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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/20774

Title: Passivation of photonic nanostructures for crystalline silicon solar cells
Authors: Trompoukis, Christos
El Daif, Ounsi
Sharma, Parikshit Pratim
Radhakrishnan, Hariharsudan Sivaramakrishnan
Debucquoy, Maarten
Depauw, Valerie
Van Nieuwenhuysen, Kris
Gordon, Ivan
Mertens, Robert
Poortmans, Jef
Issue Date: 2015
Citation: PROGRESS IN PHOTOVOLTAICS, 23 (6), p. 734-742
Abstract: We report on the optical and electrical performances of periodic photonic nanostructures, prepared by nanoimprint lithography (NIL) and two different etching routes, plasma, and wet chemical etching. Optically, these periodic nanostructures offer a lower integrated reflectance compared with the industrial state-of-the-art random pyramid texturing. However, electrically, they are known to be more challenging for solar cell integration. We propose the use of wet chemical etching for fabricating inverted nanopyramids as a way to minimize the surface recombination velocities and maintain a conventional cell integration flow. In contrast to the broadly used plasma etching for nanopatterning, the wet chemically etched nanopatterning results in low surface recombination velocities, comparable with the state-of-the-art random pyramid texturing. Applied to 40-mu m thick epitaxially grown crystalline silicon foils bonded to a glass carrier superstrate, the periodic-inverted nanopyramids show carrier lifetimes comparable with the non-textured reference foils ((eff)=250 mu s). We estimate a maximum effective surface recombination velocity of similar to 8cm/s at the patterned surface, which is comparable with the state-of-the-art values for crystalline silicon solar cells. Copyright (c) 2014 John Wiley & Sons, Ltd.
Notes: [Trompoukis, Christos; El Daif, Ounsi; Sharma, Parikshit Pratim; Radhakrishnan, Hariharsudan Sivaramakrishnan; Debucquoy, Maarten; Depauw, Valerie; Van Nieuwenhuysen, Kris; Gordon, Ivan; Mertens, Robert; Poortmans, Jef] IMEC, B-3001 Louvain, Belgium. [Trompoukis, Christos; Radhakrishnan, Hariharsudan Sivaramakrishnan; Mertens, Robert; Poortmans, Jef] KUL, Dept Elektrotech ESAT, B-3001 Louvain, Belgium. [Poortmans, Jef] UHasselt, B-3500 Hasselt, Belgium.
URI: http://hdl.handle.net/1942/20774
DOI: 10.1002/pip.2489
ISI #: 000353388800006
ISSN: 1062-7995
Category: A1
Type: Journal Contribution
Validation: ecoom, 2016
Appears in Collections: Research publications

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