Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: S1.00056 : Effects of Annealing on the Photovoltaic Performance of All-Conjugated Poly(3-alkylthiophene) Diblock Copolymer
Author:
The effects of thermal annealing and solvent annealing on the
photovoltaic performance of all-conjugated
poly(3-butylthiophene)-b-poly(3-hexylthiophene) diblock copolymer,
[6,6]-phenyl-C$_{71}$-butyric acid methyl ester
(P3BHT:PC$_{71}$BM) based devices were investigated using the
single diode model. Thermal annealing placed a better balance
between the crystallization of P3BHT chains and the nanoscale
phase separation with PC$_{71}$BM domains, while solvent
annealing under chloroform vapor induced a significant
improvement in the crystallinity of P3BHT as well as enlarged
P3BHT crystalline domains, thereby leading to unbalanced charge
transport and increased charge recombination in the blend films.
The physical meanings of the parameters in the equivalent single
diode model were also discussed in terms of crystallinity and
phase separation to gain the fundamental understanding of the
mechanism that account for the annealing effects.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.S1.56
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