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

121 Scopus citations


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
Issue number12
StatePublished - 2007

Bibliographical note

Funding Information:
This material is based on work supported by the NSF under NIRT program under Grant No. CBET 0506672 and the Minnesota IREE program under Grant No. LG-C5-2005. One of the authors (J.E.B) was supported through a NSF-IGERT fellowship under Grant No. DGE-0114372.


Dive into the research topics of 'Electron transport and recombination in polycrystalline TiO<sub>2</sub> nanowire dye-sensitized solar cells'. Together they form a unique fingerprint.

Cite this