Publication detail

Fast New Method for Temporary Chemical Passivation

SOLČANSKÝ, M. VANĚK, J. PORUBA, A.

Original Title

Fast New Method for Temporary Chemical Passivation

Type

journal article - other

Language

English

Original Abstract

The main material parameter of silicon, that influences the effectiveness of photovoltaic cells, is the minority carrier bulk lifetime. It may change in the technological process especially during high temperature operations. Monitoring of the carrier bulk-lifetime is necessary for modifying the whole technological process of production. For the measurement of the minority carrier bulk-lifetime the characterization method MW PCD (Microwave Photoconductance Decay) is used, where the result of measurement is the effective carrier lifetime, which is very dependent on the surface recombination velocity and therefore on the quality of a silicon surface passivation. sivation. This work deals with an examination of a different solution types for the chemical passivation of a silicon surface. Various solutions are tested on silicon wafers for their consequent comparison. The main purpose of this work is to find optimal solution, which suits the requirements of a time stability and start-up velocity of passivation, reproducibility of the measurements and a possibility of a perfect cleaning of a passivating solution remains from a silicon surface. Another purpose of this work is to identify the parameters of other quinhydrone solutions with different concentrations as compared with the quinhydrone solution in methanol with a concentration of 0.07 mol/dm3 marked QM007 (referential solution). The method of an effective chemical passivation with a quinhydrone in methanol solution was suggested. The solution with a concentration of 0.07 mol /dm3 fulfills all required criteria. The work also confirms the influence of increased concentration quinhydrone on the temporal stability of the passivation layer and the effect for textured silicon wafers. In conclusion, the influence of an illumination and the temperature on the properties of the passivating solution QM007 is discussed.

Keywords

chemical passivation, quinhydrone, carrier bulk- lifetime, Microwave Photoconductance Decay

Authors

SOLČANSKÝ, M.; VANĚK, J.; PORUBA, A.

RIV year

2013

Released

17. 5. 2013

Publisher

Acta Montanistica Slovaca

Location

Košice

ISBN

1335-1788

Periodical

Acta Montanistica Slovaca

Year of study

17

Number

4

State

Slovak Republic

Pages from

263

Pages to

267

Pages count

5

BibTex

@article{BUT99710,
  author="Marek {Solčanský} and Jiří {Vaněk} and Aleš {Poruba}",
  title="Fast New Method for Temporary Chemical Passivation",
  journal="Acta Montanistica Slovaca",
  year="2013",
  volume="17",
  number="4",
  pages="263--267",
  issn="1335-1788"
}