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 (Alq3), 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.
| Original language | English |
|---|---|
| Pages (from-to) | 1988-1991 |
| Number of pages | 4 |
| Journal | Organic Electronics |
| Volume | 14 |
| Issue number | 8 |
| DOIs | |
| State | Published - 2013 Jan 1 |
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Keywords
- 1st-Order electroabsorption spectroscopy
- Giant surface potential
- Kelvin probe
- Spontaneous polar molecular orientation
- Vacuum evaporation
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Negative giant surface potential of vacuum-evaporated tris(7-propyl-8- hydroxyquinolinolato) aluminum(III) [Al(7-Prq)3] film. / Isoshima, Takashi; Okabayashi, Youichi; Ito, Eisuke; Hara, Masahiko; Chin, Whee Won; Han, Jin Wook.
In: Organic Electronics, Vol. 14, No. 8, 01.01.2013, p. 1988-1991.Research output: Contribution to journal › Article
TY - JOUR
T1 - Negative giant surface potential of vacuum-evaporated tris(7-propyl-8- hydroxyquinolinolato) aluminum(III) [Al(7-Prq)3] film
AU - Isoshima, Takashi
AU - Okabayashi, Youichi
AU - Ito, Eisuke
AU - Hara, Masahiko
AU - Chin, Whee Won
AU - Han, Jin Wook
PY - 2013/1/1
Y1 - 2013/1/1
N2 - 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 (Alq3), 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.
AB - 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 (Alq3), 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.
KW - 1st-Order electroabsorption spectroscopy
KW - Giant surface potential
KW - Kelvin probe
KW - Spontaneous polar molecular orientation
KW - Vacuum evaporation
UR - http://www.scopus.com/inward/record.url?scp=84878144843&partnerID=8YFLogxK
U2 - 10.1016/j.orgel.2013.04.032
DO - 10.1016/j.orgel.2013.04.032
M3 - Article
AN - SCOPUS:84878144843
VL - 14
SP - 1988
EP - 1991
JO - Organic Electronics: physics, materials, applications
JF - Organic Electronics: physics, materials, applications
SN - 1566-1199
IS - 8
ER -