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Implied Open‐circuit Voltage Imaging via a Single Bandpass Filter Method—Its First Application in Perovskite Solar Cells

Soufiani, Arman Mahboubi ; Lee-Chin, Robert; Fassl, Paul ORCID iD icon 1,2; Mahmud, Md Arafat; Pollard, Michael E.; Zheng, Jianghui; Weber, Juergen W.; Ho-Baillie, Anita; Trupke, Thorsten; Hameiri, Ziv
1 Lichttechnisches Institut (LTI), Karlsruher Institut für Technologie (KIT)
2 Institut für Mikrostrukturtechnik (IMT), Karlsruher Institut für Technologie (KIT)

Abstract:

A novel, camera-based method for direct implied open-circuit voltage (iV$_{OC}$) imaging via the use of a single bandpass filter (s-BPF) is developed for large-area photovoltaic solar cells and precursors. The photoluminescence (PL) emission is imaged using a narrow BPF with centre energy inside the high-energy tail of the PL emission, utilising the close-to-unity and nearly constant absorptivity of typical photovoltaic devices in this energy range. As a result, the exact value of the sample's absorptivity within the BPF transmission band is not required. The use of an s-BPF enables a fully contactless approach to calibrate the absolute PL photon flux for spectrally integrated detectors, including cameras. The method eliminates the need for knowledge of the imaging system spectral response. Through an appropriate choice of the BPF centre energy, a range of absorber compositions or a single absorber with different surface morphologies, such as planar and textured, can be imaged, all without the need for additional detection optics. The feasibility of this s-BPF method is first validated. The relative error in iV$_{OC}$ is determined to be ≤1.5%. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000153282
Veröffentlicht am 05.12.2022
Originalveröffentlichung
DOI: 10.1002/adfm.202210592
Scopus
Zitationen: 4
Web of Science
Zitationen: 3
Dimensions
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 1616-301X, 1057-9257, 1099-0712, 1616-3028
KITopen-ID: 1000153282
HGF-Programm 38.01.03 (POF IV, LK 01) Cell Design and Development
Erschienen in Advanced Functional Materials
Verlag Wiley-VCH Verlag
Band 33
Heft 3
Seiten Art.-Nr.: 2210592
Vorab online veröffentlicht am 18.11.2022
Schlagwörter contactless calibration, high-energy absorptivity, implied open-circuit voltage, luminescence imaging, single bandpass filter, solar cells
Nachgewiesen in Dimensions
Web of Science
Scopus
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