Programm Photovoltaik Ausgabe 2008 ... - Bundesamt für Energie BFE

5/7
Work and results
SP2.4 – Nanolayering
Development of a fluorine doped tin oxide (FTO,
SnO2:F) coating technique on temperature
resistant polyimide.
The FTO is deposited by atmospheric pressure
chemical vapor deposition (APCVD) onto a temporary
substrate (typical size 5x5 cm) that is heat
resistant. Afterwards, a thin layer (ca 2-3 microns)
of polyimide precursor is spin-coated onto
the FTO layer and a firing at 400°C for 10 minutes
transforms the precursor solution into practically
transparent temperature resistant polyimide.
By selectively destroying the lift-off layer, the
FTO coated (~15 ohm/sq surface resistivity) polyimide
film is released.
SP2.6 - Nanoclustering
Opened high-pressure autoclave showing
the native nano-TiO2 suspension.
Various nano-TiO2 types deposited on
microscope slides as reference layers.
NAPOLYDE, T. Meyer, Solaronix
Nanocristalline TiO2 particles with a particle size
from 5 to 37 nm (pure anatase phase) have been
prepared by SOLARONIX as dispersions in vehicles
such as a water/alcohol mix, pure ethanol,
butanol- and terpineol-based screen-print vehicle.
The TiO2 was prepared with a hydrothermal
process allowing particle size selection with time
and temperature parameters during the autoclave
step (Oswald ripening). Sol-gel material
(Bohemite) received from CSEM was modified
for doctor-blade printing and a comparison TiO2
solution was prepared for a sublimation nanostructuring
experiment. Nano-TiO2-coated samples
have been prepared and delivered to (i)
SIEMENS regarding thermocatalytic effects, (ii)
ELCERAM for sensor applications, and to (iii)
CSEM for the CSEM "WIOS"-biochip for improving
device sensitivity.
Sampling of Partners (CSEM, ELCERAM, EADS,
SIEMENS, KONARKA TUW) with nanocristalline
TiO2 formulated to their specifications.
Thanks to the Ti-Nanoxide T20 product, the partner
ELCERAM was able to produce humidity
sensors having a linear response, simplifying the
sensor readout by the on-chip electronics.
About 30 different sorts of TiO2 materials have
been prepared so far to the various partners.
Seite 139 von 288