High-Speed Measurements and Analysis of Complex Impedance Spectra of Polymer Light Emitting Diodes for Determination of Electronic Transport Properties

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  • OKADA Atsushi
    Department of Physics and Electronics, Osaka Prefecture University
  • NAITO Hiroyoshi
    The Research Institute for Molecular Electronic Devices (RIMED) Department of Applied Chemistry, Osaka Metropolitan University

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Other Title
  • インピーダンススペクトルの高速測定と高速解析による有機デバイスの電子物性評価
  • インピーダンススペクトル ノ コウソク ソクテイ ト コウソク カイセキ ニ ヨル ユウキ デバイス ノ デンシ ブッセイ ヒョウカ

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<p>We have experimentally shown that a measurement method based on time-stretched pulse (TSP) and fast Fourier transform (FFT) can reduce the data acquisition time of the complex impedance spectra of polymer light-emitting diodes (PLEDs);the data acquisition time of the present method is 3.0s while that of a conventional method using a lock-in detection technique without averaging is 48.9s. We have also demonstrated that the time required for the determination of drift mobility from the experimentally obtained complex impedance spectra is greatly reduced by a machine learning approach (the time required for the determination was 150s by means of manual analysis and 10ms by means of the machine learning approach). The measurement method using FFT and TSP and the mobility determination by the machine learning approach drastically reduced time and effort required for the determination of the electronic transport properties of organic semiconductors.</p>

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