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Main Title: 27.9% Efficient Monolithic Perovskite/Silicon Tandem Solar Cells on Industry Compatible Bottom Cells
Author(s): Köhnen, Eike
Wagner, Philipp
Lang, Felix
Cruz, Alexandros
Li, Bor
Roß, Marcel
Jošt, Marko
Morales-Vilches, Anna B.
Topič, Marko
Stolterfoht, Martin
Neher, Dieter
Korte, Lars
Rech, Bernd
Schlatmann, Rutger
Stannowski, Bernd
Albrecht, Steve
Type: Article
Abstract: Monolithic perovskite/silicon tandem solar cells recently surpass the efficiency of silicon single‐junction solar cells. Most tandem cells utilize >250 μm thick, planarized float‐zone (FZ) silicon, which is not compatible with commercial production using <200 μm thick Czochralski (CZ) silicon. The perovskite/silicon tandem cells based on industrially relevant 100 μm thick CZ‐silicon without mechanical planarization are demonstrated. The best power conversion efficiency (PCE) of 27.9% is only marginally below the 28.2% reference value obtained on the commonly used front‐side polished FZ‐Si, which are about three times thicker. With both wafer types showing the same median PCE of 27.8%, the thin CZ‐Si‐based devices are preferred for economic reasons. To investigate perspectives for improved current matching and, therefore, further efficiency improvement, optical simulations with planar and textured silicon have been conducted: the perovskite's bandgap needs to be increased by ≈0.02 eV when reducing the silicon thickness from 280 to 100 μm. The need for bandgap enlargement has a strong impact on future tandem developments ensuring photostable compositions with lossless interfaces at bandgaps around or above 1.7 eV.
Subject(s): industry
tandem solar cells
Issue Date: 5-May-2021
Date Available: 17-Sep-2021
Is Part Of: 10.14279/depositonce-12324
Language Code: en
DDC Class: 600 Technik, Technologie
Sponsor/Funder: BMWi, 0324037C, Verbundvorhaben: Perowskit-Silizium Tandemsolarzellen (PersiST); Teilvorhaben: HET - Niedertemperatur-prozessierte Perowskitzellen und Perowskit/Silizium-Heterojunction-Tandemzellen
BMWi, 0324288C, Verbundvorhaben: ProTandem - Demonstration der Produktionstauglichkeit von Perowskit-Silizium Tandemsolarzellen; Teilvorhaben: Entwicklung von Kontaktschichten für die Silizium-Heterojunction Bottomzelle
BMBF, 03SF0540, Nachwuchsgruppe MeSa-Zuma: Entwicklung von spektral optimierten, hocheffizienten und langzeitstabilen Perowskit/Silizium Tandem Solarzellen
BMWi, 03EE1017C, Verbundvorhaben: P3T - Perowskit-POLO-PERC Tandemsolarzellen und -module; Teilvorhaben: Hocheffiziente Perowskit-Solarzellen für die Tandem-Integration auf PERC/POLO-Bottom-Zellen
Journal Title: Solar RRL
Publisher: Wiley
Volume: 5
Issue: 7
Article Number: 2100244
Publisher DOI: 10.1002/solr.202100244
EISSN: 2367-198X
TU Affiliation(s): Fak. 4 Elektrotechnik und Informatik » Inst. Hochfrequenz- und Halbleiter-Systemtechnologien » FG Perowskit Solarzellen
Appears in Collections:Technische Universität Berlin » Publications

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