TY  - JOUR
AU  - Hoffmann, Andre
AU  - Paetzold, Ulrich W.
AU  - Zhang, Chao
AU  - Merdzhanova, Tsvetelina
AU  - Lambertz, Andreas
AU  - Ulbrich, Carolin
AU  - Bittkau, Karsten
AU  - Rau, Uwe
TI  - Advancing tandem solar cells by spectrally selective multilayer intermediate reflectors
JO  - Optics express
VL  - 22
IS  - S5
SN  - 1094-4087
CY  - Washington, DC
PB  - Soc.
M1  - FZJ-2014-04077
SP  - A1270
PY  - 2014
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000340717300007
DO  - DOI:10.1364/OE.22.0A1270
UR  - https://juser.fz-juelich.de/record/154809
ER  -