Effect of iodine incorporation on characteristic properties of cadmium telluride deposited in aqueous solution

OJO, A. A. and DHARMADASA, I (2018). Effect of iodine incorporation on characteristic properties of cadmium telluride deposited in aqueous solution. Journal of Electronic Materials, 47 (11), 6909-6917.

[img]
Preview
PDF
Dharmadasa-EffectOfIodineINcorporationOnCharacteric(AM).pdf - Accepted Version
All rights reserved.

Download (1MB) | Preview
Link to published version:: https://doi.org/10.1007/s11664-018-6616-8
Related URLs:

    Abstract

    The electrodeposition of polycrystalline I-doped CdTe was successfully performed from aqueous solutions containing cadmium nitrate (Cd(NO3)2 and tellurium oxide (TeO2). The effects of different I-doping concentrations in the electrolytic bath on the deposited CdTe layers deposited were evaluated structurally, optically, morphologically and electronically using X-ray diffraction (XRD), ultraviolet-visible spectrophotometry, scanning electron microscopy, photoelectrochemical cell measurement and direct-current (DC) conductivity test respectively. The XRD show reduction in the (111) cubic CdTe peak intensity and the calculated crystallite size of the CdTe:I layers above 5 ppm I-doping. At I-doping of 1000 ppm of the CdTe-bath and above, the deposition of only crystalline Te due to the formation of Cd-I complexes debarring the deposition of Cd and co-deposition of CdTe in aqueous solution was observed. Morphologically, reductions in grain size were observed above 5 ppm I-doping with high pinhole density and the formation of cracks within the CdTe:I layers. For the as-deposited CdTe:I layers, conduction type remained n-type across all the explored I-doping concentration of 200 ppm. For the CdCl2 and Ga2(SO4)2+CdCl2 treated CdTe:I layers, the transition from n- to p-type conductivity was observed for the CdTe:I baths doped with 20 ppm and above due to the reduced cadmium deposition on the substrate. The highest conductivity was observed at 5 ppm I-doping of the CdTe-bath. Observations made on the CdTe:I in aqueous solution differs from the non-aqueous solvent documented in the literature. These results are reported systematically in this communication.

    Item Type: Article
    Research Institute, Centre or Group - Does NOT include content added after October 2018: Materials and Engineering Research Institute > Thin Films Research Centre > Electronic Materials and Sensors Research Group
    Identification Number: https://doi.org/10.1007/s11664-018-6616-8
    Page Range: 6909-6917
    Depositing User: Jill Hazard
    Date Deposited: 23 Aug 2018 13:10
    Last Modified: 31 Aug 2019 01:18
    URI: http://shura.shu.ac.uk/id/eprint/22361

    Actions (login required)

    View Item View Item

    Downloads

    Downloads per month over past year

    View more statistics