Enhanced field emission properties from graphene-TiO2/DLC nanocomposite films prepared by ultraviolet-light assisted electrochemical deposition

被引：16

作者：

Jiang, Jinlong ^{[1
,2
]}

Du, Jinfang ^{[2
]}

Wang, Qiong ^{[2
]}

Zhang, Xia ^{[2
]}

Zhu, Weijun ^{[2
]}

Li, Ruishan ^{[2
]}

Yang, Hua ^{[2
]}

机构：

[1] Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China

[2] Lanzhou Univ Technol, Dept Phys, Lanzhou 730050, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 686卷

关键词：

Graphene; TiO2; Diamond-like carbon film; Electrochemical deposition; Ultraviolet light; Field emission; PHOTOLUMINESCENCE PROPERTIES; AMORPHOUS-CARBON; GRAPHENE; VOLTAGE;

D O I：

10.1016/j.jallcom.2016.06.084

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The graphene-TiO2/diamond-like carbon (G-TiO2/DLC) nanocomposite films were prepared on silicon substrates by a simple ultraviolet (UV) light assisted electrochemical deposition process using N, N-dimethylformamide (DMF) as carbon source and TiO2 nanoparticles/graphene sheets as incorporated reagents. The results show that the TiO2 and graphene sheets are uniformly dispersed into the DLC matrix. The UV-light illumination not only affects the morphology of the films, but also promotes the field emission properties, probably due to the effect of photoinduced electron-hole pairs produced from TiO2. The G-TiO2/DLC film exhibits the lowestturn-on field of 5.2 V/mu m and the highest current density of 2950 mu A/cm(2) at the electric field of 8.2 V/mu m. This enhancement of field emission properties are investigated based on the surface morphology of the self-assembled nanostructures, the improved conductivity, together with the reduced work function. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：588 / 592

页数：5

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