Journal Article

FZJ-2021-05219

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Combining Modulated Techniques for the Analysis of Photosensitive Devices

Alvarez, A. O. (Corresponding author)Extern* ; Ravishankar, S.FZJ* ; Fabregat-Santiago, F. (Corresponding author)Extern*

2021
WILEY-VCH Verlag GmbH & Co. KGaA Weinheim

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Please use a persistent id in citations: http://hdl.handle.net/2128/29607  doi:10.1002/smtd.202100661

Abstract: Small perturbation techniques such as impedance spectroscopy (IS), intensity-modulated photocurrent spectroscopy (IMPS) and intensity-modulated photovoltage spectroscopy (IMVS) are useful tools to characterize and model the optoelectronic properties of photovoltaic and photoelectrochemical devices. The analysis of the impedance spectra is generally carried out through the modeling of the internal processes occurring in the device with an equivalent circuit. Whereas the analysis of the intensity-modulated spectroscopies is often focused on the characteristic response times that are associated with physical mechanisms such as recombination or transport. In this work, we propose a procedure to analyze photosensitive devices by combining these three techniques. This procedure allows the accurate identification of the common equivalent circuit and the subsequent application to fitting the three spectra. As a result, together with the electrical parameters associated to charge transport, accumulation and recombination, it is possible to obtain optoelectronic parameters such as the charge separation efficiency, external and internal quantum efficiency. Our theoretical approach is experimentally applied in the characterization of a silicon photodiode, illustrating the intrinsical relationship between these techniques. This procedure has a great potential to contribute to the characterization and understanding of the operating principles that govern the response of photoactive devices.

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Contributing Institute(s):

1. Photovoltaik (IEK-5)

Research Program(s):

1. 121 - Photovoltaik und Windenergie (POF4-121) (POF4-121)
2. 1215 - Simulations, Theory, Optics, and Analytics (STOA) (POF4-121) (POF4-121)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 10 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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