristics, namely activation energy of an electrical conduction,  carrier concentration, mobility and intercrystalline barrier  potential, were determined from these observations and their  temperature and composition dependence have been examined.

 

Cd1-xZnxSe thin film structures doped with various  concentrations of trivalent antimony were chemically deposited onto  glass-substrates.  These structures were then characterised through  the XRD, SEM, optical and electrical characterization techniques.  The  X-ray diffractograms of both as-prepared and Sb-doped samples were  obtained and analysed.  The analysis revealed that the samples are  microcrystalline over the whole range of the doping concentration (0  to 2 mol %).  It is striking that the intensities of hexagonal and  cubic reflections of CdSe went on increasing with doping concentration  upto 0.1 mol % and decreased with further increase in Sb3+   content in the film whereas peak intensities corresponding to cubic  ZnSe remained almost constant.  The optical studies showed a little  shift in the absorption edge, typically from 600 nm to 650 nm for the  change of Sb concentration from 0 to 0.1 mol % .  The optical  transitions are found to be of the direct type with the values of m  nearly 0.5 for all films.  The electrical transport studies showed increase in the conductivity  with doping concentration up to 0.1 mol % and the conductivity  decreased for further increase in the doping concentration.  Typically  the conductivity improved by an order at 450 K whereas these changes  are more significant at around 300 K. The thermo-power measurements  gave n-type conduction of the samples and the variation of  thermoelectric power with temperature is nonlinear.  Other film  characteristics, namely activation energy of an electrical conduction,  carrier concentration, mobility and intercrystalline barrier  potential, were determined from these observations and their  temperature and composition dependence have been examined.

Makale detayları

Micro-Crystallographic, Optical and Transport Studies of Cd0.7 Zn0.3 Se : Sb Thin Films

Yazarlar:

D. S. SUTRAVE | G. S. SHAHANE

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Physics 2002 Vol.26 Issue 2, pp.101-108

Belge Tipi:

Makale

Yayın Tarihi:

1/2002

Belge Dili:

Türkçe

Document ID (Org No.):

2000762224

Sıklık:

İki Aylık

eISSN:

1303-6122

pISSN:

1300-0101

Turk. J. Phys.

26

(2002)

101-108. Full text: pdf Other articles published in the same issue: Turk. J. Phys.

vol.26

iss.2.

Sayı

Makale detayları

Micro-Crystallographic, Optical and Transport Studies of Cd0.7 Zn0.3 Se : Sb Thin Films

Yazarlar: D. S. SUTRAVE | G. S. SHAHANE

Yayıncı: TUBITAK

Dergi: Turkish Journal of Physics 2002 Vol.26 Issue 2, pp.101-108

Belge Tipi: Makale

Yayın Tarihi: 1/2002

Belge Dili: Türkçe

Document ID (Org No.): 2000762224

Sıklık: İki Aylık

eISSN: 1303-6122

pISSN: 1300-0101

Turk. J. Phys.

26

(2002)

101-108. Full text: pdf Other articles published in the same issue: Turk. J. Phys.

vol.26

iss.2.

Sayı

Yazarlar:

D. S. SUTRAVE | G. S. SHAHANE

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Physics 2002 Vol.26 Issue 2, pp.101-108

Belge Tipi:

Makale

Yayın Tarihi:

1/2002

Belge Dili:

Türkçe

Document ID (Org No.):

2000762224

Sıklık:

İki Aylık

eISSN:

1303-6122

pISSN:

1300-0101