Enhanced field emission of graphene-ZnO quantum dots hybrid structure - Details

author：

Sun, Lei (Sun, Lei.) ^[1] (Scholars：孙磊) | Zhou, Xiongtu (Zhou, Xiongtu.) ^[2] (Scholars：周雄图) | Zhang, Yongai (Zhang, Yongai.) ^[3] (Scholars：张永爱) | Guo, Tailiang (Guo, Tailiang.) ^[4] (Scholars：郭太良)

Indexed by：

EI Scopus SCIE

Abstract：

The　cathode　of　graphene　was　prepared　by　the　electrophoretic　deposition　(EPD)　and　ZnO　quantum　dots　(QDs)　were　grown　on　the　surface　of　graphene　sheets　by　solution　method　to　improve　the　field　emission　(FE)　properties.　The　graphene/ZnO　QDs　hybrid　emitters　exhibited　efficient　field　emission　with　lower　turn-on　field　of　0.9　V/mu　m,　lower　threshold　field　of　2.6　V/mu　m,　higher　field　enhancement　factor　of　3923　and　more　stable　emission　current　stability　than　pristine　graphene.　The　improved　field　emission　performance　was　attributed　to　ZnO　QDs,　which　introduce　more　defects,　increase　the　number　of　emitting　sites　and　decrease　the　work　function.　This　investigation　proposed　that　graphene/ZnO　QDs　composites　are　promising　field　cathodes　in　FE　applications.　(C)　2015　Elsevier　B.V.　All　rights　reserved.

Keyword：

Field emission Graphene Hybrid composites ZnO quantum dots

Community：

[ 1 ] [Sun, Lei]Fuzhou Univ, Zhicheng Coll, Fuzhou 350002, Peoples R China
[ 2 ] [Sun, Lei]Fuzhou Univ, Natl & Local United Engn Lab Flat Panel Display T, Fuzhou 350002, Peoples R China
[ 3 ] [Zhou, Xiongtu]Fuzhou Univ, Natl & Local United Engn Lab Flat Panel Display T, Fuzhou 350002, Peoples R China
[ 4 ] [Zhang, Yongai]Fuzhou Univ, Natl & Local United Engn Lab Flat Panel Display T, Fuzhou 350002, Peoples R China
[ 5 ] [Guo, Tailiang]Fuzhou Univ, Natl & Local United Engn Lab Flat Panel Display T, Fuzhou 350002, Peoples R China