in detail of the architecture of a dye sensitised solar cell. Sandwiched between
two pieces of transparent glass, the tin oxide gives electron conductivity
to glass electrode. A layer of 2-15 um of nanostructured TiO2 anatase supports
by self-assembling technique the dye. Solid of liquid electrolyte affords
electron mobility and regeneration of dye molecules after light excitation
of picture below.
are based on a glass layer bearing a conductive tin oxyde layer. After a colloïdal
paste of 12 um thickness, containing TiO2 nanoparticles of 15-20 nm size,
is deposited on. Colloïdal paste is synthesised under hydrothermale conditions
at 70 atm from a mixture of water and Titanium isopropylate Ti(OiPr)4 with
dye deposition from an ethanolic solution, electrodes are heated to 450°C
for 10-20 min. To perform the light to electricity conversion we need a charge
collector and a system able to regenerate the excited dye. This last role
is played by the system I-/I3-.
The charge carrier role is played by organic salts of dialkyl-imidazolium
type or inorganic like lithium iodide.
measurements of photoinduced currents are made under the AM 1.5 standard (power
purification by column chromatography. Separation of different dyes and different