Sensitization of nano-porous films of TiO2 with Santalin (cas 1397-70-2) (red sandalwood pigment) and construction of dye-sensitized solid-state photovoltaic cells

Add time:09/04/2019    Source:sciencedirect.com

Santalin (cas 1397-70-2), a pigment extracted from red sandalwood strongly surface complex to TiO2, sensitizing nano-porous film of TiO2 to the visible spectrum. Because of the stability of such films, dye-sensitized solid state photovoltaic cells of sandwich structure (nano-porous n-TiO2/santalin/p-type semiconductor) can be constructed by depositing p-CuI or p-CuCNS on santalin coated nano-porous films of TiO2. High stability of santalin complexed to TiO2 enables deposition of the p-type semiconductor without destroying the pigment layer. Light absorbed by the dye-molecules injects electrons into TiO2 and holes into CuI (or CuCNS) generating short-circuit photocurrent ∼6 mA/cm2 and photovoltage ∼450 mV at 800 W/m2 simulated sunlight.

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