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Title: | Module-level Cell Processing of Silicon Heterojunction Interdigitated Back-Contacted (SHJ-IBC) Solar Cells with Efficiencies above 22%: Towards All-Dry Processing | Authors: | Radhakrishnan, Hariharsudan Sivaramakrishnan Bearda, Twan Xu, Menglei Jonnak, Shashi Kiran Malik, Shuja Hasan, Mahmudul DEPAUW, Valerie Filipic, Miha Van Nieuwenhuysen, Kris Abdulraheem, Yaser Debucquoy, Maarten GORDON, Ivan Szlufcik, Jozef POORTMANS, Jef |
Issue Date: | 2016 | Publisher: | IEEE | Source: | 2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC), IEEE,p. 1182-1187 | Series/Report: | IEEE Photovoltaic Specialists Conference | Abstract: | Module-level processing of silicon heterojunction interdigitated back-contacted (SHJ-IBC) solar cells while bonded to glass, in the so-called i2-module concept, is discussed. In this approach, a key challenge is the interdigitated patterning of aSi:H without compromising on the rear-surface passivation. Process adaptations involving more resistant bonding agents and a milder wet etchant enabled bonded cells with the best efficiency of 21.7% and VOC of 734 mV, which are the highest reported for bonded cells processed partially at module level, and which undoubtedly proves the potential of this i2-module concept to reach high Voc and efficiency. Yet another challenge is to make the process flow cost-effective and industrially-relevant, i.e. a lithofree, all-dry process flow, analogous to thin-film PV module fabrication. As a first step, dry etching of a-Si:H was developed to replace wet etching, and was successfully incorporated in a SHJIBC process flow to fabricate freestanding cells with the best efficiency of 22.9% and above 20% on thick (190 μm) and thin (56 μm) EVA-bonded silicon. | Notes: | Radhakrishnan, HS (reprint author), IMEC, Leuven, Belgium. | Keywords: | heterojunction solar cells; interdigitated backcontacted cells; amorphous silicon; charge carrier lifetime; surface passivation; module-level processing; bonding | Document URI: | http://hdl.handle.net/1942/23988 | ISBN: | 9781509027248 | DOI: | 10.1109/PVSC.2016.7749801 | ISI #: | 000399818701042 | Rights: | ©2016 IEEE | Category: | C1 | Type: | Proceedings Paper | Validations: | ecoom 2018 |
Appears in Collections: | Research publications |
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