Control of the dipole layer of polar organic molecules adsorbed on metal surfaces via different charge-transfer channels

Hdl Handle:
http://hdl.handle.net/10034/620425
Title:
Control of the dipole layer of polar organic molecules adsorbed on metal surfaces via different charge-transfer channels
Authors:
Lin, Meng-Kai; Nakayama, Yasuo; Zhuang, Ying-Jie; Su, Kai-Jun; Wang, Chin-Yung; Pi, Tun-Wen; Metz, Sebastian; Papadopoulos, Theodoros A.; Chiang, Tai-Chang; Ishii, Hisao; Tang, Shu-Jung
Abstract:
Organic molecules with a permanent electric dipole moment have been widely used as a template for further growth of molecular layers in device structures. Key properties of the resulting organic films such as energy level alignment (ELA), work function, and injection/collection barrier are linked to the magnitude and direction of the dipole moment at the interface. Using angle-resolved photoemission spectroscopy (ARPES), we have systematically investigated the coverage-dependent work function and spectral line shapes of occupied molecular energy states (MES) of chloroaluminium-phthalocyanine (ClAlPc) grown on Ag(111). We demonstrate that the dipole orientation of the first ClAlPc layer can be controlled by adjusting the deposition rate and post annealing conditions; the ELA at the interface differs by ~0.4 eV between the Cl-up and -down configurations of the adsorbed ClAlPc molecules. These observations are rationalized by density-functional-theory (DFT) calculations based on a realistic model of the ClAlPc/Ag(111) interface, which reveal that the different orientations of the ClAlPc dipole layer lead to different charge-transfer channels between the adsorbed ClAlPc and Ag(111) substrate. Our findings provide a useful framework towards method development for ELA tuning.
Affiliation:
University of Chester
Citation:
Lin, M.-K., et al. (2017). Control of the dipole layer of polar organic molecules adsorbed on metal surfaces via different charge-transfer channels. Physical Review B, 95(8), 085425. DOI: 10.1103/PhysRevB.95.085425
Publisher:
American Physical Society
Journal:
Physical Review B
Publication Date:
17-Feb-2017
URI:
http://hdl.handle.net/10034/620425
DOI:
10.1103/PhysRevB.95.085425
Additional Links:
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.085425
Type:
Article
Language:
en
EISSN:
2469-9969
Appears in Collections:
Natural Sciences

Full metadata record

DC FieldValue Language
dc.contributor.authorLin, Meng-Kaien
dc.contributor.authorNakayama, Yasuoen
dc.contributor.authorZhuang, Ying-Jieen
dc.contributor.authorSu, Kai-Junen
dc.contributor.authorWang, Chin-Yungen
dc.contributor.authorPi, Tun-Wenen
dc.contributor.authorMetz, Sebastianen
dc.contributor.authorPapadopoulos, Theodoros A.en
dc.contributor.authorChiang, Tai-Changen
dc.contributor.authorIshii, Hisaoen
dc.contributor.authorTang, Shu-Jungen
dc.date.accessioned2017-03-02T11:54:41Z-
dc.date.available2017-03-02T11:54:41Z-
dc.date.issued2017-02-17-
dc.identifier.citationLin, M.-K., et al. (2017). Control of the dipole layer of polar organic molecules adsorbed on metal surfaces via different charge-transfer channels. Physical Review B, 95(8), 085425. DOI: 10.1103/PhysRevB.95.085425en
dc.identifier.doi10.1103/PhysRevB.95.085425-
dc.identifier.urihttp://hdl.handle.net/10034/620425-
dc.description.abstractOrganic molecules with a permanent electric dipole moment have been widely used as a template for further growth of molecular layers in device structures. Key properties of the resulting organic films such as energy level alignment (ELA), work function, and injection/collection barrier are linked to the magnitude and direction of the dipole moment at the interface. Using angle-resolved photoemission spectroscopy (ARPES), we have systematically investigated the coverage-dependent work function and spectral line shapes of occupied molecular energy states (MES) of chloroaluminium-phthalocyanine (ClAlPc) grown on Ag(111). We demonstrate that the dipole orientation of the first ClAlPc layer can be controlled by adjusting the deposition rate and post annealing conditions; the ELA at the interface differs by ~0.4 eV between the Cl-up and -down configurations of the adsorbed ClAlPc molecules. These observations are rationalized by density-functional-theory (DFT) calculations based on a realistic model of the ClAlPc/Ag(111) interface, which reveal that the different orientations of the ClAlPc dipole layer lead to different charge-transfer channels between the adsorbed ClAlPc and Ag(111) substrate. Our findings provide a useful framework towards method development for ELA tuning.en
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.urlhttp://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.085425en
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectMetal-organic interfaceen
dc.subjectAg(111)/ClAlPcen
dc.titleControl of the dipole layer of polar organic molecules adsorbed on metal surfaces via different charge-transfer channelsen
dc.typeArticleen
dc.identifier.eissn2469-9969-
dc.contributor.departmentUniversity of Chesteren
dc.identifier.journalPhysical Review Ben
dc.date.accepted2017-12-02-
or.grant.openaccessYesen
rioxxterms.funderNational Science Council of Taiwanen
rioxxterms.identifier.projectNSC 98-2112-M-007- 017-MY3en
rioxxterms.versionAMen
rioxxterms.licenseref.startdate2017-02-17-
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