Reference : Rocking disc electro-deposition of CuIn alloys, selenisation, and pinhole effect mini...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
http://hdl.handle.net/10993/6221
Rocking disc electro-deposition of CuIn alloys, selenisation, and pinhole effect minimisation in CISe solar absorber layers
English
Cummings, Charles Y. [University of Bath]
Zoppi, Guillaume [Northumbria University]
Forbes, Ian [Northumbria University]
Colombara, Diego mailto [University of Bath > Department of Chemistry]
Peter, Laurence M. [University of Bath > Department of Chemistry]
Marken, Frank [University of Bath > Department of Chemistry]
Sep-2012
Electrochimica Acta
Pergamon Press - An Imprint of Elsevier Science
79
141-147
Yes (verified by ORBilu)
International
0013-4686
[en] Solar cell ; CIS ; Copper indium diselenide ; Electrodeposition ; Photoelectrochemistry ; Recombination ; Pinhole ; Etching ; Hypochlorite ; Voltammetry
[en] The co-electrodeposition of copper and indium from a pH 3 tartrate bath onto 4.8 cm × 2.5 cm Mo and MoSe2 substrates is studied and conditions are optimised for CuIn alloy films. Selenisation at ca. 500 °C for 30 min in selenium vapour gives CuInSe2 (or CISe). Mapping using the photo-electrochemical reduction of Eu(NO3)3 is used to asses the relative photoactivity as a function of position and surface treatment.Etching of detrimental CuxSe phases is investigated with 5% and 0.5% (w/w) aqueous KCN. The slower 0.5% (w/w) KCN etch allows better process control, and re-annealing at 500 °C for 30 min followed by further etching significantly improved the photo-activity. However, over the large area local pinhole recombination effects are substantial. An alternative low temperature film optimisation method is proposed based on (i) KCN over-etch, (ii) hypochlorite (5%, w/w) pinhole removal (Mo etch), and (iii) a final KCN etch to give good and more uniform activity.
EPSRC
Researchers ; Professionals ; Students ; General public
http://hdl.handle.net/10993/6221
10.1016/j.electacta.2012.06.095
http://www.sciencedirect.com/science/article/pii/S0013468612010717

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