Energy-level variations of Cu-doped ZnO fabricated through sol-gel processing

被引：43
作者：
Liau, Leo Chau-Kuang [1 ]
Huang, Ji-Siou [1 ]
机构：
[1] Yuan Ze Univ, Dept Chem Engn & Mat Sci, Taoyuan 32003, Taiwan
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 702卷
关键词：
Cu-doped ZnO; Energy level; Electrical resistivity; Sol-gel processing; THIN-FILMS; OPTICAL-PROPERTIES; ELECTRICAL-PROPERTIES; NANOPARTICLES; OXIDE; NANOSTRUCTURES;
D O I：
10.1016/j.jallcom.2017.01.174
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：
We evaluated the properties and energy levels of Cu-doped ZnO (CZO) crystals synthesized in different Cu ion additions through sol-gel processing. Different CZO crystals were synthesized with Zn-OH and Cu OH as precursors under sol-gel reactions in base solutions. The properties of the synthesized CZO samples were characterized and the energy levels of the samples were determined. Results showed that the grain size and bandgap energy (E-g) of the CZO crystals decreased, as the proportion of Cu in the ZnO increased. The lattice volume of the CZO crystals was distorted in the presence of Cu. The lowest resistivity of the CZO sample films was determined for the CZO sample with 3% Cu addition (3CZO). The conduction band energy (Er), valence band energy (E-v), and Fermi energy (E-F) levels were estimated and varied because of the presence of Cu in ZnO. The lower resistivity of CZO was analyzed and attributed to the energy level variations that occurred on the basis of the lattice distortion in the CZO crystals. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：153 / 160
页数：8
相关论文
共 30 条
[1]   Structural and optical characterization and efficacy of hydrothermal synthesized Cu and Ag doped zinc oxide nanoplate bactericides [J].
Abinaya, C. ;
Marikkannan, M. ;
Manikandan, M. ;
Mayandi, J. ;
Suresh, P. ;
Shanmugaiah, V. ;
Ekstrum, C. ;
Pearce, J. M. .
MATERIALS CHEMISTRY AND PHYSICS, 2016, 184 :172-182
[2]   Visible light responsive noble metal-free nanocomposite of V-doped TiO2 nanorod with highly reduced graphene oxide for enhanced solar H2 production [J].
Agegnehu, Abiye Kebede ;
Pan, Chun-Jern ;
Tsai, Meng-Che ;
Rick, John ;
Su, Wei-Nien ;
Lee, Jyh-Fu ;
Hwang, Bing Joe .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2016, 41 (16) :6752-6762
[3]   Hierarchical ZnO/Cu "corn-like" materials with high photodegradation and antibacterial capability under visible light [J].
Bai, Hongwei ;
Liu, Zhaoyang ;
Sun, Darren Delai .
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2011, 13 (13) :6205-6210
[4]   Electrical Properties of CZO Films Prepared by Ultrasonic Spray Pyrolysis [J].
Chen, Lung-Chien ;
Hsieh, Cheng-An ;
Zhang, Xiuyu .
MATERIALS, 2014, 7 (11) :7304-7313
[5]   Interplay of Cu and oxygen vacancy in optical transitions and screening of excitons in ZnO:Cu films [J].
Darma, Yudi ;
Herng, Tun Seng ;
Marlina, Resti ;
Fauziah, Resti ;
Ding, Jun ;
Rusydi, Andrivo .
APPLIED PHYSICS LETTERS, 2014, 104 (08)
[6]   Oxide Semiconductor Thin-Film Transistors: A Review of Recent Advances [J].
Fortunato, E. ;
Barquinha, P. ;
Martins, R. .
ADVANCED MATERIALS, 2012, 24 (22) :2945-2986
[7]   Sol-gel preparation and enhanced photocatalytic performance of Cu-doped ZnO nanoparticles [J].
Fu, Min ;
Li, Yalin ;
Wu, Siwei ;
Lu, Peng ;
Liu, Jing ;
Dong, Fan .
APPLIED SURFACE SCIENCE, 2011, 258 (04) :1587-1591
[8]   Highly luminescent ultra small Cu doped ZnO nanostructures grown by ultrasonicated sol-gel route [J].
Gahlaut, U. P. S. ;
Kumar, Vijay ;
Pandey, R. K. ;
Goswami, Y. C. .
OPTIK, 2016, 127 (10) :4292-4295
[9]   Nano-crystalline Cu-doped ZnO thin film gas sensor for CO [J].
Gong, H ;
Hu, JQ ;
Wang, JH ;
Ong, CH ;
Zhu, FR .
SENSORS AND ACTUATORS B-CHEMICAL, 2006, 115 (01) :247-251
[10]   Optical and magnetic properties of Cu-doped ZnO nanoparticles [J].
Hammad, Talaat M. ;
Salem, Jamil K. ;
Harrison, Roger G. ;
Hempelmann, Rolf ;
Hejazy, Nasser K. .
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2013, 24 (08) :2846-2852
123