Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The effects of CdSe incorporation into bulk heterojunction solar cells

Full text
de Freitas, Jilian Nei [1] ; Grova, Isabel R. [2] ; Akcelrud, Leni C. [2] ; Arici, Elif [3] ; Sariciftci, N. Serdar [3] ; Nogueira, Ana Flavia [1]
Total Authors: 6
[1] Univ Estadual Campinas, LNES, UNICAMP, BR-13083970 Campinas, SP - Brazil
[2] Univ Fed Parana, LaPPS, BR-80060000 Curitiba, Parana - Brazil
[3] Johannes Kepler Univ Linz, Linz Inst Organ Solar Cells LIOS, A-4040 Linz - Austria
Total Affiliations: 3
Document type: Journal article
Source: Journal of Materials Chemistry; v. 20, n. 23, p. 4845-4853, 2010.
Web of Science Citations: 66

Hybrid solar cells based on CdSe nanoparticles and a PPV-type polymer containing fluorene and thiophene units (PFT) were investigated. The CdSe/PFT devices showed very low photocurrent and fill factor values, which was attributed to the poor charge transport in the TOPO-capped CdSe nanoparticle phase. Thus, ternary systems based on mixtures of PFT/CdSe and the fullerene derivative PCBM were investigated. The CdSe: PCBM ratio was varied, and nanoparticles with different sizes were also used. It was observed that for the optimized composition of 20 wt% PFT + 40 wt% CdSe + 40 wt% PCBM the devices presented higher photocurrents and efficiencies. The photophysical and electrochemical properties and microscopy images (AFM and HRTEM) of the ternary systems were systematically investigated to elucidate the mechanism of action of the inorganic nanoparticles in these ternary hybrid devices. (AU)