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Nanostructured front electrodes for perovskite/c-Si tandem photovoltaics

Hossain, Ihteaz M. 1,2; Donie, Yidenekachew J. 1,2; Schmager, Raphael 2; Abdelkhalik, Mohamed S. 2; Rienäcker, Michael; Wietler, Tobias F.; Peibst, Robby; Karabanov, Andrei 1; Schwenzer, Jonas A. 1; Moghadamzadeh, Somayeh 1,2; Lemmer, Ulrich 1,2; Richards, Bryce S. ORCID iD icon 1,2; Gomard, Guillaume 1,2; Paetzold, Ulrich W. ORCID iD icon 1,2
1 Lichttechnisches Institut (LTI), Karlsruher Institut für Technologie (KIT)
2 Institut für Mikrostrukturtechnik (IMT), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

The rise in the power conversion efficiency (PCE) of perovskite solar cells has triggered enormous interest in perovskite-based tandem photovoltaics. One key challenge is to achieve high transmission of low energy photons into the bottom cell. Here, nanostructured front electrodes for 4-terminal perovskite/crystalline-silicon (perovskite/c-Si) tandem solar cells are developed by conformal deposition of indium tin oxide (ITO) on self-assembled polystyrene nanopillars. The nanostructured ITO is optimized for reduced reflection and increased transmission with a tradeoff in increased sheet resistance. In the optimum case, the nanostructured ITO electrodes enhance the transmittance by ∼7% (relative) compared to planar references. Perovskite/c-Si tandem devices with nanostructured ITO exhibit enhanced short-circuit current density (2.9 mA/cm2 absolute) and PCE (1.7% absolute) in the bottom c-Si solar cell compared to the reference. The improved light in-coupling is more pronounced for elevated angle of incidence. Energy yield enhancement up to ∼10% (relative) is achieved for perovskite/c-Si tandem architecture with the nanostructured ITO electrodes. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000117885
Veröffentlicht am 11.05.2020
DOI: 10.1364/OE.382253
Zitationen: 9
Web of Science
Zitationen: 8
Zitationen: 9
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 03.2020
Sprache Englisch
Identifikator ISSN: 1094-4087
KITopen-ID: 1000117885
HGF-Programm 43.23.04 (POF III, LK 01) Nanophotonics for Energy Conversion
Erschienen in Optics express
Verlag Optica Publishing Group (OSA)
Band 28
Heft 6
Seiten 8878-8897
Vorab online veröffentlicht am 13.03.2020
Nachgewiesen in Web of Science
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