Title :
Enhanced Field Emission Properties of Ag Nanoparticle-Decorated ZnO Nanorods Under Ultraviolet Illumination
Author :
Chih-Chiang Yang ; Yan-Kuin Su ; Ming-Yueh Chuang ; Hsin-Chieh Yu ; Chih-Hung Hsiao
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
In this paper, pure ZnO and Ag nanoparticle (NP)-decorated ZnO nanorods (NRs) were successfully synthesized via a low-temperature hydrothermal method. The as-prepared samples were characterized through high-resolution transmission electron microscopy and selected-area electron diffractometry. The enhanced field emission (FE) behavior of the Ag NP-decorated ZnO NRs along the [0002] crystal c-axis and their single-crystalline hexagonal structures were characterized with surface-protruding Ag NPs. The resulting FE in the dark and under ultraviolet illumination had low turn-ON electric fields of 3.93 and 2.04 V · μm-2, whereas the enhanced field enhancement factors were 1593 and 57872, respectively.
Keywords :
II-VI semiconductors; crystal growth from solution; crystal structure; field emission; nanofabrication; nanoparticles; nanorods; semiconductor growth; silver; transmission electron microscopy; wide band gap semiconductors; zinc compounds; ZnO; ZnO-Ag; [0002] crystal c-axis; dark ultraviolet illumination; electric fields; enhanced field emission properties; enhancement factors; high-resolution transmission electron microscopy; low-temperature hydrothermal method; selected-area electron diffractometry; silver nanoparticle-decorated ZnO nanorods; single-crystalline hexagonal structures; surface-protruding; ultraviolet illumination; II-VI semiconductor materials; Iron; Lighting; Nanowires; Substrates; Zinc oxide; Ag NP-decorated ZnO nanorods (NRs); field emission (FE); hydrothermal; hydrothermal.;
Journal_Title :
Electron Devices, IEEE Transactions on
DOI :
10.1109/TED.2015.2434886
