title: Facile fabrication of sub-100 nm mesoscale inverse opal films and their application in dye-sensitized solar cell electrodes.
abstract: Inverse opal (IO) films with mesoporous structures hold promise as high-performance electrodes for various photoelectrochemical devices because of their high specific area as well as their fully connected pore structure. A great challenge to their use is obtaining an intact film of mesoscale colloidal crystals as a template. Here, using the plate-sliding coating method coupled with hot air flow, we successfully deposited mesoscale colloidal crystals onto the substrate. A TiO2 mesoscale IO (meso-IO) with 70 nm pores was then successfully fabricated via atomic layer deposition of TiO2 and subsequent removal of the template. As a photoelectrochemical electrode, the meso-IO structure exhibits enhanced charge transport properties as well as a high specific area. Moreover, dye-sensitized solar cells fabricated using the meso-IO electrode exhibit a higher photocurrent and cell efficiency than a cell constructed using a conventional TiO2 nanoparticle electrode. This meso-IO film provides a new platform for developing electrodes for use in various energy storage and conversion devices.
authors.affiliation: Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 121-742, Republic of Korea.
authors.forename: Jung Woo
authors.initials: JW
authors.lastname: Lee
authors.affiliation: Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 121-742, Republic of Korea.
authors.forename: Jaemin
authors.initials: J
authors.lastname: Lee
authors.affiliation: Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 121-742, Republic of Korea.
authors.forename: Cheolho
authors.initials: C
authors.lastname: Kim
authors.affiliation: Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 121-742, Republic of Korea.
authors.forename: Chang-Yeol
authors.initials: CY
authors.lastname: Cho
authors.affiliation: Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 121-742, Republic of Korea.
authors.forename: Jun Hyuk
authors.initials: JH
authors.lastname: Moon