Conductive-perovskite LaNiO3 thin films prepared by using solution process for electrode application

Nguyen, Quang Hoa and Bui, Nguyen Quoc Trinh (2018) Conductive-perovskite LaNiO3 thin films prepared by using solution process for electrode application. Journal of Science: Mathematics-Physics . ISSN 0866-8612 (In Press)

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Abstract

: Lanthanum nickel oxide LaNiO3 (LNO) is extensively known as one of typical perovskite-structured materials with metallic conductivity, which is suitable for the electrode application in electronic devices such as transistors or solar cells. Since LNO is a low-cost material and a simple fabrication process, it has been attracted much attention for commercialization. In this paper, we have focused on optimizing the fabrication process of LNO thin films on SiO2/Si substrate and Al foil by using a solution process. The crystal structure and surface morphology were characterized by using X-ray diffraction and field-emission scanning electron microscopy (FE-SEM), respectively. It was found that the LNO thin films annealed in range of 550-700oC for 30 minutes exhibited a well-formed crystallization and a dense microstructure. According to the SEM cross-sectional observation, the thickness of LNO thin films was estimated about 80 nm. Also, from the four-probe measurement method, the electrical resistivity of LNO thin film annealed at 600oC had a minimum value of 0.42 × 10-2 Ωcm, which was possibly comparable to conventional conductive oxides. As a result, the capacitor using Pb1.2(Zr0.4Ti0.6)O3 ferroelectric layer annealed at 600oC and LNO bottom electrode provided an interesting ferroelectricity, which included a remnant polarization of 21 µC/cm2 and a saturated polarization of 35 µC/cm2. Moreover, the leakage current density was lower than 2 × 10-5 A/cm2.

Item Type:	Article
Subjects:	Engineering Physics
Divisions:	Faculty of Engineering Physics and Nanotechnology (FEPN)
Depositing User:	Dr. Bui Nguyen Quoc Trinh
Date Deposited:	14 Jun 2018 07:58
Last Modified:	14 Jun 2018 07:58
URI:	http://eprints.uet.vnu.edu.vn/eprints/id/eprint/2999

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