Electron transport and recombination in polycrystalline TiO2 nanowire dye-sensitized solar cells

Emil Enache-Pommer, Janice E. Boercker, Eray S. Aydil

Research output: Contribution to journalArticlepeer-review

119 Scopus citations

Abstract

Electron transport and recombination time constants in dye-sensitized solar cells made from TiO2 nanowires were determined using transient photocurrent and photovoltage measurements. The magnitude of the electron transport time (10-2 to 10-3 s) and its dependence on the illumination intensity were similar to those reported for dye-sensitized solar cells made from TiO2 nanoparticles indicating that electron capture and release by surface traps determine transport times even in nanowires. However, the ratio of the electron recombination time to the electron collection time in nanowire solar cells was ∼150, larger than those observed in nanoparticle dye-sensitized solar cells.

Original languageEnglish (US)
Article number123116
JournalApplied Physics Letters
Volume91
Issue number12
DOIs
StatePublished - Sep 28 2007

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