%0 Journal Article
%A Morandeira Ramírez, Ana 
%A López Duarte, Ismael
%A Martínez Díaz, María Victoria
%A O'Regan, Brian 
%A  Shuttle, Chris
%A Haji-Zainulabidin, Nor A. 
%A Torres Cebada, Tomás 
%A Palomares Gil, Emilio 
%A Durrant, James Robert 
%T Slow Electron Injection on Ru−Phthalocyanine Sensitized TiO2
%D 2007
%@ 0002-7863
%U https://hdl.handle.net/20.500.14352/100092
%X Photoinduced electron injection in dye sensitized TiO2 is a critical step in the function of dye sensitized solar cells. High electron injection quantum yields are a requirement to obtain efficient devices. While high electron injection quantum yields are usually linked to ultrafast electron-transfer dynamics (in the fs−ps timescales), the latter are not a requirement. We present here a system, Ru-phthalocyanine sensitized TiO2, where slow electron injection (kinj ≈ 450 ns-1) and efficient electron injection are compatible owing to the long lifetime of the injecting state, the Ru-phthalocyanine triplet state. Ru-phthalocyanine dyes are attractive sensitizers because they absorb strongly in the red and their axial ligands hinder the formation of aggregates.
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