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Study of carrier dynamics of N,N′-diphenyl-N,N′bis (1,1′-biphenyl)-4,4′-diamine (NPB) through the frequency dependence of impedance spectroscopy and particle swarm optimization algorithm

Published online by Cambridge University Press:  24 April 2014

Chao Tang ,
Xu-Liang Wang ,
Hui Xu ,
Rui-Lan Liu ,
Zhou Rong  and
Wei Huang
Chao Tang*
Affiliation:
Key Laboratory for Organic Electronics and Information Displays (KLOEID), Singapore-Jiangsu Joint Research Center for Organic/Bio Electronics & Information Displays (COEID), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, P.R. China
Xu-Liang Wang
Affiliation:
Key Laboratory for Organic Electronics and Information Displays (KLOEID), Singapore-Jiangsu Joint Research Center for Organic/Bio Electronics & Information Displays (COEID), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, P.R. China
Hui Xu
Affiliation:
Key Laboratory for Organic Electronics and Information Displays (KLOEID), Singapore-Jiangsu Joint Research Center for Organic/Bio Electronics & Information Displays (COEID), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, P.R. China
Rui-Lan Liu
Affiliation:
College of automation, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, P.R. China
Zhou Rong
Affiliation:
College of automation, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, P.R. China
Wei Huang
Affiliation:
Key Laboratory for Organic Electronics and Information Displays (KLOEID), Singapore-Jiangsu Joint Research Center for Organic/Bio Electronics & Information Displays (COEID), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, P.R. China
*
ae-mail: iamchaotang@gmail.com
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Abstract

In this paper, carrier dynamics in N,N′-diphenyl-N,N′bis(1,1′-biphenyl)-4,4′-diamine (NPB) was studied using impedance spectroscopy (IS) and particle swarm optimization algorithm (PSO). We applied PSO to fit the frequency dependence of impedance spectroscopy of NPB, and achieved the charge-carrier transit time and the dispersive parameters of NPB, and then obtained carrier mobility. The impacts of the dispersive degree on the impedance had been analyzed. Though PSO, the three unknown parameters, charge-carrier transit time τdc and dispersive degree M, α in the admittance model were achieved simultaneously. The results verified the reliability of this method. Furthermore, we have presented the advantages of PSO compared with the traditional nonlinear least squares algorithm. In our limited knowledge, this paper begins the work to study materials in the deep level of algorithm

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 66 , Issue 1 , April 2014 , 10202
Copyright
© EDP Sciences, 2014

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