title: Broadband light-absorption InGaN photoanode assisted by imprint patterning and ZnO nanowire growth for energy conversion.
abstract: In this research, an InGaN-based photoanode with a broadband light-absorption range from ultraviolet to green, patterned by imprint lithography and branched by ZnO nanowires, has been applied to water splitting. Over the solar spectrum range, the absorbance increases due to the scattering effect of the micro-structure compared to that of flat surface InGaN, which reaches a maximum of over 90% at 380 nm as ZnO nanowires are further employed in this novel photoanode. Consequently, the induced photocurrent density of the InGaN photoanode with a domelike structure and ZnO nanowires on the surface shows a remarkable enhancement of seven times that of the one with a flat surface. Further investigation indicates the wet-etching process for defect removal has an essential impact on photocurrent efficiency. This design demonstrates an innovative approach for water splitting.
authors.affiliation: Department of Materials Science and Engineering, Korea University, Seoul 137-713, Korea.
authors.forename: Junjie
authors.initials: J
authors.lastname: Kang
authors.forename: Vinh Quang
authors.initials: VQ
authors.lastname: Dang
authors.forename: Hongjian
authors.initials: H
authors.lastname: Li
authors.forename: Sungjin
authors.initials: S
authors.lastname: Moon
authors.forename: Panpan
authors.initials: P
authors.lastname: Li
authors.forename: Yangdoo
authors.initials: Y
authors.lastname: Kim
authors.forename: Chaehyun
authors.initials: C
authors.lastname: Kim
authors.forename: Jinyoung
authors.initials: J
authors.lastname: Choi
authors.forename: Hakjong
authors.initials: H
authors.lastname: Choi
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Liu
authors.forename: Heon
authors.initials: H
authors.lastname: Lee