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Time-of-flight measurements and vertical transport in a high electron-mobility polymer

  • We investigate charge transport in a high-electron mobility polymer, poly(N, N-bis 2-octyldodecyl-naphthalene-1,4,5,8-bis dicarboximide-2,6-diyl-alt-5,5-2,2-bithiophene) [P(NDI2OD-T2), Polyera ActivInk (TM) N2200]. Time-of-flight measurements reveal electron mobilities approaching those measured in field-effect transistors, the highest ever recorded in a conjugated polymer using this technique. The modest temperature dependence and weak dispersion of the transients indicate low energetic disorder in this material. Steady-state electron-only current measurements reveal a barrier to injection of about 300 meV. We propose that this barrier is located within the P(NDI2OD-T2) film and arises from molecular orientation effects.

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Author:James C. Blakesley, Marcel Schubert, Robert Steyrleuthner, Zhihua Chen, Antonio Facchetti, Dieter NeherORCiDGND
ISSN:0003-6951 (print)
Parent Title (English):Applied physics letters
Publisher:American Institute of Physics
Place of publication:Melville
Document Type:Article
Year of first Publication:2011
Year of Completion:2011
Release Date:2017/03/26
Funder:German Federal Ministry of Science and Education (BMBF) [FKZ 03X3525D]; German Research Foundation (DFG) [SPP 1355]
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Peer Review:Referiert