Temperature-independent hole mobility in discotic liquid crystals

被引：74

作者：

Kreouzis, T

Donovan, KJ

Boden, N

Bushby, RJ

Lozman, OR

Liu, Q

机构：

[1] Queen Mary Univ London, London E1 4NS, England

[2] Univ Leeds, Sch Chem, Ctr Self Organising Mol Syst, Leeds LS2 9JT, W Yorkshire, England

来源：

JOURNAL OF CHEMICAL PHYSICS | 2001年 / 114卷 / 04期

关键词：

D O I：

10.1063/1.1334958

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Experimental measurements are presented of the hole mobilities of four conjugated discotic systems, forming columnar liquid crystals, as a function of temperature. The measurements cover the crystalline/glassy phase and mesophase of these materials. It is a remarkable fact that the mobility is almost independent of temperature in the range 30 degreesC-170 degreesC. Various explanations of a weak temperature dependence exist and these are explored. They include the small polaron of Holstein in the nonadiabatic limit and the effect of the dynamic disorder present in the system. (C) 2001 American Institute of Physics.

引用

页码：1797 / 1802

页数：6

共 19 条

[1] TRANSIENT PHOTOCONDUCTIVITY IN A DISCOTIC LIQUID-CRYSTAL [J].

ADAM, D ;

CLOSS, F ;

FREY, T ;

FUNHOFF, D ;

HAARER, D ;

RINGSDORF, H ;

SCHUHMACHER, P ;

SIEMENSMEYER, K .

PHYSICAL REVIEW LETTERS, 1993, 70 (04) :457-460

[2]

Arikainen EO, 2000, ANGEW CHEM INT EDIT, V39, P2333, DOI 10.1002/1521-3773(20000703)39:13<2333::AID-ANIE2333>3.0.CO

[3]

2-V

[4] Charge carrier generation in a dye sensitized liquid crystal [J].

Bilke, R ;

Schreiber, A ;

Bleyl, I ;

Haarer, D ;

Adam, D .

JOURNAL OF APPLIED PHYSICS, 2000, 87 (08) :3872-3877

[5] MECHANISM OF CHARGE-TRANSPORT IN DISCOTIC LIQUID-CRYSTALS [J].

BODEN, N ;

BUSHBY, RJ ;

CLEMENTS, J ;

MOVAGHAR, B ;

DONOVAN, KJ ;

KREOUZIS, T .

PHYSICAL REVIEW B, 1995, 52 (18) :13274-13280

[6] Transient photoconductivity and dark conductivity in discotic liquid crystals. [J].

Boden, N ;

Bushby, RJ ;

Cammidge, AN ;

Clements, J ;

Luo, R ;

Donovan, KJ .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1995, 261 :251-257

[7]

BODEN N, UNPUB LIQ CRYST

[8] Deconvolution of time of flight photocurrent transients and electronic response time in columnar liquid crystals [J].

Donovan, KJ ;

Kreouzis, T .

JOURNAL OF APPLIED PHYSICS, 2000, 88 (02) :918-923

[9] One dimensional carrier trapping in the crystalline phase of a columnar liquid crystal [J].

Donovan, KJ ;

Kreouzis, T ;

Boden, N ;

Clements, J .

JOURNAL OF CHEMICAL PHYSICS, 1998, 109 (23) :10400-10408

[10] EXACTLY SOLVABLE MODEL FOR COHERENT AND INCOHERENT EXCITON MOTION [J].

HAKEN, H ;

STROBL, G .

ZEITSCHRIFT FUR PHYSIK, 1973, 262 (02) :135-148

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