title: Dimensional-Hybrid Structures of 2D Materials with ZnO Nanostructures via pH-Mediated Hydrothermal Growth for Flexible UV Photodetectors.
abstract: Complementary combination of heterostructures is a crucial factor for the development of 2D materials-based optoelectronic devices. Herein, an appropriate solution for fabricating complementary dimensional-hybrid nanostructures comprising structurally tailored ZnO nanostructures and 2D materials such as graphene and MoS2is suggested. Structural features of ZnO nanostructures hydrothermally grown on graphene and MoS2are deliberately manipulated by adjusting the pH value of the growing solution, which will result in the formation of ZnO nanowires, nanostars, and nanoflowers. The detailed growth mechanism is further explored for the structurally tailored ZnO nanostructures on the 2D materials. Furthermore, a UV photodetector based on the dimensional-hybrid nanostructures is fabricated, which demonstrates their excellent photocurrent and mechanical durability. This can be understood by the existence of oxygen vacancies and oxygen-vacancies-induced band narrowing in the ZnO nanostructures, which is a decisive factor for determining their photoelectrical properties in the hybrid system.
authors.affiliation: Thin Film Materials Research Center, Korea Research Institute of Chemical Technology , Yuseong, P.O. Box 107, Daejeon 305-600, Republic of Korea.
authors.forename: Young Bum
authors.initials: YB
authors.lastname: Lee
authors.affiliation: Thin Film Materials Research Center, Korea Research Institute of Chemical Technology , Yuseong, P.O. Box 107, Daejeon 305-600, Republic of Korea.
authors.forename: Seong Ku
authors.initials: SK
authors.lastname: Kim
authors.affiliation: Thin Film Materials Research Center, Korea Research Institute of Chemical Technology , Yuseong, P.O. Box 107, Daejeon 305-600, Republic of Korea.
authors.forename: Yi Rang
authors.initials: YR
authors.lastname: Lim
authors.affiliation: Thin Film Materials Research Center, Korea Research Institute of Chemical Technology , Yuseong, P.O. Box 107, Daejeon 305-600, Republic of Korea.
authors.forename: In Su
authors.initials: IS
authors.lastname: Jeon
authors.affiliation: Thin Film Materials Research Center, Korea Research Institute of Chemical Technology , Yuseong, P.O. Box 107, Daejeon 305-600, Republic of Korea.
authors.forename: Wooseok
authors.identifier: http://orcid.org/0000-0002-0487-2055
authors.initials: W
authors.lastname: Song
authors.affiliation: Thin Film Materials Research Center, Korea Research Institute of Chemical Technology , Yuseong, P.O. Box 107, Daejeon 305-600, Republic of Korea.
authors.forename: Sung
authors.initials: S
authors.lastname: Myung
authors.affiliation: Thin Film Materials Research Center, Korea Research Institute of Chemical Technology , Yuseong, P.O. Box 107, Daejeon 305-600, Republic of Korea.
authors.forename: Sun Sook
authors.initials: SS
authors.lastname: Lee
authors.affiliation: Thin Film Materials Research Center, Korea Research Institute of Chemical Technology , Yuseong, P.O. Box 107, Daejeon 305-600, Republic of Korea.
authors.forename: Jongsun
authors.initials: J
authors.lastname: Lim
authors.affiliation: Thin Film Materials Research Center, Korea Research Institute of Chemical Technology , Yuseong, P.O. Box 107, Daejeon 305-600, Republic of Korea.
authors.forename: Ki-Seok
authors.initials: KS
authors.lastname: An
keywords: MoS2; ZnO nanostructure; dimensional hybrid; flexible photodetector; graphene; hydrothermal growth