Abstract
A bio-photovoltaic conversion device based on dye-sensitised solar cell (DSSC) using the visible light sensitisation of chlorine-e 6 (Chl-e 6) derived from chlorophyll from Spirulina adsorbed on a nanocrystalline TiO 2 film was developed. Form fluorescence spectrum of Chl-e 6 adsorbed on a nanocrystalline TiO 2 film, the emission of Chl-e 6 was effectively quenched by TiO 2 nanocrystalline indicating that the effective electron injection from the excited singlet state of Chl-e 6 into the conduction band of TiO 2 particles occurred. The short-circuit photocurrent density ( I SC), the open-circuit photovoltage ( V OC), and the fill factor (FF) of solar cell using Chl-e 6 adsorbed on a nanocrystalline TiO 2 film electrode were estimated to be 0.305±0.012 mA cm −2, 426±10 mV, and 45.0%, respectively. IPCE values were reached a maximum around the wavelength of absorption maximum (7.40% at 400 nm; 1.44% at 514 nm and 2.91% at 670 nm), indicating that the DSSC using visible light sensitisation of nanocrystalline TiO 2 film by Chl-e 6 was developed.
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