Quantitative analysis of time-resolved microwave conductivity data

Reid, Obadiah G.; Moore, David T.; Li, Zhen; Zhao, Dewei; Yan, Yanfa; Zhu, Kai; Rumbles, Garry

doi:10.1088/1361-6463/aa9559

Title: Quantitative analysis of time-resolved microwave conductivity data

Journal Article · Fri Nov 10 00:00:00 EST 2017 · Journal of Physics. D, Applied Physics

DOI:https://doi.org/10.1088/1361-6463/aa9559· OSTI ID:1414373

^[1]; Moore, David T. ^[2]; Li, Zhen ^[2]; Zhao, Dewei ^[3]; Yan, Yanfa ^[3]; Zhu, Kai ^[2];

^[4]

National Renewable Energy Lab. (NREL), Golden, CO (United States); Univ. of Colorado, Boulder, CO (United States)
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Univ. of Toledo, OH (United States). Wright Center for Photovoltaics Innovation and Commercialization (PVIC)
Univ. of Colorado, Boulder, CO (United States)

Flash-photolysis time-resolved microwave conductivity (fp-TRMC) is a versatile, highly sensitive technique for studying the complex photoconductivity of solution, solid, and gas-phase samples. The purpose of this paper is to provide a standard reference work for experimentalists interested in using microwave conductivity methods to study functional electronic materials, describing how to conduct and calibrate these experiments in order to obtain quantitative results. The main focus of the paper is on calculating the calibration factor, K, which is used to connect the measured change in microwave power absorption to the conductance of the sample. We describe the standard analytical formulae that have been used in the past, and compare them to numerical simulations. This comparison shows that the most widely used analytical analysis of fp-TRMC data systematically under-estimates the transient conductivity by ~60%. We suggest a more accurate semi-empirical way of calibrating these experiments. However, we emphasize that the full numerical calculation is necessary to quantify both transient and steady-state conductance for arbitrary sample properties and geometry.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S), SunShot Initiative; NREL Director's Fellowship Program

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1414373

Report Number(s):: NREL/JA-5900-68276; TRN: US1800698

Journal Information:: Journal of Physics. D, Applied Physics, Vol. 50, Issue 49; ISSN 0022-3727

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 61 works

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Title: Quantitative analysis of time-resolved microwave conductivity data

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