Reference : Photoluminescence assessment of materials for solar cell absorbers
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
http://hdl.handle.net/10993/52274
Photoluminescence assessment of materials for solar cell absorbers
English
Siebentritt, Susanne mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Rau, Uwe mailto [IEK5-Photovoltaik, Forschungszentrum Jülich, 52425 Jülich, Germany]
Gharabeiki, Sevan mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Weiss, Thomas mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Prot, Aubin Jean-Claude Mireille mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Wang, Taowen mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Adeleye, Damilola mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Drahem, Marwan Mohamed Mostafa mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Singh, Ajay mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
9-Jun-2022
Faraday Discussions
Royal Society of Chemistry
Yes
International
1359-6640
1364-5498
[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.
Fonds National de la Recherche - FnR
TAILS, PACE, MASSENA, SUNSPOT
Researchers ; Students
http://hdl.handle.net/10993/52274
10.1039/D2FD00057A
https://pubs.rsc.org/en/content/articlelanding/2022/fd/d2fd00057a
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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