 Photovoltaics
|
IMPLEMENTATION OF PHOTOVOLTAICS IN THE PHYSICS
COURSE AT THE UNIVERSITY OF VIENNA
V. Schlosser, G. Heine
Institut
für Materialphysik der Universität Wien
A-1090 Wien,
Strudlhofgasse 4, Austria, phone (++43 1) 586 3409, e-mail:
Viktor.Schlosser@Univie.ac.at
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- ABSTRACT:
-
As part of a second level experimental course in physics students
prepare a silicon solar cell. Beginning with a 3cm x 3cm
unpolished multicrystalline silicon wafer the students perform a
cleaning and polishing step. The n+p-junction is produced
by the use of a solid state phosphorous diffusion. For the
metallisation of the front and backside aluminum- and silverpastes
are used. The antireflection coating consists of a 80nm thick
silicon monoxide layer evaporated under high vacuum conditions.
Current voltage measurements are carried out in the dark and under
illumination. The solar cell parameters, short circuit current
density jsc, open circuit voltage Voc, maximal
electrical power output Pmax, load resistance Rload
and curve fill factor CFF, as well as the current loss mechanism
characterized by the diode parameters, saturation current density j0
and diode ideality factor n, the series resistance RS and
the shunt conductance GSH are determined. The best cell
obtained by the students exhibit a conversion efficiency of more
than eight per cent.
Keywords: Education and Training - 1: Multi-crystalline - 2:
Silicon - 3