A study of the physical properties of sprayed CdS thin films

Alaee, M. S.; Rouhani, M. Djafari

doi:10.1007/bf02655629

Cited by 7 publications

(8 citation statements)

References 4 publications

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“…The optical transmittance, reflectance and energy gap of CdS film as printed and those which sintered at 400 o C and at 600 o C were studied in the range from (200 -1000 nm), the results are shown in Figs. [1], [2], [3], and [4]. Generally, a sharp increase in the spectra at ~510 nm (~ 2.4 eV) is in agreement with the reported band edge of CdS, but higher values of transmittance and lower values of reflectance were observed in the transmission and reflection spectra for as-printed CdS film.…”

Section: Resultssupporting

confidence: 84%

Effect of doping and sintering temperature on the optical characterization of CdS films prepared by screen printing technique

Ali,

Moqbel,

Habib

2015

Univ. Aden J. Nat. and Appl. Sc.

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Two sets of CdS films, doped and undoped films by screen printing technique, were prepared and investigated by UV-Visible spectrophotometer. The undoped as-printed films showed high transmittance (90%) and lower reflectance (10%), while the films sintered at 400◦C and 600◦C showed less transmittance (60%) and little increase in reflectance (20%), the band gap energy of these films have decreased from 2.44 eV to 2.35 eV with an increase in the sintering temperature. The Doped films showed (70%) transmittance and reflectance of (20%) and increase in the band gap energy up to 3.45 eV. These results nominates the CdS films to be used as n-type window layer in solar cells. Other optical constants like refractive index (n), extinction coefficient value (K) and dielectric values have been calculated.

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Section: Resultssupporting

confidence: 84%

Effect of doping and sintering temperature on the optical characterization of CdS films prepared by screen printing technique

Ali,

Moqbel,

Habib

2015

Univ. Aden J. Nat. and Appl. Sc.

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“…Moreover, the nitrogen-grown film contains more oxygen because it has more tin which is better able to getter the oxygen, it contains more tin since the tin bath is not coated by a protective oxide film. That having a metal present which can getter oxygen increases the oxygen content, was also observed by Alaee and Rouhani (10), who found that films containing much indium also contained more oxygen. The tin and the extra oxygen present in the nitrogen grown films could also be responsible for the greater difficulty in making ohmic contacts to them.…”

Section: Our Resistivity Data S U P P O R T T H E S U G G E S T I O N...supporting

confidence: 65%

“…Others have also determined that the films contain an excessive amount of chlorine (6,10). We were unable to determine in what form the chlorine was present.…”

Section: Our Resistivity Data S U P P O R T T H E S U G G E S T I O N...mentioning

confidence: 84%

“…Further, the effect can be enhanced by heating in air (2,3), or an oxygen atmosphere (9), and it can be reduced by heating for 5 min at 400~ in H~ or by heating in a vacuum or a nitrogen ambient. That the SP films do contain a substantial amount of oxygen has been shown by Auger studies (10). Also, the authors concluded that the oxygen contamination was a direct result of growing the films in air.…”

mentioning

confidence: 84%

“…The hot plate was set such that the surface of the glass substrate resting on top of the tin bath was 340~ when there was no spray present. This temperature was chosen because Ma and Bube (3) determined that the conductivity at this substrate temperature is at a local maximum, and other investigators have used a similar deposition temperature (4,10).…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

CdS Films Grown by Spray Pyrolysis in an N 2 Ambient

Shirreffs

Cheng

Geib

et al. 1984

J. Electrochem. Soc.

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normalCdS films were grown by spray pyrolysis in a nitrogen atmosphere in an attempt to reduce the oxygen contamination and therefore the resistivity. This would reduce the loss due to series resistance in solar cells fabricated from them. It was determined that the oxygen contamination could not be reduced in this way due to the fact that a major source of oxygen is the solvent, water. Further, the films were found to contain more chlorine, carbon, and, in some instances, tin than was previously thought. It is suggested that these impurities are responsible for the resistivity of SP films being more strongly affected by oxygen adsorption than are vapor deposited or sintered films, and the resistivity of SP films being extremely sensitive to the deposition temperature of the film.

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Properties of Thin Films for Solar Cells

Chopra

Das

1983

Thin Film Solar Cells

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A study of the physical properties of sprayed CdS thin films

Cited by 7 publications

References 4 publications

Effect of doping and sintering temperature on the optical characterization of CdS films prepared by screen printing technique

Effect of doping and sintering temperature on the optical characterization of CdS films prepared by screen printing technique

CdS Films Grown by Spray Pyrolysis in an N 2 Ambient

Properties of Thin Films for Solar Cells

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