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Imaging the photovoltaic response of PbS‐sensitized porous titania
Author(s) -
Turyanska L.,
Makarovsky O.,
Elfurawi U.,
Patanè A.,
Fay M. W.,
Bowers J. W.,
Upadhyaya H. M.
Publication year - 2011
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201127066
Subject(s) - materials science , photocurrent , photovoltaic system , photoluminescence , optoelectronics , schottky barrier , wavelength , schottky diode , lead sulfide , nanotechnology , visible spectrum , quantum dot , ecology , diode , biology
We report the photovoltaic response of solid‐state devices based on porous TiO 2 photosensitized with PbS nanocrystals. A photovoltaic response in the visible and near infrared wavelength range is obtained by exploiting the Schottky junction that forms at the interface between the PbS/TiO 2 film and a metallic contact. Spatial images of the photoluminescence and of the short circuit photocurrent signal reveal a non‐homogeneous response, which we explain in terms of the electron transfer dynamics at the PbS/TiO 2 interface and the morphological properties of TiO 2 .