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Recycling of Photovoltaic Cells and other Si, Ge Elecronic Waste.

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    SYSNO ASEP0510208
    Druh ASEPC - Konferenční příspěvek (mezinárodní konf.)
    Zařazení RIVO - Ostatní
    NázevRecycling of Photovoltaic Cells and other Si, Ge Elecronic Waste.
    Tvůrce(i) Bumba, Jakub (UCHP-M) SAI
    Dřínek, Vladislav (UCHP-M) RID, SAI
    Fajgar, Radek (UCHP-M) RID, ORCID, SAI
    Kaštánek, František (UCHP-M) RID, SAI, ORCID
    Šolcová, Olga (UCHP-M) RID, ORCID, SAI
    Číslo článku082
    Zdroj.dok.Proceedings Sardinia 2019. - Padova : CISA Publisher, 2019
    Poč.str.6 s.
    Forma vydáníNosič - C
    AkceInternational Waste Management and Landfill Symposium /17./
    Datum konání30.09.2019 - 04.10.2019
    Místo konáníCagliari
    ZeměIT - Itálie
    Typ akceEUR
    Jazyk dok.eng - angličtina
    Země vyd.IT - Itálie
    Klíč. slovaelectronic waste recycling ; silicon ; germanium
    Vědní obor RIVCI - Průmyslová chemie a chemické inženýrství
    Obor OECDChemical process engineering
    CEPTN01000048 GA TA ČR - Technologická agentura České republiky
    Institucionální podporaUCHP-M - RVO:67985858
    AnotaceNew technology for electronic waste recycling to produce ultrapure silicon, germanium or CVD precursors was thoroughly studied, designed and verified. The three-step-process is based on low-temperature synthesis of magnesium silicide (Mg2Si) and/or germanide (Mg2Ge) directly from end-of-life photovoltaic cells and waste magnesium chips in the case of magnesium silicide and from broken germanium optical lenses and magnesium chips in the case of magnesium germanide preparation. The prepared products were characterised by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) with Energy Dispersive X-Ray Spectroscopy (EDX) and Raman spectroscopy, which confirmed high conversion to desired products, its good crystallinity and also homogeneity. Prepared samples were then hydrolysed by phosphoric acid solution to produce silicon and/or germanium hydrides. Their presence was confirmed by Fourier Transform Infrared Spectroscopy (FTIR) and Gas Chromatography–Mass Spectroscopy (GC-MS). In the next step, it was also tested that silicon and also germanium hydrides are relatively instable to the point that they can be easily decomposed into ultrapure elements Si, Ge and hydrogen. Additionally, it is possible to use them as desirable precursors for the preparation of thin silicon and germanium layers or for the synthesis of metal silicides and germanides by Chemical Vapour Deposition (CVD) methods. The thin semiconductive layers are commonly used in microelectronic industry, while metal silicides and germanides could find potential use in the field of catalysis, thermoelectricity and electronics. The only by-product of the whole process, magnesium phosphate, can be used as a fertilizer.
    PracovištěÚstav chemických procesů
    KontaktEva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
    Rok sběru2020
    Elektronická adresahttp://hdl.handle.net/11104/0300740
Počet záznamů: 1