Open Access Nano Express

Investigation of the properties of nanostructured Li-doped NiO films using the modified spray pyrolysis method

Wu Chia-Ching1 and Yang Cheng-Fu2*

Author Affiliations

1 Department of Electronic Engineering, Kao Yuan University, Kaohsiung, 82151, Taiwan

2 Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung, 81148, Taiwan

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Nanoscale Research Letters 2013, 8:33  doi:10.1186/1556-276X-8-33

Published: 18 January 2013


The lithium-doped nickel oxide (L-NiO) films were synthetized using the modified spray pyrolysis method with a two-step grown process. By observing the spectra of X-ray photoemission spectroscopy of L-NiO films, the intensity of Ni 2p3/2 peak of Ni3+ bonding state increases with increasing Li concentration that causes the decrease of transparency and resistivity. The L-NiO films with optimum characteristics were obtained at Li = 8 at%, where a p-type resistivity of 4.1 × 10−1 Ω cm and optical transparency above 76% in the visible region are achieved.

Modified spray pyrolysis method; Nickel oxide; Lithium; Conductivity; Transparency