Eur. Phys. J. Appl. Phys.
Volume 36, Number 3, December 2006
|Page(s)||241 - 244|
|Section||Nanomaterials and Nanotechnologies|
|Published online||10 January 2007|
Influence of the morphology of organic heterojunction on the photovoltaic cell performance*
Institute of Macromolecular Chemistry, Academy of Sciences of the Czech
Republic, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
Revised: 20 September 2006
Accepted: 28 September 2006
Published online: 10 January 2007
We present a series of organic photovoltaic (PV) cells based on the bulk-distributed heterojunction where -conjugated polymer poly[1-(4-trimethylsilylphenyl)-2-phenylvinylene], PSDPhV, acts as the donor upon photoexcitation and the substituted perylene based low-molecular-weight compound: N,N`-di(pent-3-yl)-perylene-3,4:9,10-bis(dicarboximide), DPe-PTCDI, as the acceptor of photogenerated electrons. According to both absorption spectra and AFM images of the thin films spin-coated from solution of DPe-PTCDI and PSDPhV in toluene, the DPe-PTCDI is molecularly dissolved in conjugated polymer matrix. Upon exposition of layers to toluene vapors, microcrystals of DPe-PTCDI are progressively formed. The influence of the morphology of DPe-PTCDI inside the polymer matrix on PV cell performance is investigated.
PACS: 73.50.Pz – Photoconduction and photovoltaic effects / 73.50.Gr – Charge carriers: generation, recombination, lifetime, trapping, mean free paths / 73.61.Ph – Polymers; organic compounds
© EDP Sciences, 2006
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