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Electron and Hole Transport through Mesoporous TiO 2 Infiltrated with Spiro‐MeOTAD
Author(s) -
Snaith H. J.,
Grätzel M.
Publication year - 2007
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200602085
Subject(s) - electron transport chain , materials science , mesoporous material , electron , diffusion , component (thermodynamics) , electron mobility , nanotechnology , chemical physics , chemical engineering , optoelectronics , physics , chemistry , thermodynamics , biochemistry , quantum mechanics , engineering , catalysis
Charge transport in a solid‐state dye‐sensitized solar cell is investigated. Unexpectedly, hole transport in the organic component (Spiro‐MeOTAD) is faster than the electron transport in the inorganic component (TiO 2 ). The electron mobility or diffusion coefficient through TiO 2 does not increase with increasing illumination intensity, as would be predicted by the multitrapping model for electron transport. The results highlight that poor electron transport in TiO 2 is a key issue for further improvements in device performance.