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APCVD of dual layer transparent conductive oxides for photovoltaic applications

Yates, HM, Gaskell, JM, Thomson, ME, Sheel, DW, Delaup, B and Morales-Masis, M 2015, 'APCVD of dual layer transparent conductive oxides for photovoltaic applications' , Thin Solid Films, 590 , pp. 260-265.

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We report the atmospheric pressure chemical vapour deposition (APCVD) of a dual layer transparent conductive oxide (TCO). This combines a fluorine doped tin oxide (FTO) base layer with a fluorine doped zinc oxide (FZO) top layer, where we seek to utilise the respective advantages of each material and the differences in their associated industrial deposition process technologies. Deposition of a 250 nm thick FZO layer on FTO was enough to develop features seen with FZO only layers. The crystallographic orientation determined by the FZO dopant concentration. Changes to the deposition parameters of the underlying FTO layer effected stack roughness and carrier concentration, and hence optical scattering and absorption. Photovoltaic cells have been fabricated using this TCO structure showing promising performance, with efficiencies as high as 10.21% compared to reference FTO only values of 9.02%. The bulk of the coating was FTO, providing the majority of conductivity and the large surface features associated with this material, whilst keeping the overall cost low by utilising the very fast growth rates achievable. The FTO was capped with a thinner FZO layer to provide a top surface suitable for wet chemical or plasma etching, allowing the surface morphology to be tuned for specific applications.

Item Type: Article
Uncontrolled Keywords: zinc oxide; tin oxide; atmospheric pressure chemical vapour deposition; PV
Themes: Energy
Schools: Schools > School of Computing, Science and Engineering > Salford Innovation Research Centre (SIRC)
Journal or Publication Title: Thin Solid Films
Publisher: Elsevier
Refereed: Yes
ISSN: 0040-6090
Related URLs:
Funders: EU
Depositing User: HM Yates
Date Deposited: 24 Aug 2015 15:02
Last Modified: 29 Oct 2015 00:10

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