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Negative giant surface potential of vacuum-evaporated tris(7-propyl-8-hydroxyquinolinolato) aluminum(III) [Al(7-Prq)(3)] film
- Authors
- Isoshima, Takashi; Okabayashi, Youichi; Ito, Eisuke; Hara, Masahiko; Chin, Whee Won; Han, Jin Wook
- Issue Date
- Aug-2013
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Giant surface potential; Alq(3); Vacuum evaporation; Spontaneous polar molecular orientation; Kelvin probe; 1st-Order electroabsorption spectroscopy
- Citation
- ORGANIC ELECTRONICS, v.14, no.8, pp.1988 - 1991
- Indexed
- SCIE
SCOPUS
- Journal Title
- ORGANIC ELECTRONICS
- Volume
- 14
- Number
- 8
- Start Page
- 1988
- End Page
- 1991
- ISSN
- 1566-1199
- Abstract
- Negative giant surface potential was realized in a vacuum-evaporated film of tris(7-propyl-8-hydroxyquinolinolato) aluminum(III) [Al(7-Prq)(3)]. Electroabsorption response of the film presented an inverted polarity to that of tris(8-hydroxyquinolinolato) aluminum (Alq(3)), suggesting opposite noncentrosymmetry of molecular orientation. Asymmetric dice model with molecular geometric effect has been proposed, and propyl substitution at 7 position of the ligands was indicated to affects the molecular posture on the surface to invert the polarity of noncentrosymmetry. Our results opened a new possibility of controlling molecular orientation in a film for device applications. (C) 2013 Elsevier B.V. All rights reserved.
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Collections - 서울 자연과학대학 > 서울 화학과 > 1. Journal Articles
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Related Researcher
- Han, Jin Wook
- COLLEGE OF NATURAL SCIENCES (DEPARTMENT OF CHEMISTRY)