期刊
ACS APPLIED MATERIALS & INTERFACES
卷 2, 期 1, 页码 219-229出版社
AMER CHEMICAL SOC
DOI: 10.1021/am900659v
关键词
water-soluble CdSe nanorods; ligand exchange; polythiophene; layer-by-layer; multilayer thin films; charge transfer
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC), NRC-NINT
- University of Alberta, Micralyne Inc, iCORE
- Canadian Foundation for Innovation
- Alberta Ingenuity Fund
- Killarn Foundation
Electrostatic layer-by-layer assembly was the basis for the synthesis of multilayer nanorod/polymer composite films. Cationic and water-soluble CdSe nanorods (NRs) were synthesized and partnered with anionic polymers including poly(sodium 4-styrenesulfonate) (PSS) and two polythiophene-based photoactive polymers, sodium poly[2-(3-thienyl)-ethoxy-4-butylsulfonate (PTEBS) and poly[3-(potassium-6-hexanoace)thiophene-2,5-diyl] (P3KHT). Controlled multilayer growth is shown through UV-vis spectroscopy, cross-sectional SEM and surface analytical techniques including atomic force microscopy. The formation of an intimate nanorod/conducting polymer bulk heterojunction is confirmed through cross-sectional SEM, TEM, and scanning Auger analysis. A series of photovoltaic devices was fabricated on ITO electrodes using CdSe NRs in combination with PTEBS or P3KHT. A thorough device analysis showed that performance was limited by low short circuit current although charge transfer was confirmed in the ELBL nanocomposite thin films.
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