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Passivation effect of water vapour on thin film polycrystalline Si solar cells
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SYSNO ASEP 0469471 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Passivation effect of water vapour on thin film polycrystalline Si solar cells Author(s) Pikna, Peter (FZU-D) RID
Müller, Martin (FZU-D) RID, ORCID
Becker, C. (DE)
Fejfar, Antonín (FZU-D) RID, ORCID, SAINumber of authors 4 Source Title Physica Status Solidi A : Applications and Materials Science. - : Wiley - ISSN 1862-6300
Roč. 213, č. 7 (2016), s. 1969-1975Number of pages 6 s. Language eng - English Country DE - Germany Keywords passivation, ; plasma hydrogenation ; silicon ; solar cells ; thin films ; water vapour Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects LM2015087 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA13-12386S GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 UT WOS 000385222900048 EID SCOPUS 84992299642 DOI https://doi.org/10.1002/pssa.201533006 Annotation We investigated a passivation of both surface and bulk of polycrystalline silicon films by water vapour by Suns-VOC method to measure the open-circuit voltage. A sufficiently high temperature (350–450 °C) is necessary for a successful silicon passivation. Different gases were tested beside water vapour (H2, H2 + H2O, O2 + H2O, air) but none of them resulted in higher VOC than pure steam (360 mV from starting 220 mV). Results from Fourier transform infrared spectroscopy indicate that water vapour passivation is rather oxidation while hydrogen plays a significant supporting role in the process. Water vapour is able to passivate defects in the whole silicon volume, but its passivation effect is not strong enough to become an adequate alternative to the plasma hydrogenation with the best result of VOC ∼497 mV. On the other hand, it provides advantage of simplicity (no vacuum system and deionised water steam as the only input). Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2017
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