TY - JOUR
T1 - Cyclopenta[c]thiophene-4,6-dione-based copolymers as organic photovoltaic donor materials
AU - Owczarczyk, Zbyslaw R.
AU - Braunecker, Wade A.
AU - Oosterhout, Stefan D.
AU - Kopidakis, Nikos
AU - Larsen, Ross E.
AU - Ginley, David S.
AU - Olson, Dana C.
PY - 2014/8/5
Y1 - 2014/8/5
N2 - A class of "push-pull" conjugated copolymers based on cyclopenta[c]thiophene-4,6-dione (CTD) and benzodithiophene (BDT) is synthesized for application as an electron donor in organic photovoltaics (OPV). Given the diverse electronic and structural tunability of the CTD unit, specific CTD-containing copolymers are chosen with the aid of theoretical calculations from a broad array of potential candidate materials. Evaluation of the chosen materials as OPV absorbers includes characterization of the optical, electronic, and structural properties of the polymer films using UV-vis absorbance, photoluminescence, cyclic voltammetry, and X-ray diffraction techniques. In addition, the contactless time-resolved microwave conductivity (TRMC) technique is used to measure the photoconductance of polymer/fullerene blends. Excellent correlation between measured photoconductance and OPV device efficiency is demonstrated with these materials and TRMC is discussed as a tool for screening potential active layer materials for OPV devices.
AB - A class of "push-pull" conjugated copolymers based on cyclopenta[c]thiophene-4,6-dione (CTD) and benzodithiophene (BDT) is synthesized for application as an electron donor in organic photovoltaics (OPV). Given the diverse electronic and structural tunability of the CTD unit, specific CTD-containing copolymers are chosen with the aid of theoretical calculations from a broad array of potential candidate materials. Evaluation of the chosen materials as OPV absorbers includes characterization of the optical, electronic, and structural properties of the polymer films using UV-vis absorbance, photoluminescence, cyclic voltammetry, and X-ray diffraction techniques. In addition, the contactless time-resolved microwave conductivity (TRMC) technique is used to measure the photoconductance of polymer/fullerene blends. Excellent correlation between measured photoconductance and OPV device efficiency is demonstrated with these materials and TRMC is discussed as a tool for screening potential active layer materials for OPV devices.
KW - conjugated polymers
KW - density functional theory
KW - molecular energy levels
KW - polymer solar cells
KW - time-resolved microwave conductivity
UR - http://www.scopus.com/inward/record.url?scp=84905722838&partnerID=8YFLogxK
U2 - 10.1002/aenm.201301821
DO - 10.1002/aenm.201301821
M3 - Article
AN - SCOPUS:84905722838
SN - 1614-6832
VL - 4
SP - 1
EP - 9
JO - Advanced Energy Materials
JF - Advanced Energy Materials
IS - 11
M1 - 1301821
ER -