title: Bio-photovoltaic conversion device using chlorine-e6 derived from chlorophyll from Spirulina adsorbed on a nanocrystalline TiO2 film electrode.
abstract: A bio-photovoltaic conversion device based on dye-sensitised solar cell (DSSC) using the visible light sensitisation of chlorine-e6 (Chl-e6) derived from chlorophyll from Spirulina adsorbed on a nanocrystalline TiO2 film was developed. Form fluorescence spectrum of Chl-e6 adsorbed on a nanocrystalline TiO2 film, the emission of Chl-e6 was effectively quenched by TiO2 nanocrystalline indicating that the effective electron injection from the excited singlet state of Chl-e6 into the conduction band of TiO2 particles occurred. The short-circuit photocurrent density (Isc). the open-circuit photovoltage (Voc). and the fill factor (FF) of solar cell using Chl-e6 adsorbed on a nanocrystalline TiO2 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 TiO2 film by Chl-e6 was developed.
authors.affiliation: Department of Applied Chemistry, Oita University, Dannoharu 700, Oita 870-1192, Japan. amao@cc.oita-u.ac.jp
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Amao
authors.forename: Tasuku
authors.initials: T
authors.lastname: Komori
mesh_terms: D001426:Bacterial Proteins / Q000378:metabolism*; D002734:Chlorophyll / Q000737:chemistry*; D002735:Chlorophyllides; D003460:Crystallization / Q000379:methods; D011211:Electric Power Supplies; D004563:Electrochemistry / Q000295:instrumentation* / Q000379:methods; D004566:Electrodes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D036103:Nanotechnology / Q000295:instrumentation / Q000379:methods; D010777:Photochemistry / Q000295:instrumentation* / Q000379:methods; D011166:Porphyrins / Q000737:chemistry*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D053545:Spirulina; D014025:Titanium / Q000737:chemistry*; D014159:Transducers
chemical_list: D001426:Bacterial Proteins; D002735:Chlorophyllides; D011166:Porphyrins; D002734:Chlorophyll; C009495:titanium dioxide; C062985:phytochlorin; D014025:Titanium