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Effect of concentration of cadmium sulfate solution on structural,optical and electric properties of Cd1-xZnxS thin films
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  • Yuming Xue,
  • Shipeng Zhang,
  • Dianyou Song,
  • Liming Zhang,
  • Xinyu Wang,
  • Lang Wang,
  • Hang Sun
Yuming Xue
Tianjin University of Technology
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Shipeng Zhang
Tianjin University of Technology
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Dianyou Song
Tianjin University of Technology
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Liming Zhang
Tianjin University of Technology
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Xinyu Wang
Tianjin University of Technology
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Lang Wang
Tianjin University of Technology
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Hang Sun
Tianjin University of Technology
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Abstract

Cd1-xZnxS thin films were deposited by chemical bath deposition (CBD) on glass substrate to study the influence of cadmium sulfate concentration on the structural characteristics of the thin film. The SEM results show that the thin film surfaces under the cadmium sulfate concentration of 0.005 M exhibit better compactness and uniformity. Due to the less Cd2+ involved in the reaction and little precipitation in the solution. The distribution diagrams of thin film elements illustrate that the film growth rate changes on the increase, decrease, and increase with the increase of cadmium sulfate concentration. XRD studies exhibit the crystal structure of the film is hexagonal phase, and there are obvious diffraction peaks and better crystallinity when the concentration is 0.005 M. Spectrophotometer test results demonstrate that the relationship between zinc content x and optical band gap value Eg can be expressed by the equation Eg(x)=0.59x2+0.69x+2.43. Increasing the zinc content can increase the optical band gap, the absorbance of the thin film can be improved by decreasing the cadmium sulfate concentration, however, all of them have good transmittance. At a concentration of 0.005 M, the thin film has good absorbance in the 300 - 800 nm range, 80% transmittance, and band gap value of 3.24 eV, which is suitable for use as a buffer layer for solar cells.

Peer review status:IN REVISION

06 Apr 2021Submitted to Engineering Reports
07 Apr 2021Assigned to Editor
07 Apr 2021Submission Checks Completed
12 Apr 2021Reviewer(s) Assigned
21 May 2021Editorial Decision: Revise Major