Dispersion Relation and General Charge-Transport Model for Organic Semiconductors

Although organic semiconductors have been widely applied in many fields, their charge-transport mechanism has not been definitively confirmed. A dispersion relation is proposed herein for organic semiconductors, and the corresponding density of states (DOS) derived. The derived DOS can model experim...

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Bibliographic Details
Published inJournal of electronic materials Vol. 48; no. 5; pp. 2955 - 2961
Main Authors Jiang, Hao, Sun, Jiu-Xun, Yang, Hong-Chun
Format Journal Article
LanguageEnglish
Published New York Springer US 01.05.2019
Springer Nature B.V
Subjects
Boltzmann transport equation
Carrier density
Characterization and Evaluation of Materials
Charge transport
Chemistry and Materials Science
Density of states
Dispersion
Electronics and Microelectronics
Instrumentation
Materials Science
Mathematical analysis
Mathematical models
Optical and Electronic Materials
Organic semiconductors
Seebeck effect
Semiconductors
Solid State Physics
Transport properties
Seebeck coefficient
Boltzmann transport equation
mobility
dispersion relation
density of states
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Summary:Although organic semiconductors have been widely applied in many fields, their charge-transport mechanism has not been definitively confirmed. A dispersion relation is proposed herein for organic semiconductors, and the corresponding density of states (DOS) derived. The derived DOS can model experimental data for typical materials. The dispersion relation is combined with a general transport model based on the Boltzmann transport equation and considering the transport edge, then main transport properties can be evaluated. The numerical results for mobility versus carrier density and Seebeck coefficient versus conductivity are in good agreement with experimental data.
ISSN:0361-5235
1543-186X
DOI:10.1007/s11664-019-06953-w