Optical conductivity and optical effective mass in a high-mobility organic semiconductor: Implications for the nature of charge transport

Handle URI:
http://hdl.handle.net/10754/555959
Title:
Optical conductivity and optical effective mass in a high-mobility organic semiconductor: Implications for the nature of charge transport
Authors:
Li, Yuan ( 0000-0002-4958-6132 ) ; Yi, Yuanping; Coropceanu, Veaceslav; Bredas, Jean-Luc ( 0000-0001-7278-4471 )
Abstract:
We present a multiscale modeling of the infrared optical properties of the rubrene crystal. The results are in very good agreement with the experimental data that point to nonmonotonic features in the optical conductivity spectrum and small optical effective masses. We find that, in the static-disorder approximation, the nonlocal electron-phonon interactions stemming from low-frequency lattice vibrations can decrease the optical effective masses and lead to lighter quasiparticles. On the other hand, the charge-transport and infrared optical properties of the rubrene crystal at room temperature are demonstrated to be governed by localized carriers driven by inherent thermal disorders. Our findings underline that the presence of apparently light carriers in high-mobility organic semiconductors does not necessarily imply bandlike transport.
KAUST Department:
Solar and Photovoltaic Engineering Research Center
Citation:
Optical conductivity and optical effective mass in a high-mobility organic semiconductor: Implications for the nature of charge transport 2014, 90 (24) Physical Review B
Journal:
Physical Review B
Issue Date:
3-Dec-2014
DOI:
10.1103/PhysRevB.90.245112
Type:
Article
ISSN:
1098-0121; 1550-235X
Additional Links:
http://link.aps.org/doi/10.1103/PhysRevB.90.245112
Appears in Collections:
Articles; Solar and Photovoltaic Engineering Research Center (SPERC); Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorLi, Yuanen
dc.contributor.authorYi, Yuanpingen
dc.contributor.authorCoropceanu, Veaceslaven
dc.contributor.authorBredas, Jean-Lucen
dc.date.accessioned2015-05-28T06:53:41Zen
dc.date.available2015-05-28T06:53:41Zen
dc.date.issued2014-12-03en
dc.identifier.citationOptical conductivity and optical effective mass in a high-mobility organic semiconductor: Implications for the nature of charge transport 2014, 90 (24) Physical Review Ben
dc.identifier.issn1098-0121en
dc.identifier.issn1550-235Xen
dc.identifier.doi10.1103/PhysRevB.90.245112en
dc.identifier.urihttp://hdl.handle.net/10754/555959en
dc.description.abstractWe present a multiscale modeling of the infrared optical properties of the rubrene crystal. The results are in very good agreement with the experimental data that point to nonmonotonic features in the optical conductivity spectrum and small optical effective masses. We find that, in the static-disorder approximation, the nonlocal electron-phonon interactions stemming from low-frequency lattice vibrations can decrease the optical effective masses and lead to lighter quasiparticles. On the other hand, the charge-transport and infrared optical properties of the rubrene crystal at room temperature are demonstrated to be governed by localized carriers driven by inherent thermal disorders. Our findings underline that the presence of apparently light carriers in high-mobility organic semiconductors does not necessarily imply bandlike transport.en
dc.relation.urlhttp://link.aps.org/doi/10.1103/PhysRevB.90.245112en
dc.rightsArchived with thanks to Physical Review Ben
dc.titleOptical conductivity and optical effective mass in a high-mobility organic semiconductor: Implications for the nature of charge transporten
dc.typeArticleen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Centeren
dc.identifier.journalPhysical Review Ben
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionSchool of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, Georgia 30332-0400, USAen
dc.contributor.institutionKey Laboratory of Organic Solids, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, Chinaen
kaust.authorBredas, Jean-Lucen
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