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Article investigation of transmission coefficient and I-V characteristics of OPE-PY-based structures using GOLLUM program
Other Title(s)
تخمين معامل الانتقال و مميزات تيار-فولتية لتراكيب OPE-PY باستعمال برنامج GOLLUM
Joint Authors
Ali, Qasim Ramadan Abd
Lambert, Colin J.
Abbud, Hamid Ibrahim
Source
Issue
Vol. 8, Issue 1 (30 Jun. 2016), pp.104-112, 9 p.
Publisher
University of Kufa Faculty of Science Department of Physics
Publication Date
2016-06-30
Country of Publication
Iraq
No. of Pages
9
Main Subjects
Topics
Abstract EN
Present study deals with the electronic properties of donor-bridge-acceptor(D-B-A) molecular systems.
By employing the density functional theory, the calculations were carried out to analyze the applications of oligophenylene-pyridene OPE-PY-based structures.
All calculations have been carried out using the Gollum program together with SIESTA code at the high end computation unit-Lancaster University-UK.
The results showed that, the high occupied molecular orbitals HOMOs are strongly localized on the anchor groups for the structure with pyridyl anchor group.
The distribution of the frontier molecular orbitals suggests that the conductance may be dominated by transport through the low unoccupied molecular orbitals LUMOs for the configurations with pyridyl anchor group.
The curve of the ionization potential of PY-based configurations structures goes toward low IP (OPE-PY-3˂ OPE-PY-2˂ OPE-PY-1), that means OPE-PY-3 structure needs a small energy to donating electrons in comparison with the others.
Also, all the studied molecular systems have semiconductor properties with energy band gap in the order of OPE-PY-2˂ OPE-PY-3˂ OPE-PY-1.
In addition, the lowest molecular length is for the structures with carbon triple bonds in the middle.
The calculations of the transmission coefficient showed that, the value of the structures without side group is higher than that of the structure with side group.
The electrical transport of these molecules could be control by switching from one type of anchor group to another one and that means these molecules could useful for sensing device-applications.
American Psychological Association (APA)
Ali, Qasim Ramadan Abd& Abbud, Hamid Ibrahim& Lambert, Colin J.. 2016. Article investigation of transmission coefficient and I-V characteristics of OPE-PY-based structures using GOLLUM program. Journal of Kufa-Physics،Vol. 8, no. 1, pp.104-112.
https://search.emarefa.net/detail/BIM-782015
Modern Language Association (MLA)
Ali, Qasim Ramadan Abd…[et al.]. Article investigation of transmission coefficient and I-V characteristics of OPE-PY-based structures using GOLLUM program. Journal of Kufa-Physics Vol. 8, no. 1 (2016), pp.104-112.
https://search.emarefa.net/detail/BIM-782015
American Medical Association (AMA)
Ali, Qasim Ramadan Abd& Abbud, Hamid Ibrahim& Lambert, Colin J.. Article investigation of transmission coefficient and I-V characteristics of OPE-PY-based structures using GOLLUM program. Journal of Kufa-Physics. 2016. Vol. 8, no. 1, pp.104-112.
https://search.emarefa.net/detail/BIM-782015
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 112
Record ID
BIM-782015