Negative giant surface potential of vacuum-evaporated tris(7-propyl-8-hydroxyquinolinolato) aluminum(III) [Al(7-Prq)(3)] film
- Title
- Negative giant surface potential of vacuum-evaporated tris(7-propyl-8-hydroxyquinolinolato) aluminum(III) [Al(7-Prq)(3)] film
- Author
- 한진욱
- Keywords
- Giant surface potential; Alq(3); Vacuum evaporation; Spontaneous polar molecular orientation; Kelvin probe; 1st-Order electroabsorption spectroscopy
- Issue Date
- 2013-05
- Publisher
- Elsevier Science B.V
- Citation
- Organic Electronics, Aug 2013, 14(8), P.1988-1991
- 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.
- URI
- https://www.sciencedirect.com/science/article/pii/S1566119913001912?via%3Dihub
- ISSN
- 1566-1199
- DOI
- 10.1016/j.orgel.2013.04.032
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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