Open AccessCharge dissociation in polymer:fullerene bulk heterojunction solar cells with enhanced permittivity
Author(s) -
Martijn Lenes,
Floris B. Kooistra,
Jan C. Hummelen,
Ineke Van Severen,
Laurence Lutsen,
Dirk Vanderzande,
Thomas J. Cleij,
Paul W. M. Blom
Publication year - 2008
Publication title -
journal of applied physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.699
H-Index - 319
eISSN - 1089-7550
pISSN - 0021-8979
DOI - 10.1063/1.3039191
Subject(s) - fullerene , materials science , photocurrent , polymer solar cell , permittivity , heterojunction , dielectric , dissociation (chemistry) , polymer , phenylene , acceptor , chemical physics , photochemistry , optoelectronics , chemistry , condensed matter physics , organic chemistry , composite material , physics
The dissociation efficiency of bound electron-hole pairs at the donor-acceptor interface in bulk heterojunction solar cells is partly limited due to the low dielectric constant of the polymer:fullerene blend. In this chapter the photocurrent generation in blends consisting of a fullerene derivative and an oligo(oxyethylene) substituted poly(p-phenylenevinylene) derivative with an enhanced relative permittivity of 4 is investigated. It is demonstrated that in spite of the relatively low hole mobility of the glycol substituted PPV the increase of the spatially averaged permittivity leads to an enhanced charge dissociation of 72% at short circuit conditions for these polymer:fullerene blends.
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