Influence of Molecular Weight on the Performance of Organic Solar Cells Based on a Fluorene Derivative
Artikel i vetenskaplig tidskrift, 2010

The performance of organic photovoltaic (OPV) bulk-heterojunction blends comprising a liquid-crystalline fluorene derivative and a small-molecular fullerene is found to increase asymptotically with the degree of polymerization of the former. Similar to various thermodynamic transition temperatures as well as the light absorbance of the fluorene moiety, the photocurrent extracted from OPV devices is found to strongly vary with increasing oligomer size up to a number average molecular weight, M-n approximate to 10 kg mol(-1), but is rendered less chain-length dependent for higher M-n as the fluorene derivative gradually adopts polymeric behavior.

thermotropic alignment

morphology

thin-films

polyfluorene copolymer/fullerene blends

field-effect transistors

liquid-crystalline

dependence

polyfluorene

charge-transport

open-circuit voltage

polymer

Författare

C. Muller

Linköpings universitet

Ergang Wang

Chalmers, Kemi- och bioteknik, Polymerteknologi

L. M. Andersson

Linköpings universitet

K. Tvingstedt

Linköpings universitet

Y. Zhou

Linköpings universitet

Mats Andersson

Chalmers, Kemi- och bioteknik, Polymerteknologi

Olle Inganäs

Linköpings universitet

Advanced Materials for Optics and Electronics

1057-9257 (ISSN) 1616-3028 (eISSN)

Vol. 20 2124-2131

Ämneskategorier

Kemi

DOI

10.1002/adfm.201000224