The effects of CdSe incorporation into bulk heterojunction solar cells

Autor(es)

de Freitas, Jilian Nei ^[1] ; Grova, Isabel R. ^[2] ; Akcelrud, Leni C. ^[2] ; Arici, Elif ^[3] ; Sariciftci, N. Serdar ^[3] ; Nogueira, Ana Flavia ^[1]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: Journal of Materials Chemistry; v. 20, n. 23, p. 4845-4853, 2010.
• Citações Web of Science: 66

Resumo

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)

• Processo FAPESP: 05/56924-0 - Celulas fotovoltaicas hibridas de polimeros condutores e nanoparticulas inorganicas.
• Beneficiário: Jilian Nei de Freitas
• Modalidade de apoio: Bolsas no Brasil - Doutorado