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Issue 10, 2010
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Zn(II) versus Ru(II) phthalocyanine-sensitised solar cells. A comparison between singlet and triplet electron injectors

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Abstract

In this study, the injection efficiencies and photovoltaic device performances for two different phthalocyanine sensitisers—a Zn(II)Pc (TT-1) and a Ru(II)Pc (TT-35) in dye sensitized photoelectrochemical solar cells were compared. These dyes have similar structures and energetics, but differ significantly in their photophysics, with TT-1 exhibiting a reasonably long lived singlet state, whilst TT-35 exhibits rapid intersystem crossing to a long lived triplet state. Time correlated single photon counting (TCSPC) approach and incident photon conversion efficiency (IPCE) measurements were applied to study the injection efficiency of these two Pc dyes. A comparison of the injection efficiency determined by the two independent techniques, TCSPC and IPCE analysis, shows a good agreement. TT-35 shows higher injection efficiency in comparison to TT-1. This result is consistent with the relative energy and lifetime of the TT-35 triplet state compared to the TT-1 singlet excited state. The high injection efficiency and the long electron diffusion length shown by TT-35 make this dye an interesting red absorbing sensitizer for dye solar cells.

Graphical abstract: Zn(ii) versus Ru(ii) phthalocyanine-sensitised solar cells. A comparison between singlet and triplet electron injectors

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Publication details

The article was received on 19 May 2010, accepted on 21 Jun 2010, published on 11 Aug 2010 and first published online on 11 Aug 2010


Article type: Paper
DOI: 10.1039/C0EE00083C
Citation: Energy Environ. Sci., 2010,3, 1573-1579
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    Zn(II) versus Ru(II) phthalocyanine-sensitised solar cells. A comparison between singlet and triplet electron injectors

    A. Listorti, I. López-Duarte, M. V. Martínez-Díaz, T. Torres, T. DosSantos, P. R. F. Barnes and J. R. Durrant, Energy Environ. Sci., 2010, 3, 1573
    DOI: 10.1039/C0EE00083C

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