title: Effects of ZnO Quantum Dots Decoration on the Field Emission Behavior of Graphene.
abstract: ZnO quantum dots (QDs) have been decorated on graphene deposited on patterned Ag electrodes as a field emission cathode by a solution process. Effects of ZnO QDs on the field emission behavior of graphene are studied by experiment and first-principles calculations. The results indicate that the attachment of ZnO QDs with a C atom leads to the enhancement of electron emission from graphene, which is mainly attributed to the reduction of the work function and ionization potential, and the increase of the Fermi level of graphene after the decoration. A change in the local density distribution and the density of states near the Fermi level may also account for this behavior. Our study may help to develop new field emission composites and expand ZnO QDs in applications for electron emission devices as well.
authors: National & Local United Engineer Laboratory of Flat Panel Display Technology, Fuzhou University , 350002 Fuzhou, China.|Zhicheng College, Fuzhou University , 350002 Fuzhou, China.
authors: Lei
authors: L
authors: Sun
authors: National & Local United Engineer Laboratory of Flat Panel Display Technology, Fuzhou University , 350002 Fuzhou, China.
authors: Xiongtu
authors: X
authors: Zhou
authors: National & Local United Engineer Laboratory of Flat Panel Display Technology, Fuzhou University , 350002 Fuzhou, China.
authors: Zhixian
authors: Z
authors: Lin
authors: National & Local United Engineer Laboratory of Flat Panel Display Technology, Fuzhou University , 350002 Fuzhou, China.
authors: Tailiang
authors: T
authors: Guo
authors: National & Local United Engineer Laboratory of Flat Panel Display Technology, Fuzhou University , 350002 Fuzhou, China.
authors: Yongai
authors: Y
authors: Zhang
authors: National & Local United Engineer Laboratory of Flat Panel Display Technology, Fuzhou University , 350002 Fuzhou, China.
authors: Yongzhi
authors: Y
authors: Zeng
keywords: ZnO quantum dots; field emission; first-principle density functional calculations; graphene; hybrid