Journal
SYNTHETIC METALS
Volume 162, Issue 13-14, Pages 1264-1270Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2012.05.014
Keywords
Organic semiconductors; Organic field-effect transistors; Environmental stability; Crystal structure; Mobility
Funding
- Project for Developing Innovation Systems of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
Ask authors/readers for more resources
We have successfully synthesized and characterized newly designed oxidation-resistant N,N'-dialkylated dihydrodiazapentacene (1a: alkyl = hexyl) and (1b: alkyl = stearyl) as stable semiconductor materials under ambient conditions for organic field-effect transistors (OFETs). The crystal structure analysis has allowed us to know that 1a has a face-to-face slipped pi-pi stacking motif, with the intermolecular distance being about 3.49 angstrom. which forms a one-dimensional column. XRD and AFM measurements reveal that the vacuum deposited films of 1a and 1b are similar crystalline phases with molecules being tilted from the substrate plane. The OFETs fabricated using 1a and 1b exhibit typical p-type FET performances with mobilities of 3.2 x 10(-3) and 3.0 x 10(-5) cm(2) V-1 s(-1), respectively. The storage tests of OFETs using la in the presence of air for 3 months have proven high device stability with no significant changes in mobilities and on/off ratios. The relatively low mobilities can be attributed to the undesirable overlap of HOMOs and the strongly anisotropic one-dimensional pi-pi stacking. (c) 2012 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available