Effect of ZnO seed layers on ZnO Nanorod growth

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Important Dates

Conference:

Aug. 18-20, 2018

Full Paper Due: Jul. 20, 2018

Abstract Due: Jul. 20, 2018

Audience Registration Due:
Aug. 18, 2018

Presentations of The Int'l Symposium on Photonics and Optoelectronics (SOPO 2016)

● Effect of ZnO seed layers on ZnO Nanorod growth
Author(s)
Qiyan Zhang
Affiliation(s)
Nagoya Institute of Technology
KEYWORDS
ZnO seed layers, ZnO Nanorod growth
ABSTRACT
Nano scaled one dimensional oxide semiconductors are responsive materials for electric devices. Zinc oxide (ZnO) nanorods are demonstrated to be applicable for optoelectronic devices such as ultraviolet (UV) laser(1), direct current nano generators(2), semiconductor sensitized solar cells(3) and active matrix liquid crystal display (4). In our previous studies, ZnO nanorods were also use to enhance light emission intensity of Powder Electroluminescence. Hydrothermal synthesis is a simple and economized approach, which enables the large production of ZnO nanorods at low temperature. In this method, ZnO nanorods are grown on seed layers prepared on the substrate (Fig.1). In the previous study on the formation of ZnO nanostructures through hydrothermal synthesis, the characteristic of ZnO seed layers is suggested to affect strongly on the structural parameters of produced nanostructures(5)(6). Here, we investigated the effect of seed layers on ZnO nanorods through the fabrication of ZnO nanorods on ZnO seed layers with controlled thickness and further annealing. ZnO seed layers were fabricated on c-axis sapphire substrate by Magnetron sputtering. The prepared layer was annealed at N2 atmosphere. The flatness and crystallinity of ZnO seed layer were observed to be improved by annealing at higher temperature and increasing thickness of the seed layer. Then, ZnO nanorods were fabricated on ZnO seed layers by hydrothermal synthesis. As a result, we found that size and filling rate of ZnO nanorods were influenced by crystallinity of seed layer. By tailoring seed layer condition, desired morphology of ZnO nanorods will be obtained, and consequently improvement or optimization of enhanced EL emission will be realized.