title: Photoelectrochemical Properties of Vertically Aligned CuInS2 Nanorod Arrays Prepared via Template-Assisted Growth and Transfer.
abstract: Although copper-based chalcopyrite materials such as CuInS2 have been considered promising photocathodes for solar water splitting, the fabrication route for a nanostructure with vertical orientation has not yet been developed. Here, a fabrication route for vertically aligned CuInS2 nanorod arrays from an aqueous solution using anodic aluminum oxide template-assisted growth and transfer is presented. The nanorods exhibit a phase-pure CuInS2 chalcopyrite structure and cathodic photocurrent response without co-catalyst loading. Small particles of CdS and ZnS were conformally decorated onto CuInS2 nanorods using a successive ion layer adsorption and reaction method. With surface modification of CdS/ZnS, the photoelectrochemical properties of CuInS2 nanorod arrays are enhanced via flat-band potential shift, as determined by analyses of onset potential and Mott-Schottky plots.
authors.affiliation: Department of Materials Science and Engineering, Yonsei University , 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea.
authors.forename: Wooseok
authors.initials: W
authors.lastname: Yang
authors.affiliation: Department of Materials Science and Engineering, Yonsei University , 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea.
authors.forename: Yunjung
authors.initials: Y
authors.lastname: Oh
authors.affiliation: Department of Materials Science and Engineering, Yonsei University , 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea.
authors.forename: Jimin
authors.initials: J
authors.lastname: Kim
authors.affiliation: Department of Energy Science, Sungkyunkwan University , Suwon, Gyeonggi-do 440-746, Republic of Korea.
authors.forename: Hyunchul
authors.initials: H
authors.lastname: Kim
authors.affiliation: Department of Energy Science, Sungkyunkwan University , Suwon, Gyeonggi-do 440-746, Republic of Korea.
authors.forename: Hyunjung
authors.initials: H
authors.lastname: Shin
authors.affiliation: Department of Materials Science and Engineering, Yonsei University , 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea.
authors.forename: Jooho
authors.initials: J
authors.lastname: Moon
keywords: CuInS2; anodic aluminum oxide template; growth and transfer; nanorod arrays; photoelectrochemical water splitting; surface modification