Charge carrier mobility through vacuum–sublimed glassy films of s-triazine- and carbazole-based bipolar hybrid and unipolar compounds

Wang, Qiang; Wallace, Jason U.; Lee, Thomas Y.-H.; Zeng, Lichang; Ou, Jane J.; Chen, Shaw H.

doi:10.1016/j.orgel.2013.08.017

Charge carrier mobility through vacuum–sublimed glassy films of s-triazine- and carbazole-based bipolar hybrid and unipolar compounds

Journal Article · Fri Nov 01 04:00:00 EDT 2013 · Organic Electronics

DOI:https://doi.org/10.1016/j.orgel.2013.08.017· OSTI ID:1095272

Wang, Qiang ^[1]; Wallace, Jason U.; Lee, Thomas Y.-H.; Zeng, Lichang; Ou, Jane J.; Chen, Shaw H.

Laboratory for Laser Energetics, University of Rochester, Rochester, NY

Instead of physical mixtures as bipolar charge transport media for organic electronics, chemical hybrids comprising non-conjugated spacers are explored to strive for miscibility and morphological stability. Bipolar TRZ-3Cz(MP)2 and TRZ-1Cz(MP)2 as well as unipolar C3-2TRZ(2tBu), C2-2TRZ(2tBu) and C3-2Cz(MP)2 were synthesized with propylene or ethylene spacers serving to decouple the Cz(MP)2 and TRZ moieties. Glassy films were prepared by vacuum sublimation for the characterization of transport properties using the photocurrent time-of-flight technique. The results indicate that both the TRZ:Cz(MP)2 ratio and the spacer length enable charge-carrier mobility to be modulated across orders of magnitude. The C2-2TRZ(2tBu) film exhibits the highest electron mobility of all the unipolar TRZ-based glassy films reported to date.

Research Organization:: Univ. of Rochester, NY (United States). Lab. for Laser Energetics

Sponsoring Organization:: USDOE

DOE Contract Number:: FC52-08NA28302

OSTI ID:: 1095272

Report Number(s):: DOE/NA/28302-1134; 2013-51; 2106

Journal Information:: Organic Electronics, Journal Name: Organic Electronics Journal Issue: 11 Vol. 14; ISSN 1566-1199

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Bipolar and unipolar organic compounds
Charge-carrier mobility
Vacuum-sublimed glassy films

Charge carrier mobility through vacuum–sublimed glassy films of s-triazine- and carbazole-based bipolar hybrid and unipolar compounds

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