Journal Article

FZJ-2022-01762

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A route towards high‐efficiency silicon heterojunction solar cells

Duan, W. (Corresponding author)FZJ* ; Lambertz, A.FZJ* ; Bittkau, K.FZJ* ; Qiu, D.FZJ* ; Qiu, K. ; Rau, U.FZJ* ; Ding, K.FZJ*

2022
Wiley Chichester

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Please use a persistent id in citations: http://hdl.handle.net/2128/32698  doi:10.1002/pip.3493

Abstract: In this work, we propose a route to achieve a certified efficiency of up to 24.51% for silicon heterojunction (SHJ) solar cell on a full-size n-type M2 monocrystalline-silicon Cz wafer (total area, 244.53 cm2) by mainly improving the design of the hydrogenated intrinsic amorphous silicon (a-Si:H) on the rear side of the solar cell and the back reflector. A dense second intrinsic a-Si:H layer with an optimized thickness can improve the vertical carrier transport, resulting in an improved fill factor (FF). In order to reduce the plasmonic absorption at the back reflector, a low-refractive-index magnesium fluoride (MgF2) is deposited before the Ag layer; this leads to an improved gain of short circuit current density (Jsc). In total, together with MgF2 double antireflection coating and other fine optimizations during cell fabrication process, ~1% absolute efficiency enhancement is finally obtained. A detailed loss analysis based on Quokka3 simulation is presented to confirm the design principles, which also gives an outlook of how to improve the efficiency further.

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Contributing Institute(s):

1. Photovoltaik (IEK-5)

Research Program(s):

1. 1213 - Cell Design and Development (POF4-121) (POF4-121)
2. Verbundvorhaben: Street - Einsatz von hocheffizienten Solarzellen in elektrisch betriebenen Nutzfahrzeugen; Teilvorhaben: Herstellung und Entwicklung von (0324275E) (0324275E)
3. Verbundvorhaben: TuKaN - Tunnelkontakte auf N-Typ: für die Metallisierung mit Siebdruck, Teilvorhaben: Herstellung von Solarzellen mit passivierendem Tunnelkontakt und funktionalen Schichten aus katalytischer und plasmaunterstützter chemischer Gasphasenab (0324198D) (0324198D)
4. Touch - Technologie- und Charakterisierungsplattform für die Entwicklung von hoch-effizienten Silizium-Heterostruktursolarzellen (0324351) (0324351)

Appears in the scientific report 2022

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Essential Science Indicators ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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