title: Peptide-templating dye-sensitized solar cells.
abstract: A hollow TiO(2) nanoribbon network electrode for dye-sensitized solar cells (DSSC) was fabricated by a biotemplating process combining peptide self-assembly and atomic layer deposition (ALD). An aromatic peptide of diphenylalanine was assembled into a three-dimensional network consisting of highly entangled nanoribbons. A thin TiO(2) layer was deposited at the surface of the peptide template via the ALD process. After the pyrolysis of the peptide template, a highly entangled nanotubular TiO(2) framework was successfully prepared. Evolution of the crystal phase and crystallite size of the TiO(2) nanostructure was exploited by controlling the calcination temperature. Finally, the hollow TiO(2) nanoribbon network electrode was integrated into DSSC devices and their photochemical performances were investigated. Hollow TiO(2) nanoribbon-based DSSCs exhibited a power conversion efficiency of 3.8%, which is comparable to the conventional TiO(2) nanoparticle-based DSSCs (3.5%). Our approach offers a novel pathway for DSSCs consisting of TiO(2) electrodes via biotemplating.
authors.affiliation: Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea.
authors.forename: Tae Hee
authors.initials: TH
authors.lastname: Han
authors.forename: Hyoung-Seok
authors.initials: HS
authors.lastname: Moon
authors.forename: Jin Ok
authors.initials: JO
authors.lastname: Hwang
authors.forename: Sang Il
authors.initials: SI
authors.lastname: Seok
authors.forename: Sang Hyuk
authors.initials: SH
authors.lastname: Im
authors.forename: Sang Ouk
authors.initials: SO
authors.lastname: Kim
mesh_terms: D001709:Biotechnology / Q000379:methods; D004151:Dipeptides; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods*; D010455:Peptides / Q000737:chemistry*; D010649:Phenylalanine / Q000031:analogs & derivatives / Q000737:chemistry; D010777:Photochemistry / Q000379:methods; D013696:Temperature; D014025:Titanium / Q000737:chemistry
chemical_list: D004151:Dipeptides; D010455:Peptides; C009495:titanium dioxide; C026650:phenylalanylphenylalanine; D010649:Phenylalanine; D014025:Titanium