PERCOLATION APPROACH TO EXCITON DIFFUSION AND CARRIER DRIFT IN DISORDERED MEDIA

被引：20

作者：

SILVER, M ^{[1
]}

RISKO, K ^{[1
]}

BASSLER, H ^{[1
]}

机构：

[1] UNIV MARBURG,FACH PHYS CHEM,D-3550 MARBURG,FED REP GER

来源：

PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES | 1979年 / 40卷 / 03期

关键词：

D O I：

10.1080/13642817908246375

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Previous data on triplet exciton diffusion in high concentrations (>0·1) of naphthalene in durene melts and carrier drift in molecularly doped polymers are re-examined from a percolation point of view. This is a departure from the view that hopping sites in these disordered media can be represented as an ideal gas with the average distance between sites being a continuous function of the concentration and this average distance determining the diffusion rate. Instead, the correlated motion imposed by the random media, determines the rate of diffusion. From numerical modelling the rate of diffusion and drift is found to be proportional to (C-C0)1·8 where Co is the threshold concentration for percolation. Comparison with experiment shows excellent agreement. © 1979 Taylor & Francis Ltd.

引用

页码：247 / 252

页数：6

共 14 条

[1] ELECTRICAL CONDUCTIVITY IN DISORDERED SYSTEMS [J].

ADLER, D ;

FLORA, LP ;

SENTURIA, SD .

SOLID STATE COMMUNICATIONS, 1973, 12 (01) :9-12

[2]

BASSLER H, 1967, J CHEM PHYS, V47, P4007

[3]

BASSLER H, 1968, J CHEM PHYS, V49, P5198

[4]

DEGENNES PG, 1976, J PHYS LETT-PARIS, V37, pL1, DOI 10.1051/jphyslet:019760037010100

[5]

GILL WD, 1972, J APPL PHYS, V43, P5033, DOI 10.1063/1.1661065

[6] DIFFUSION OF TRIPLET EXCITONS IN ANTHRACENE [J].

KEPLER, RG ;

SWITENDICK, AC .

PHYSICAL REVIEW LETTERS, 1965, 15 (02) :56-+

[7]

KIRKPATRICK S, 1973, REV MOD PHYS, V45, P576

[8] SIMULATION OF HOPPING TRANSPORT FOR A RANDOM SPATIAL-DISTRIBUTION OF LOCALIZED SITES [J].

MARSHALL, JM .

PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1978, 38 (04) :335-348

[9]

MITESCU CD, 1978, AIP C P, V40, P377

[10] DISPERSIVE (NON-GAUSSIAN) TRANSIENT TRANSPORT IN DISORDERED SOLIDS [J].

PFISTER, G ;

SCHER, H .

ADVANCES IN PHYSICS, 1978, 27 (05) :747-798

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