Quantitative analysis of time-resolved microwave conductivity data

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

Research output: Contribution to journalReview article

25 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number493002
JournalJournal of Physics D: Applied Physics
Volume50
Issue number49
DOIs
Publication statusPublished - Nov 10 2017

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Keywords

  • COMSOL multiphysics
  • Conductivity
  • Dielectric constant
  • Materials
  • Microwave conductivity
  • Perovskite
  • Photovoltaics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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