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Updated: Jan 28, 2026

Extraction of the EPP Component from the Surface EMG
Published on: December 16, 2009
Extraction of source functions of surface photovoltage transients at very short times
Th Dittrich1, O Garcia Vera1, S Fengler2
1Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Institut für Si-Photovoltaik, Kekuléstr. 5, D-12489 Berlin, Germany.
Abstract:
The measurement of surface photovoltage (SPV) transients over 12 orders of magnitude in time was recently demonstrated [Rev. Sci. Instrum. 88, 053904 (2017)]. In dedicated experiments, however, a high-impedance buffer shall be placed outside the measurement chamber, which has consequences for SPV measurements at very short times. By varying the LCR circuit of a measurement configuration, applying a multi-parameter fit and simulating the corresponding SPV transients, we show, on the examples of highly doped silicon and a CdS thin film, that the source function of SPV transients can be reconstructed with a resolution time better than 1 ns.
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