Reference : Photoluminescence assessment of materials for solar cell absorbers

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	Focus Areas :	Physics and Materials Science
	To cite this reference:	http://hdl.handle.net/10993/52274

Title :	Photoluminescence assessment of materials for solar cell absorbers
Language :	English
Author, co-author :	Siebentritt, Susanne [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
	Rau, Uwe [IEK5-Photovoltaik, Forschungszentrum Jülich, 52425 Jülich, Germany]
	Gharabeiki, Sevan [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
	Weiss, Thomas [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
	Prot, Aubin Jean-Claude Mireille [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
	Wang, Taowen [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
	Adeleye, Damilola [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
	Drahem, Marwan Mohamed Mostafa [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
	Singh, Ajay [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Publication date :	9-Jun-2022
Journal title :	Faraday Discussions
Publisher :	Royal Society of Chemistry
Peer reviewed :	Yes
Audience :	International
ISSN :	1359-6640
e-ISSN :	1364-5498
Abstract :	[en] Absolute photoluminescence measurements present a tool to predict the quality of photovoltaic absorber materials before finishing the solar cells. Quasi Fermi level splitting predicts the maximal open circuit voltage. However, various methods to extract quasi Fermi level splitting are plagued by systematic errors in the range of 10–20 meV. It is important to differentiate between the radiative loss and the shift of the emission maximum. They are not the same and when using the emission maximum as the “radiative” band gap to extract the quasi Fermi level splitting from the radiative efficiency, the quasi Fermi level splitting is 10 to 40 meV too low for a typical broadening of the emission spectrum. However, radiative efficiency presents an ideal tool to compare different materials without determining the quasi Fermi level splitting. For comparison with the open circuit voltage, a fit of the high energy slope to generalised Planck’s law gives more reliable results if the fitted temperature, i.e. the slope of the high energy part, is close to the actual measurement temperature. Generalised Planck’s law also allows the extraction of a non-absolute absorptance spectrum, which enables a comparison between the emission maximum energy and the absorption edge. We discuss the errors and the indications when they are negligible and when not.
Funders :	Fonds National de la Recherche - FnR
Name of the research project :	TAILS, PACE, MASSENA, SUNSPOT
Target :	Researchers ; Students
Permalink :	http://hdl.handle.net/10993/52274
DOI :	10.1039/D2FD00057A
Other URL :	https://pubs.rsc.org/en/content/articlelanding/2022/fd/d2fd00057a
FnR project :	FnR ; FNR14735144 > Susanne Siebentritt > TAILS > How Tail States In The Absorber Influence And Limit Solar Cell Efficiency > 01/09/2021 > 31/08/2024 > 2020

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