Eur. Phys. J. Appl. Phys. 36, 241-244 (2006)
https://doi.org/10.1051/epjap:2006149

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

Received: 25 July 2006
Revised: 20 September 2006
Accepted: 28 September 2006
Published online: 10 January 2007

Abstract

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.