Photoluminescence imaging under sunlight excitation has in the recent years been proposed as a promising inspection technique of field-installed photovoltaic modules. Virtually, all studies have been conducted in full sunlight and clear sky conditions. A study in which photoluminescence images had been acquired at an irradiance level below 100 W m−2 using the lock-in technique has shown the potential of these images with respect to defect analysis. Additionally, as on-site measurement techniques are subject to weather conditions, it would be favorable to extend the applicability of photoluminescence imaging to a wider range of irradiance levels. A method for photoluminescence imaging which does not use the lock-in technique for the purpose of filtering of sunlight was proposed recently. The present study extends the application of this approach to diffuse irradiance conditions. We demonstrate that the method gives valuable information about the modules also in the case of image acquisition under diffuse global in-plane irradiance as low as 40 W m−2. Photoluminescence images acquired under low irradiance are comparable to electroluminescence images acquired at 10% of short-circuit current. Photoluminescence imaging has also been conducted successfully from the rear of bifacial modules in these illumination conditions.
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21 August 2023
Research Article|
August 16 2023
Photoluminescence imaging of field-installed photovoltaic modules in diffuse irradiance Available to Purchase
M. Vuković
;
M. Vuković
a)
(Conceptualization, Formal analysis, Investigation, Writing – original draft)
Faculty of Science and Technology, Norwegian University of Life Sciences
, Ås, Norway
a)Author to whom correspondence should be addressed: [email protected]
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M. Hillestad;
M. Hillestad
(Conceptualization, Investigation, Writing – review & editing)
Faculty of Science and Technology, Norwegian University of Life Sciences
, Ås, Norway
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M. Jakovljević
;
M. Jakovljević
(Conceptualization, Investigation, Writing – review & editing)
Faculty of Science and Technology, Norwegian University of Life Sciences
, Ås, Norway
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A. S. Flø
;
A. S. Flø
(Supervision, Writing – review & editing)
Faculty of Science and Technology, Norwegian University of Life Sciences
, Ås, Norway
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E. Olsen
;
E. Olsen
(Supervision, Writing – review & editing)
Faculty of Science and Technology, Norwegian University of Life Sciences
, Ås, Norway
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I. Burud
I. Burud
(Supervision, Writing – review & editing)
Faculty of Science and Technology, Norwegian University of Life Sciences
, Ås, Norway
Search for other works by this author on:
M. Vuković
Conceptualization, Formal analysis, Investigation, Writing – original draft
a)
Faculty of Science and Technology, Norwegian University of Life Sciences
, Ås, Norway
M. Hillestad
Conceptualization, Investigation, Writing – review & editing
Faculty of Science and Technology, Norwegian University of Life Sciences
, Ås, Norway
M. Jakovljević
Conceptualization, Investigation, Writing – review & editing
Faculty of Science and Technology, Norwegian University of Life Sciences
, Ås, Norway
A. S. Flø
Supervision, Writing – review & editing
Faculty of Science and Technology, Norwegian University of Life Sciences
, Ås, Norway
E. Olsen
Supervision, Writing – review & editing
Faculty of Science and Technology, Norwegian University of Life Sciences
, Ås, Norway
I. Burud
Supervision, Writing – review & editing
Faculty of Science and Technology, Norwegian University of Life Sciences
, Ås, Norway
a)Author to whom correspondence should be addressed: [email protected]
J. Appl. Phys. 134, 074903 (2023)
Article history
Received:
June 06 2023
Accepted:
July 28 2023
Citation
M. Vuković, M. Hillestad, M. Jakovljević, A. S. Flø, E. Olsen, I. Burud; Photoluminescence imaging of field-installed photovoltaic modules in diffuse irradiance. J. Appl. Phys. 21 August 2023; 134 (7): 074903. https://doi.org/10.1063/5.0160897
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