Detailed luminescence modelling in high-efficiency solar cells for precise calibration of spatially resolved characterisation methods : a bottom-up opto-electrical approach

Kikelj, Miha (author), Bokalič, Matevž (author), Topič, Marko (author), Lipovšek, Benjamin (author)

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
• UDC: 621.383.51
• ISSN on article: 0927-0248
• DOI: 10.1016/j.solmat.2022.111990
• COBISS.SI-ID: 121928195
• Publication date in RUL: 12.01.2023

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

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