Thermal decomposition of solution processable metal xanthates on mesoporous titanium dioxide films: A new route to quantum-dot sensitised heterojunctions

T. Lutz, A. MacLachlan, A. Sudlow, J. Nelson, M.S. Hill, K.C. Molloy, S.A. Haque

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

We introduce a straightforward route to the fabrication of metal sulfide semiconductor (e.g. CdS, Sb 2S 3, Bi 2S 3) sensitised TiO 2 films. Our approach is based upon the controllable thermal decomposition of a single-source metal xanthate precursor on a mesoporous metal oxide film. The growth of the metal sulfide deposit is confirmed by Raman and UV-Vis steady-state absorption measurements. Transient absorption spectroscopy measurements provide evidence for charge separation across the metal sulfide/TiO 2 interface. Moreover, a high yield of long-lived photogenerated charges is observed in a three-component TiO 2/metal sulfide/spiro-OMeTAD film, thus demonstrating the potential of such multicomponent films for solar energy conversion devices.
Original languageEnglish
Pages (from-to)16192-16196
Number of pages5
JournalPhysical Chemistry Chemical Physics
Volume14
Issue number47
DOIs
Publication statusPublished - 14 Dec 2012

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