Spray deposited thin films of SnO2: F/CdS: In bilayers produced using different fluorine sources: NH4F and HF

Year 2019, Volume: 3 Issue: 3, 111 - 122, 30.09.2019

Shadia Ikhmayies

https://doi.org/10.30521/jes.605085

Cited By: 4

Abstract

Thin films SnO2: F/CdS: In bilayers were prepared using the
spray pyrolysis method on glass substrates at a substrate temperature Ts
= 450 °C. Ammonium fluoride (NH4F) and hydrofluoric acid (HF) were
both used as the fluorine sources in the precursor solution of SnO2:
F. Properties of the two types of bilayers obtained using the two fluorine
sources were investigated. X-ray diffraction (XRD), scanning electron
microscopy (SEM) and transmittance measurements (UV-Vis) were used to
characterize the films. It is found that the bilayers prepared using HF as a
source of fluorine have more ordered crystal growth, and sharper absorption
edge. From the inspection of the first derivative of the absorbance it is
expected that more interdiffusion on the SnO2: F/CdS: In interface
takes place in the bilayers produced using HF. These results confirm that these
bilayers are better as fore contacts for thin film CdS/CdTe solar cells.

Keywords

Spray pyrolysis , Thin films , CdS/CdTe thin film solar cells , Transparent conducting oxides , Cadmium compounds

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