4.6 Review

Scientific complications and controversies noted in the field of CdS/CdTe thin film solar cells and the way forward for further development

Journal

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume 30, Issue 23, Pages 20330-20344

Publisher

SPRINGER
DOI: 10.1007/s10854-019-02422-6

Keywords

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Funding

  1. Sheffield Hallam University
  2. British Council
  3. Commonwealth Scholarship Commission
  4. DTI-UK
  5. University Alliance-UK
  6. CARA
  7. Malaysian Government
  8. Kurdistan Government
  9. Libyan Government
  10. Nigerian Government
  11. EPSRC

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Cadmium telluride-based solar cell is the most successfully commercialised thin film solar cell today. The laboratory-scale small devices have achieved 22%, and commercial solar panels have reached 18% conversion efficiencies. However, there are various technical complications and some notable scientific contradictions that appear in the scientific literature published since the early 1970s. This review paper discusses some of these major complications and controversies in order to focus future research on issues of material growth and characterisation, post-growth processing, device architectures and interpretation of the results. Although CdTe can be grown using more than 14 different growth techniques, successful commercialisation has been taken place using close-space sublimation and electrodeposition techniques only. The experimental results presented in this review are mainly based on electrodeposition. Historical trends of research and commercial successes have also been discussed compared to the timeline of novel breakthroughs in this field. Deeper understanding of these issues may lead to further increase in conversion efficiencies of this solar cell. Some novel ideas for further development of thin film solar cells are also discussed towards the end of this paper.

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