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2D/3D Heterostructure for Semitransparent Perovskite Solar Cells with Engineered Bandgap Enables Efficiencies Exceeding 25% in Four‐Terminal Tandems with Silicon and CIGS

Gharibzadeh, Saba; Hossain, Ihteaz M.; Fassl, Paul; Nejand, Bahram Abdollahi; Abzieher, Tobias; Schultes, Moritz; Ahlswede, Erik; Jackson, Philip; Powalla, Michael; Schäfer, Sören; Rienäcker, Michael; Wietler, Tobias; Peibst, Robby; Lemmer, Uli; Richards, Bryce S.; Paetzold, Ulrich W.

Abstract:
Wide-bandgap perovskite solar cells (PSCs) with optimal bandgap (E$_{g}$) and high power conversion efficiency (PCE) are key to high-performance perovskite-based tandem photovoltaics. A 2D/3D perovskite heterostructure passivation is employed for double-cation wide-bandgap PSCs with engineered bandgap (1.65 eV ≤ E$_{g}$ ≤ 1.85 eV), which results in improved stabilized PCEs and a strong enhancement in open-circuit voltages of around 45 mV compared to reference devices for all investigated bandgaps. Making use of this strategy, semitransparent PSCs with engineered bandgap are developed, which show stabilized PCEs of up to 25.7% and 25.0% in fourterminal perovskite/c-Si and perovskite/CIGS tandem solar cells, respectively. Moreover, comparable tandem PCEs are observed for a broad range of perovskite bandgaps. For the first time, the robustness of the four-terminal tandem configuration with respect to variations in the perovskite bandgap for two state-of-the-art bottom solar cells is experimentally validated.

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Verlagsausgabe §
DOI: 10.5445/IR/1000120020
Veröffentlicht am 05.06.2020
Originalveröffentlichung
DOI: 10.1002/adfm.201909919
Scopus
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 05.2020
Sprache Englisch
Identifikator ISSN: 1616-301X, 1616-3028
KITopen-ID: 1000120020
Erschienen in Advanced functional materials
Band 30
Heft 19
Seiten Art. Nr.: 1909919
Vorab online veröffentlicht am 11.03.2020
Nachgewiesen in Scopus
Web of Science
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