Field emission property improvement of ZnO nanowires coated with amorphous carbon and carbon nitride films

被引:85
作者
Liao, L
Li, JC [1 ]
Wang, DF
Liu, C
Liu, CS
Fu, Q
Fan, LX
机构
[1] Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China
[2] Wuhan Univ, Ctr Electron Microscopy, Wuhan 430072, Peoples R China
[3] Wuhan Univ, Ctr Nanosci & Nanotechnol Res, Wuhan 430072, Peoples R China
关键词
D O I
10.1088/0957-4484/16/6/061
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
In this paper, we report an approach to prepare a new type of field emitter made up of ZnO nanowires coated with an amorphous carbon (a-C) or carbon nitride film (a-CNx). The coated ZnO nanowires form coaxial nanocables. The best field emission properties, which showed a very low turn-on electric field of 1.5 V mu m(-1) and an emission current density of 1 mA cm(-2) (enough to produce a luminance of 300 cd m(-2) from a VGA FED with a typical high-voltage phosphor screen efficacy of 9 1m W-1) under the field of only 2.5 V mu m(-1), have been obtained from the a-CNx, coated ZnO nanowire field emitter among three kinds of emitters: a-C coated ZnO nanowires, a-CNx coated ZnO nanowires and uncoated ZnO nanowires. Microstructures and crystal configuration were investigated by scanning electron microscopy, x-ray diffraction and transmission electron microscopy. Band edge transition without any significant photoluminescence peak relating to intrinsic defects has been observed by photoluminescence measurement. The superior properties of the field emission are attributed to the low work function of the coated carbon nitride film and good electron transport property of the ZnO nanowires with an extremely sharp tip.
引用
收藏
页码:985 / 989
页数:5
相关论文
共 23 条
[1]   Fabrication of amorphous-carbon-nitride field emitters [J].
Chi, EJ ;
Shim, JY ;
Baik, HK ;
Lee, SM .
APPLIED PHYSICS LETTERS, 1997, 71 (03) :324-326
[2]   Nanowire nanosensors for highly sensitive and selective detection of biological and chemical species [J].
Cui, Y ;
Wei, QQ ;
Park, HK ;
Lieber, CM .
SCIENCE, 2001, 293 (5533) :1289-1292
[3]   A CARBON NANOTUBE FIELD-EMISSION ELECTRON SOURCE [J].
DEHEER, WA ;
CHATELAIN, A ;
UGARTE, D .
SCIENCE, 1995, 270 (5239) :1179-1180
[4]   ZnO nanowires formed on tungsten substrates and their electron field emission properties [J].
Dong, LF ;
Jiao, J ;
Tuggle, DW ;
Petty, JM ;
Elliff, SA ;
Coulter, M .
APPLIED PHYSICS LETTERS, 2003, 82 (07) :1096-1098
[5]   Surface acoustic wave ultraviolet photodetectors using epitaxial ZnO multilayers grown on r-plane sapphire [J].
Emanetoglu, NW ;
Zhu, J ;
Chen, Y ;
Zhong, J ;
Chen, YM ;
Lu, YC .
APPLIED PHYSICS LETTERS, 2004, 85 (17) :3702-3704
[6]   Zinc oxide and its anion: A negative ion photoelectron spectroscopic study [J].
Fancher, CA ;
de Clercq, HL ;
Thomas, OC ;
Robinson, DW ;
Bowen, KH .
JOURNAL OF CHEMICAL PHYSICS, 1998, 109 (19) :8426-8429
[7]  
Gu GR, 2003, CHINESE PHYS LETT, V20, P947, DOI 10.1088/0256-307X/20/6/349
[8]   Room-temperature ultraviolet nanowire nanolasers [J].
Huang, MH ;
Mao, S ;
Feick, H ;
Yan, HQ ;
Wu, YY ;
Kind, H ;
Weber, E ;
Russo, R ;
Yang, PD .
SCIENCE, 2001, 292 (5523) :1897-1899
[9]   Solar cells based on carbon thin films [J].
Krishna, KM ;
Nukaya, Y ;
Soga, T ;
Jimbo, T ;
Umeno, M .
SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2001, 65 (1-4) :163-170
[10]   Field emission from well-aligned zinc oxide nanowires grown at low temperature [J].
Lee, CJ ;
Lee, TJ ;
Lyu, SC ;
Zhang, Y ;
Ruh, H ;
Lee, HJ .
APPLIED PHYSICS LETTERS, 2002, 81 (19) :3648-3650