Swift heavy ion induced phase transition in CdTe films deposited by spray pyrolysis in presence of electric field

CdTe polycrystalline thin films possessing hexagonal phase regions are obtained by spray deposition in presence of a high electric field. Thin film samples are irradiated with 100 MeV Ag ions using Pelletron accelerator to study the swift heavy ion induced effects. The ion irradiation results in the...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2009-08, Vol.267 (15), p.2480-2483
Main Authors: Ison, V.V., Ranga Rao, A., Dutta, V., Kulriya, P.K., Avasthi, D.K.
Format: Article
Language:English
Subjects:
Cadmium telluride
Electric field
Heavy ion irradiation
Phase transformation
Spray pyrolysis
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Summary:CdTe polycrystalline thin films possessing hexagonal phase regions are obtained by spray deposition in presence of a high electric field. Thin film samples are irradiated with 100 MeV Ag ions using Pelletron accelerator to study the swift heavy ion induced effects. The ion irradiation results in the transformation of the metastable hexagonal regions in the films to stable cubic phase due to the dense electronic excitations induced by beam irradiation. The phase transformation is seen from the X-ray diffraction patterns. The band gap of the CdTe film changes marginally due to ion irradiation induced phase transformation. The value changes from 1.47 eV for the as deposited sample to 1.44 eV for the sample irradiated at the fluence 1 × 10 13 ions/cm 2. The AFM images show a gradual change in the shape of the particles from rod shape to nearly spherical ones after irradiation.
ISSN:0168-583X
1872-9584
DOI:10.1016/j.nimb.2009.05.069