Microwave photoconductivity, photovoltaic properties and architecture of apolymer-semiconductor nanocrystal composite

Authors
Salafsky, JS Kerp, H Schropp, REI
Citation
Js. Salafsky et al., Microwave photoconductivity, photovoltaic properties and architecture of apolymer-semiconductor nanocrystal composite, SYNTH METAL, 102(1-3), 1999, pp. 1256-1258
Citations number
4
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SYNTHETIC METALS
ISSN journal
03796779 → ACNP
Volume
102
Issue
1-3
Year of publication
1999
Pages
1256 - 1258
Database
ISI
SICI code
0379-6779(199906)102:1-3<1256:MPPPAA>2.0.ZU;2-5
Abstract
We have studied composites of poly(p-phenylenevinylene) (PPV) and TiO2 nano crystals with a time-resolved microwave conductivity technique, Rutherford backscattering, and photocurrent/photovoltage measurements. Photovoltaic de vices of the structure (Al/PPV:TiO2 composite/ITO) exhibit a photocurrent w hich we suggest is due to both exciton generation in the polymer and free c arrier generation above the bandgap in the TiO2 nanocrystals. The quantum y ield of the latter part of the photocurrent is significantly higher (>10% a bove 3.4 eV) than for that part due to exciton generation in the polymer (1 -2% between 2.4 and 2.7 eV).