Discotic liquid crystals: A new generation of organic semiconductors

被引:1280
作者
Sergeyev, Sergey
Pisula, Wojciech
Geerts, Yves Henri
机构
[1] Univ Libre Bruxelles, Lab Chim Polymeres, B-1050 Brussels, Belgium
[2] Max Planck Inst Polymer Res, D-55128 Mainz, Germany
关键词
D O I
10.1039/b417320c
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Discotic (disc-like) molecules typically comprising a rigid aromatic core and flexible peripheral chains have been attracting growing interest because of their fundamental importance as model systems for the study of charge and energy transport and due to the possibilities of their application in organic electronic devices. This critical review covers various aspects of recent research on discotic liquid crystals, in particular, molecular design concepts, supramolecular structure, processing into ordered thin films and fabrication of electronic devices. The chemical structure of the conjugated core of discotic molecules governs, to a large extent, their intramolecular electronic properties. Variation of the peripheral flexible chains and of the aromatic core is decisive for the tuning of self- assembly in solution and in bulk. Supramolecular organization of discotic molecules can be effectively controlled by the choice of the processing methods. In particular, approaches to obtain suitable macroscopic orientations of columnar superstructures on surfaces, that is, planar uniaxial or homeotropic alignment, are discussed together with appropriate processing techniques. Finally, an overview of charge transport in discotic materials and their application in optoelectronic devices is given (234 references).
引用
收藏
页码:1902 / 1929
页数:28
相关论文
共 251 条
[91]   Columnar mesophases of alkylated hexa-peri-hexabenzocoronenes with remarkably large phase widths [J].
Herwig, P ;
Kayser, CW ;
Mullen, K ;
Spiess, HW .
ADVANCED MATERIALS, 1996, 8 (06) :510-&
[92]   Self-assembled hexa-peri-hexabenzocoronene graphitic nanotube [J].
Hill, JP ;
Jin, WS ;
Kosaka, A ;
Fukushima, T ;
Ichihara, H ;
Shimomura, T ;
Ito, K ;
Hashizume, T ;
Ishii, N ;
Aida, T .
SCIENCE, 2004, 304 (5676) :1481-1483
[93]   About supramolecular assemblies of π-conjugated systems [J].
Hoeben, FJM ;
Jonkheijm, P ;
Meijer, EW ;
Schenning, APHJ .
CHEMICAL REVIEWS, 2005, 105 (04) :1491-1546
[94]   Tunable command layers for liquid crystal alignment [J].
Hoogboom, J ;
Garcia, PML ;
Otten, MBJ ;
Elemans, JAAW ;
Sly, J ;
Lazarenko, SV ;
Rasing, T ;
Rowan, AE ;
Nolte, RJM .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2005, 127 (31) :11047-11052
[95]   Efficient light-harvesting layers of homeotropically aligned porphyrin derivatives [J].
Huijser, Annemarie ;
Savenije, Tom J. ;
Kotlewski, Arkadiusz ;
Picken, Stephen J. ;
Siebbeles, Laurens D. A. .
ADVANCED MATERIALS, 2006, 18 (17) :2234-+
[96]   THE NATURE OF PI-PI INTERACTIONS [J].
HUNTER, CA ;
SANDERS, JKM .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1990, 112 (14) :5525-5534
[97]   Electronic and ionic carrier transport in discotic liquid crystalline photoconductor [J].
Iino, H ;
Hanna, J ;
Haarer, D .
PHYSICAL REVIEW B, 2005, 72 (19)
[98]   High electron mobility of 0.1 cm2 V-1 s-1 in the highly ordered columnar phase of hexahexylthiotriphenylene -: art. no. 192105 [J].
Iino, H ;
Takayashiki, Y ;
Hanna, J ;
Bushby, RJ ;
Haarer, D .
APPLIED PHYSICS LETTERS, 2005, 87 (19) :1-3
[99]   Fast electron transport in discotic columnar phase of triphenylene derivative, hexabutyloxytriphenylene [J].
Iino, H ;
Hanna, J ;
Jäger, C ;
Haarer, D .
MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 2005, 436 :1171-1178
[100]   Very high time-of-flight mobility in the columnar phases of a discotic liquid crystal [J].
Iino, H ;
Hanna, J ;
Bushby, RJ ;
Movaghar, B ;
Whitaker, BJ ;
Cook, MJ .
APPLIED PHYSICS LETTERS, 2005, 87 (13) :1-3