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ECN publication
Title:
Enhanced light trapping in thin film silicon solar cells by zinc oxide nanorods
 
Author(s):
Zhang, D.; Petrov, M.; Dimova-Malinovska, D.; Dorenkamper, M.S.; Bakker, N.J.; Schropp, R.E.I.; Soppe, W.J.
 
Published by: Publication date:
ECN Solar Energy 22-9-2014
 
ECN report number: Document type:
ECN-M--14-052 Conference Paper
 
Number of pages: Full text:
3 Download PDF  

Abstract:
In this contribution, the ZnO nanorods (NRs) are demonstrated as a very effective light scattering medium at the rear side of nip thin-film silicon solar cells grown on flexible stainless steel foil. After the implementation of the ZnO NRs, the Haze of the back reflector is increased by about 40% at almost all wavelengths from 300 nm to 1200 nm. The Haze increases up to about 90% over the entire visible wavelength regime after the ZnO NRs are coated with the back reflector consisting of Ag and aluminum doped zinc oxide (AZO). Even in comparison to a reference cell with a nano-imprinted replica of Asahi-U texture at the rear side, the application of the ZnO NRs in the hydrogenated amorphous silicon (a-Si:H) solar cell can lead to a Jsc increase of 1.4 mA/cm2 and an absolute efficiency increase of 0.72%


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