Charge transport study of OPV polymers and their bulk heterojunction blends by admittance spectroscopy

Kevin K.H. Chan; Harrison K.H. Lee; Shu Kong SO

doi:10.1007/978-3-662-45509-8_2

Charge transport study of OPV polymers and their bulk heterojunction blends by admittance spectroscopy

Kevin K.H. Chan, Harrison K.H. Lee, Shu Kong SO^*

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Journal article › peer-review

Abstract

The measurement and understanding the conductivity/ mobility of an organic semiconductor is one of the most critical issues in organic electronics including organic solar cells. The standard “JV-approach” using space-charge-limited current model has clear drawbacks in evaluating the transport properties. In this chapter, we introduce an alternative transport characterization tool—admittance spectroscopy (AS), to extract charge carrier mobility in semiconducting polymers. The complex impedance of the polymer is obtained by exciting the sample (a thin film (~200–500 nm) sandwiched by two electrodes) with an ac voltage source and the analysis of measured time dependent current of the sample allows the extraction of carrier mobility. Examples of applications of AS to OPV polymers and their bulk heterojunction blends will be provided. The reliability of AS technique in OPV polymers will be compared to time-of-flight (TOF) method.

Original language	English
Pages (from-to)	43-65
Number of pages	23
Journal	Topics in Applied Physics
Volume	130
DOIs	https://doi.org/10.1007/978-3-662-45509-8_2
Publication status	Published - 2015

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Physics and Astronomy (miscellaneous)

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10.1007/978-3-662-45509-8_2

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title = "Charge transport study of OPV polymers and their bulk heterojunction blends by admittance spectroscopy",

abstract = "The measurement and understanding the conductivity/ mobility of an organic semiconductor is one of the most critical issues in organic electronics including organic solar cells. The standard “JV-approach” using space-charge-limited current model has clear drawbacks in evaluating the transport properties. In this chapter, we introduce an alternative transport characterization tool—admittance spectroscopy (AS), to extract charge carrier mobility in semiconducting polymers. The complex impedance of the polymer is obtained by exciting the sample (a thin film (~200–500 nm) sandwiched by two electrodes) with an ac voltage source and the analysis of measured time dependent current of the sample allows the extraction of carrier mobility. Examples of applications of AS to OPV polymers and their bulk heterojunction blends will be provided. The reliability of AS technique in OPV polymers will be compared to time-of-flight (TOF) method.",

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AU - Chan, Kevin K.H.

AU - Lee, Harrison K.H.

AU - SO, Shu Kong

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N2 - The measurement and understanding the conductivity/ mobility of an organic semiconductor is one of the most critical issues in organic electronics including organic solar cells. The standard “JV-approach” using space-charge-limited current model has clear drawbacks in evaluating the transport properties. In this chapter, we introduce an alternative transport characterization tool—admittance spectroscopy (AS), to extract charge carrier mobility in semiconducting polymers. The complex impedance of the polymer is obtained by exciting the sample (a thin film (~200–500 nm) sandwiched by two electrodes) with an ac voltage source and the analysis of measured time dependent current of the sample allows the extraction of carrier mobility. Examples of applications of AS to OPV polymers and their bulk heterojunction blends will be provided. The reliability of AS technique in OPV polymers will be compared to time-of-flight (TOF) method.

AB - The measurement and understanding the conductivity/ mobility of an organic semiconductor is one of the most critical issues in organic electronics including organic solar cells. The standard “JV-approach” using space-charge-limited current model has clear drawbacks in evaluating the transport properties. In this chapter, we introduce an alternative transport characterization tool—admittance spectroscopy (AS), to extract charge carrier mobility in semiconducting polymers. The complex impedance of the polymer is obtained by exciting the sample (a thin film (~200–500 nm) sandwiched by two electrodes) with an ac voltage source and the analysis of measured time dependent current of the sample allows the extraction of carrier mobility. Examples of applications of AS to OPV polymers and their bulk heterojunction blends will be provided. The reliability of AS technique in OPV polymers will be compared to time-of-flight (TOF) method.

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DO - 10.1007/978-3-662-45509-8_2

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JO - Topics in Applied Physics

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ER -

Charge transport study of OPV polymers and their bulk heterojunction blends by admittance spectroscopy

Abstract

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