TY - JOUR
T1 - Measurements of Ambipolar Seebeck Coefficients in High-Mobility Diketopyrrolopyrrole Donor–Acceptor Copolymers
AU - Broch, Katharina
AU - Venkateshvaran, Deepak
AU - Lemaur, Vincent
AU - Olivier, Yoann
AU - Beljonne, David
AU - Zelazny, Mateusz
AU - Nasrallah, Iyad
AU - Harkin, David J.
AU - Statz, Martin
AU - Pietro, Riccardo Di
AU - Kronemeijer, Auke Jisk
AU - Sirringhaus, Henning
PY - 2017/11/1
Y1 - 2017/11/1
N2 - The Seebeck coefficient of both electrons and holes in a family of ambipolar diketopyrrolopyrrole copolymers is investigated using field-effect gated measurements. It is found that at high carrier concentrations the magnitude of the Seebeck coefficients is not strongly dependent on the molecular structure of the backbone within this family of polymers. Additionally, the Seebeck coefficients of electrons and holes have very similar magnitudes showing that electrons and holes experience a similar energetic landscape. Subtle differences in the carrier concentration dependence between the polymers are observed, which are interpreted in terms of different degrees of energetic disorder on the basis of molecular dynamics and electronic structure simulations.
AB - The Seebeck coefficient of both electrons and holes in a family of ambipolar diketopyrrolopyrrole copolymers is investigated using field-effect gated measurements. It is found that at high carrier concentrations the magnitude of the Seebeck coefficients is not strongly dependent on the molecular structure of the backbone within this family of polymers. Additionally, the Seebeck coefficients of electrons and holes have very similar magnitudes showing that electrons and holes experience a similar energetic landscape. Subtle differences in the carrier concentration dependence between the polymers are observed, which are interpreted in terms of different degrees of energetic disorder on the basis of molecular dynamics and electronic structure simulations.
KW - ambipolar transport
KW - organic semiconductors
KW - organic thermoelectrics
KW - Seebeck coefficient
UR - http://www.scopus.com/inward/record.url?scp=85028017682&partnerID=8YFLogxK
U2 - 10.1002/aelm.201700225
DO - 10.1002/aelm.201700225
M3 - Article
AN - SCOPUS:85028017682
SN - 2199-160X
VL - 3
JO - Advanced Electronic Materials
JF - Advanced Electronic Materials
IS - 11
M1 - 1700225
ER -