Impact of interfacial dipole on carrier transport in bulk heterojunction poly(3-hexylthiophene) and [6,6]-phenyl C61-butyric acid methyl ester blends | Zendy

SaiWing Tsang | Zendy; Nicolas Drolet | Zendy; S. C. Tse | Zendy; Ye Tao | Zendy; ZhengHong Lu | Zendy

Open Access

Impact of interfacial dipole on carrier transport in bulk heterojunction poly(3-hexylthiophene) and [6,6]-phenyl C61-butyric acid methyl ester blends

Author(s) -

SaiWing Tsang,

Nicolas Drolet,

S. C. Tse,

Ye Tao,

ZhengHong Lu

Publication year - 2010

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3499368

Subject(s) - electron mobility , materials science , heterojunction , dipole , admittance , chemical engineering , analytical chemistry (journal) , organic chemistry , chemistry , optoelectronics , electrical engineering , engineering , electrical impedance

The electron transport properties in various poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61-butyric acid methyl ester (PC61BM) blend films, prepared by various process conditions, were investigated by admittance spectroscopy at different temperatures. It was found that the electron mobility and the dispersive transport behavior showed a strong dependence on the thermal treatment condition; the blend with the fastest growth rate had orders of magnitude reduction in the mobility and a much more dispersive transport. Using the Gaussian disorder model, it was found that the energetic disorder of the density-of-states between blends plays a significant role in the observed phenomena. It is proposed that the difference in the energetic disorder is due to the interfacial dipole effect at the P3HT/PC61BM heterojunctions in the various blend films.Peer reviewed: YesNRC publication: Ye

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