Biomedical Engineering Reference
In-Depth Information
3-
COO
COOH
N
N
SCN
Ru
SCN
N
SCN
COO
FIGURE 22.3
“Black.dye”:.Common.rubidium-based.dye.used.for.DSSC.applications..Note.conjugated.π-bonding.system.and.
central.coordinated.metal.
from.the.photoanode..Due.to.the.very.low.electron-hole.recombination.probability.in.the.
semiconductor,.in.contrast.to,.e.g.,.Si-based.solar.cells,.DSSCs.work.even.under.low-light.
conditions, e.g.,.under.cloudy.skies.
22.2.3 Biosensitized Solar Cells
Biosensitized. solar. cells. (BSSCs). derive. their. inspiration. from. the. relatively. less. under-
stood.and.underappreciated.phenomenon.of.photon-triggered.electron.ejection.by.light-
activated. proteins.. DSSCs. and. BSSCs. differ. in. the. electron. donor-synthetic. (ruthenium.
II. complex). dye. in. the. former. and. light-activated. biomolecules. in. the. latter.. Similar. to.
DSSCs,.in.BSSCs.the.electron.acceptor.remains.an.SMO,.such.as.TiO 2 .or.ZnO.in.various.
e -
e -
TCO
Light
Red
Dye
Ox
Glass
Counter
electrode
Nanocrystalline
TiO 2
Electrolyte
FIGURE 22.4
Schematic.of.dye-sensitized.solar.cell..TCO.is.transparent.conductive.oxide..(Modiied.from.http://www.uni-
ulm.de/ileadmin/website_uni_ulm/nawi.inst.190/fotos_Farbstoffe/Farbstoffe_Figure_1_klein.JPG.)
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