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Detailed luminescence modelling in high-efficiency solar cells for precise calibration of spatially resolved characterisation methods : a bottom-up opto-electrical approach
ID Kikelj, Miha (Author), ID Bokalič, Matevž (Author), ID Topič, Marko (Author), ID Lipovšek, Benjamin (Author)

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Abstract
In the scope of solar cell characterisation, spatially resolved imaging (SRI) methods (EL, PL and LBIC) have long been a standard procedure for valuable in-depth evaluation and extraction of various spatially resolved material properties, especially those related to the electrical behaviour. While this extraction can be straightforward in the case of laterally homogeneous devices, the situation is vastly different when the structural features are laterally varying, such as in the case of interdigitated back contact (IBC) solar cells. We show that in the case of laterally varying devices inherent device optical properties play a far more important role in determining the measured profile in this case and may indeed overshadow any underlying electrical effects. We therefore propose and validate a methodology that couples SRI characterisation with advanced bottom-up simulation of IBC solar cells. The method fully accounts for lateral device variability and allows for accurate extraction of the underlying electrical phenomena. We demonstrate the applicability of the method on state-of-the-art high-efficiency IBC solar cells, and explain the key factors, which could lead to misinterpretation of the results obtained solely by SRI measurements.

Language:English
Keywords:spatially resolved imaging, electroluminescence, optical simulation, electrical simulation, interdigitated back contact solar cells
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FE - Faculty of Electrical Engineering
Publication status:Published
Publication version:Version of Record
Year:2022
Number of pages:11 str.
Numbering:Vol. 248, art. 111990
PID:20.500.12556/RUL-143799 This link opens in a new window
UDC:621.383.51
ISSN on article:0927-0248
DOI:10.1016/j.solmat.2022.111990 This link opens in a new window
COBISS.SI-ID:121928195 This link opens in a new window
Publication date in RUL:12.01.2023
Views:426
Downloads:76
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Record is a part of a journal

Title:Solar energy materials and solar cells
Shortened title:Sol. energy mater. sol. cells
Publisher:Elsevier
ISSN:0927-0248
COBISS.SI-ID:1089046 This link opens in a new window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

Language:Slovenian
Keywords:prostorska slikovna karakterizacija, elektroluminiscenca, optične simulacije, električne simulacije, sončne celice z izmenjujočimi kontakti na zadnji strani

Projects

Funder:EC - European Commission
Funding programme:H2020
Project number:857793
Name:High-performance low-cost modules with excellent environmental profiles for a competitive EU PV manufacturing industry
Acronym:HighLite

Funder:ARRS - Slovenian Research Agency
Project number:P2-0197
Name:Fotovoltaika in elektronika

Funder:ARRS - Slovenian Research Agency
Project number:P2-0415
Name:Fotovoltaika in elektronika

Funder:ARRS - Slovenian Research Agency
Funding programme:Young researchers

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