Issue 23, 2010
From the journal:

Journal of Materials Chemistry

The effects of CdSe incorporation into bulk heterojunction solar cells†

Jilian Nei de Freitas,a   Isabel R. Grova,b   Leni C. Akcelrud,b   Elif Arici,c   N. Serdar Sariciftcic  and  Ana Flávia Nogueira*a  

* Corresponding authors

a Laboratório de Nanotecnologia e Energia Solar (LNES) – Universidade Estadual de Campinas, UNICAMP, P.O. Box 6154, Campinas, SP, Brazil
E-mail: anaflavia@iqm.unicamp.br
Fax: +55 19 35213023
Tel: +55 19 35213029

b Laboratório de Polímeros Paulo Scarpa (LaPPS) – Universidade Federal do Paraná, UFPR, Curitiba, Brazil

c Linz Institute for Organic Solar Cells (LIOS) – Johannes Kepler University Linz, Altenberger Strasse 69, Linz, Austria

Abstract

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.

Graphical abstract: The effects of CdSe incorporation into bulk heterojunction solar cells

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Article information

DOI
https://doi.org/10.1039/C0JM00191K
Article type
Paper
Submitted
28 Jan 2010
Accepted
18 Mar 2010
First published
30 Apr 2010

J. Mater. Chem., 2010,20, 4845-4853

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The effects of CdSe incorporation into bulk heterojunction solar cells

J. N. de Freitas, I. R. Grova, L. C. Akcelrud, E. Arici, N. S. Sariciftci and A. F. Nogueira, J. Mater. Chem., 2010, 20, 4845 DOI: 10.1039/C0JM00191K

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