Investigation of the properties of nanostructured Li-doped NiO films using the modified spray pyrolysis method
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
Nanoscale Research Letters 2013, 8:33 doi:10.1186/1556-276X-8-33Published: 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.