Increased conversion efficiency in cadmium telluride photovoltaics by luminescent downshifting with quantum dot/poly(methyl methacrylate) films

Simon Hodgson, William Brooks, Andrew Clayton, Giray Kartopu, Daniel Lamb, Vincent Barrioz, Stuart Irvine

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Commercially available quantum dots have been encapsulated in a poly(methyl methacrylate) film and used as a luminescent downshifting layer on cadmium sulfide/cadmium telluride photovoltaic devices. Application of these films has resulted in a relative improvement to the short-circuit current of over 4% by I–V measurement, with a significant increase in the contribution of short-wavelength light resulting in 25% of the current available in this part of the spectrum being captured. The films have been shown to be highly scattering and the associated difficulties this provides to external quantum efficiency measurements have been discussed. A range of optical characterisation techniques, particularly laser beam induced current, have been used to probe the effect the films have on a cadmium sulfide/cadmium telluride device. An alternate methodology for performing external quantum efficiency measurements with the quantum dot films has been proposed.
Original languageEnglish
Pages (from-to)150-159
JournalProgress in Photovoltaics: Research and Applications
Volume23
Issue number2
DOIs
Publication statusPublished - Feb 2015

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