Ultrathin films of homeotropically aligned columnar liquid crystals on indium tin oxide electrodes

被引：43

作者：

Charlet, E. ^{[1
]}

Grelet, E. ^{[1
]}

Brettes, P. ^{[1
]}

Bock, H. ^{[1
]}

Saadaoui, H. ^{[1
]}

Cisse, L. ^{[2
]}

Destruel, P. ^{[2
]}

Gherardi, N. ^{[2
]}

Seguy, I. ^{[2
]}

机构：

[1] Univ Bordeaux 1, Ctr Rech Paul Pascal, CNRS, F-33600 Pessac, France

[2] Univ Toulouse 3, Lab LAPLACE, CNRS, F-31062 Toulouse 9, France

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 02期

关键词：

D O I：

10.1063/1.2831009

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the achievement of very thin films (thickness of about 50 nm) of thermotropic columnar liquid crystal in homeotropic (columns normal to the interface) orientation on indium tin oxide (ITO) electrodes. The face-on alignment of the discotic compound has been obtained by thermal annealing without any intermediate coating between the mesophase and the ITO substrate. Such a columnar mesophase alignment is thus shown on a substrate of technological interest in open supported thin film reaching the thickness range suitable for organic photovoltaic devices. (c) 2008 American Institute of Physics.

引用

页数：3

共 18 条

[1] FAST PHOTOCONDUCTION IN THE HIGHLY ORDERED COLUMNAR PHASE OF A DISCOTIC LIQUID-CRYSTAL [J].

ADAM, D ;

SCHUHMACHER, P ;

SIMMERER, J ;

HAUSSLING, L ;

SIEMENSMEYER, K ;

ETZBACH, KH ;

RINGSDORF, H ;

HAARER, D .

NATURE, 1994, 371 (6493) :141-143

[2] Electroluminescent diodes from complementary discotic benzoperylenes [J].

Alibert-Fouet, S ;

Dardel, S ;

Bock, H ;

Oukachmih, M ;

Archambeau, S ;

Seguy, I ;

Jolinat, P ;

Destruel, P .

CHEMPHYSCHEM, 2003, 4 (09) :983-985

[3] Stabilization of discotic liquid organic thin films by ITO surface treatment [J].

Archambeau, S. ;

Seguy, I. ;

Jolinat, P. ;

Farenc, J. ;

Destruel, P. ;

Nguyen, T. P. ;

Bock, H. ;

Grelet, E. .

APPLIED SURFACE SCIENCE, 2006, 253 (04) :2078-2086

[4] Discotic liquid crystals 25 years on [J].

Bushby, RJ ;

Lozman, OR .

CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, 2002, 7 (5-6) :343-354

[5] Doping-induced efficiency enhancement in organic photovoltaic devices [J].

Chan, M. Y. ;

Lai, S. L. ;

Fung, M. K. ;

Lee, C. S. ;

Lee, S. T. .

APPLIED PHYSICS LETTERS, 2007, 90 (02)

[6]

de Gennes P.-G., 2004, Capillarity and Wetting phenomena: drops, bubbles, pearls, Waves

[7] Homeotropic alignment of columnar liquid crystals in open films by means of surface nanopatterning [J].

Gearba, Raluca I. ;

Anokhin, Denis V. ;

Bondar, Alexander I. ;

Bras, Wim ;

Jahr, Michael ;

Lehmann, Matthias ;

Ivanov, Dimitri A. .

ADVANCED MATERIALS, 2007, 19 (06) :815-+

[8] Control of the orientation of thin open supported columnar liquid crystal films by the kinetics of growth [J].

Grelet, E ;

Bock, H .

EUROPHYSICS LETTERS, 2006, 73 (05) :712-718

[9] Surface energy and polarity of treated indium-tin-oxide anodes for polymer light-emitting diodes studied by contact-angle measurements [J].

Kim, JS ;

Friend, RH ;

Cacialli, F .

JOURNAL OF APPLIED PHYSICS, 1999, 86 (05) :2774-2778

[10] Glow and Townsend dielectric barrier discharge in various atmosphere [J].

Massines, F ;

Gherardi, N ;

Naudé, N ;

Ségur, P .

PLASMA PHYSICS AND CONTROLLED FUSION, 2005, 47 :B577-B588

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