Abstracts Book - IMRC 2018

• SC4-P008
DEVELOPMENT OF TWO DONOR-ACCEPTOR COPOLYMERS FOR
EVALUATION IN BULK HETERO-JUNCTION POLYMER SOLAR
CELLS
Jonatan Rodriguez Rea 1 , Marisol Güizado Rodríguez 1 , Victor Barba 2 , Jose-Luis Maldonado 3
1 Universidad Autónoma del Estado de Morelos, Centro de Investigación en Ingeniería y
Ciencias Aplicadas, Mexico. 2 Universidad Autónoma del Estado de Morelos, Centro de
Investigaciones Químicas, Mexico. 3 Centro de Investigaciones en Optica, Grupo de Propiedades
Ópticas de la Materia, Mexico.
Nowadays, organic solar cells (OSCs) are some of the most important devices
that have attracted considerable attention as a clean-energy harvesting
technology for their ability to form flexible, large-area photovoltaic panels by
low-cost solution processing methods. Conjugated donor-acceptor (D-A)
copolymers consisting of alternating in-chain electron-rich and electrondeficient
subunits are promising solution-processable photoactive layer
semiconductors for polymer solar cells (PSCs). Power conversion efficiencies
(PCEs) >13% have been recently achieved in bulk-heterojunction (BHJ).
[1] Benzothiadiazole and diketopyrrolopyrrole possess excellent optoelectronic
characteristics such as strong light absorption, high conjugation, coplanar
structure, and good photochemical stability and they have a strong electron
withdrawing nature. [2] In this work, two D-A copolymers based on 3,4-
dihexylthiophene and 4,7-dibromobenzo[c]-1,2,5-thiadiazole (BT) and
thieno[3,2-b]thiophene and 3,6-dithiophene-2-yl-pyrrole[3,4-c]pyrrole-1,4-dione
(DPP), were synthetized via direct arylation polycondensation under optimized
reaction condition using palladium acetate as catalyst, potassium carbonate and
neodecanoic acid in N,N-dimethylacetamide. The semiconducting polymers
were purified by soxhlet extraction procedure using several solvents. The
evaluation of both polymers in organic solar cells was carried out using a BHJ
architecture with ITO/PEDOT:PSS/active layer/PFN/Field’s metal configuration.
D-A copolymers described herein have relevant physicochemical properties and
promising efficiencies in organic solar cells.
References
[1] W. Zhao, S. Li, et al. J. Am. Chem. Soc. 2017, 139, 7148.
[2] J. Jung and W. Ho-Jo, Chem. Mater. 2015, 27, 6038.