Water-based sonochemical cleaning in the manufacturing of high-efficiency photovoltaic cells

Autor(en)

A. Nadtochiy, Artem Podolian, Oleg Korotchenkov, Julian Schmid, Erika Kancsar, Viktor Schlosser

Abstrakt

We found that organic particle contaminants are effectively removed during ultrasonic cleaning in distilled water, as evidenced by the disappearance of organic-related absorption peaks and remarkable shortening of the surface photovoltage decay transients (SPV). SPV decay transient mappings obtained with a 100-μm spatial resolution (see abstract figure) show that, in multicrystalline Si wafers, the resulting effect on the decay time is markedly non-uniform compared with that observed in crystalline Si, implying the existence of a mechanism associated with the grain boundaries. The data are tentatively interpreted in terms of the wafer hydrogenization, which most probably occur through the grain boundaries. It is assumed that elevated temperatures inside a cavitating bubble may lead to water and bubble gas decomposition, accompanied by a subsequent trapping of the decomposed particulates at the silicon surface. These particulates can then be predominantly incorporated into the grain boundary regions. We suggest that this can be in part due to hydrogen molecules decomposed in water which are mobile in silicon.

Organisation(en)

Elektronische Materialeigenschaften

Externe Organisation(en)

Taras Shevchenko National University of Kyiv (KNU)

Journal

Physica Status Solidi C-Current Topics in Solid State Physics

Band

8

Seiten

2927-2930

Anzahl der Seiten

4

ISSN

1862-6351

DOI

https://doi.org/10.1002/pssc.201084062

Publikationsdatum

2011

Peer-reviewed

Ja

ÖFOS 2012

103009 Festkörperphysik, 103018 Materialphysik

Sustainable Development Goals

SDG 7 – Bezahlbare und saubere Energie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/564dc049-0076-46ae-bac8-7ea7e27299c0