Journal Article

FZJ-2014-04077

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Advancing tandem solar cells by spectrally selective multilayer intermediate reflectors

Hoffmann, A. (Corresponding Author)FZJ* ; Paetzold, U. W.FZJ* ; Zhang, C.FZJ* ; Merdzhanova, T.FZJ* ; Lambertz, A.FZJ* ; Ulbrich, C.FZJ* ; Bittkau, K.FZJ* ; Rau, U.FZJ*

2014
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1364/OE.22.0A1270

Abstract: Thin-film silicon tandem solar cells are composed of an amorphous silicon top cell and a microcrystalline silicon bottom cell, stacked and connected in series. In order to match the photocurrents of the top cell and the bottom cell, a proper photon management is required. Up to date, single-layer intermediate reflectors of limited spectral selectivity are applied to match the photocurrents of the top and the bottom cell. In this paper, we design and prototype multilayer intermediate reflectors based on aluminum doped zinc oxide and doped microcrystalline silicon oxide with a spectrally selective reflectance allowing for improved current matching and an overall increase of the charge carrier generation. The intermediate reflectors are successfully integrated into state-of-the-art tandem solar cells resulting in an increase of overall short-circuit current density by 0.7 mA/cm² in comparison to a tandem solar cell with the standard single-layer intermediate reflector.

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Contributing Institute(s):

1. Photovoltaik (IEK-5)

Research Program(s):

1. 111 - Thin Film Photovoltaics (POF2-111) (POF2-111)
2. HITEC - Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) (HITEC-20170406) (HITEC-20170406)

Appears in the scientific report 2014

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Database coverage:
; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection ; Zoological Record

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