Hybrid ultra-thin metal films: An alternative to transparent conducting oxides for emerging photovoltaic technologies?

Oliver Hutter^a, Martin Tyler^a, Ross Hatton^a

^aUniversity of Warwick, Library Road, Coventry, CV4 7AL, United Kingdom

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)

Roma, Italy, 2015 May 11th - 13th

Organizer: Filippo De Angelis

Poster, Ross Hatton, 125
Publication date: 5th February 2015

Emerging thin film photovoltaics (e-TFPVs) processed at low temperature and from solution onto flexible substrates offer a path to a dramatic reduction in the environmental and monetary cost of manufacturing photovoltaics (PVs), and an expansion in the range of applications beyond those available to today’s flat plate PVs. The full potential of e-TFPVs can only be realised if the electrode that couples light into these devices is very low cost and compatible with flexible substrates, which rules out the use of conventional conducting oxide coated glass. This presentation will describe recent work by the Hatton group aimed at addressing this complex multi-faceted problem, including reference [1]. A new type of window electrode based on an ultra-thin metal film and spontaneously doped high refractive index sub-oxide over-layer will be described, that offers remarkable robustness, compatibility with flexible substrates, sub-9 Ohms sq^-1 sheet resistance, low work function (< 4 eV) and high transparency. The potential of these hybrid electrodes as the window electrode in e-TFPVs will be demonstrated and discussed.

[1] Hybrid Copper:Tungsten Suboxide Window Electrode for Organic Photovoltaics, O. S. Hutter, R. A. Hatton*, Adv. Mater. 2015, 27, 326-331.

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