Nondispersive polaron transport in disordered organic solids -: art. no. 224303

被引:82
作者
Fishchuk, II
Kadashchuk, A
Bässler, H
Nespurek, S
机构
[1] Natl Acad Sci Ukraine, Inst Nucl Res, UA-03680 Kiev, Ukraine
[2] Natl Acad Sci Ukraine, Inst Phys, UA-03028 Kiev, Ukraine
[3] Univ Marburg, Inst Phys Nucl & Macromol Chem, D-35032 Marburg, Germany
[4] Univ Marburg, Ctr Mat Sci, D-35032 Marburg, Germany
[5] Acad Sci Czech Republ, Inst Macromol Chem, CR-16206 Prague 6, Czech Republic
来源
PHYSICAL REVIEW B | 2003年 / 67卷 / 22期
关键词
D O I
10.1103/PhysRevB.67.224303
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
An analytical theory based on the effective medium approach is formulated to describe nondispersive hopping charge transport in a disordered organic material where polaron effects are important. The treatment of polaron transport in solids with superimposed disorder and polaron effects is based on the Marcus jump rate equation, while the conventional Miller-Abrahams formalism is used to describe charge mobility in polaron-free systems. It is shown that the Poole-Frenkel-type field dependence of mobility ln muproportional torootE occurs for both the bare charge carrier and the polaron transport provided that energetic correlation effects have been taken into account. We show that our polaron model can quantitatively explain the observed magnitudes of temperature- and electric-field-dependent polaron mobilities assuming physically reasonable values of polaron binding energies and transfer integrals; it gives a background for the development of the method for estimation of polaron binding energy and the energetic disorder parameter from these dependences. The results of the calculations are found to be in good agreement with both experimental results obtained for some sigma-conjugated polysilylenes where polaron formation was straightforwardly demonstrated and recent computer simulations of polaron transport.
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页数:10
相关论文
共 39 条
[1]   A MODEL OF WEAK-FIELD QUASI-EQUILIBRIUM HOPPING TRANSPORT IN DISORDERED MATERIALS [J].
ARKHIPOV, VI ;
BASSLER, H .
PHILOSOPHICAL MAGAZINE LETTERS, 1993, 67 (05) :343-349
[2]   FIELD-DEPENDENT EFFECTIVE TEMPERATURE OF LOCALIZED CHARGE-CARRIERS IN HOPPING SYSTEMS WITH A RANDOM ENERGY-DISTRIBUTION [J].
ARKHIPOV, VI ;
BASSLER, H .
PHILOSOPHICAL MAGAZINE LETTERS, 1994, 69 (04) :241-246
[3]   AN ADIABATIC MODEL OF DISPERSIVE HOPPING TRANSPORT .2. DISPERSIVE CARRIER RECOMBINATION IN HOPPING SYSTEMS [J].
ARKHIPOV, VI ;
BASSLER, H .
PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1994, 70 (01) :59-66
[4]   AN ADIABATIC MODEL OF DISPERSIVE HOPPING TRANSPORT .1. GENERAL RESULTS FOR WEAK-FIELD DRIFT AND DIFFUSION [J].
ARKHIPOV, VI ;
BASSLER, H .
PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1993, 68 (04) :425-435
[5]   Polaron effects on thermally stimulated photoluminescence in disordered organic systems -: art. no. 165218 [J].
Arkhipov, VI ;
Emelianova, EV ;
Kadashchuk, A ;
Blonsky, I ;
Nespurek, S ;
Weiss, DS ;
Bässler, H .
PHYSICAL REVIEW B, 2002, 65 (16) :1652181-1652188
[6]   Charge-carrier transport in disordered organic solids [J].
Baranovskii, SD ;
Cordes, H ;
Hensel, F ;
Leising, G .
PHYSICAL REVIEW B, 2000, 62 (12) :7934-7938
[7]   CHARGE TRANSPORT IN DISORDERED ORGANIC PHOTOCONDUCTORS - A MONTE-CARLO SIMULATION STUDY [J].
BASSLER, H .
PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 1993, 175 (01) :15-56
[8]   CHARGE-TRANSPORT IN POLY(METHYLPHENYLSILANE) - THE CASE FOR SUPERIMPOSED DISORDER AND POLARON EFFECTS [J].
BASSLER, H ;
BORSENBERGER, PM ;
PERRY, RJ .
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 1994, 32 (09) :1677-1685
[9]  
Bassler H., 2000, SEMICONDUCTING POLYM, P365
[10]  
Borsenberger P. M., 1993, ORGANIC PHOTORECEPTO