Papers by Author: Y.Y. Wang

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Authors: T. Liu, Ying Huan Guo, Hui-Min Cao, Y.Y. Wang, R.Z. Ma
Authors: Z.W. He, Xing Qin Liu, D.Y. Xu, Qiang Su, D.F. Guo, Y.Y. Wang
Abstract: The characteristic of nanoporous SiO2 thin film prepared by sol-gel method with catalyst HF was studied by scanning electron microscopy, Fourier transform infrared, HP analyzer series and ellipsometry. Results showed the incorporation of HF effectively adjusted the pore size and distribution, and lowered the leakage current density and dielectric constant. This might be related to the weak acidity of HF, which properly controlled the velocity of chemical reaction in solution, and to the introduction of strong Si-F bonds, which had the lower electronegative and the larger volume.
Authors: D.Y. Xu, Yan Ping Liu, Z.Y. Chen, Z.W. He, Xing Qin Liu, Y.Y. Wang
Abstract: Tb-doped silicon carbide (SiC:Tb) films were deposited on porous silicon (PS) substrates by rf co-sputtering. The prepared films were annealed in N2 atmosphere at different temperature from 500-1000 °C. The effects of annealing on the structure and photoluminescence (PL) characters of the films were investigated by Atomic force microscopy (AFM), Raman, Fourier transform infrared spectroscope (FTIR) and fluorescence spectrometer. The SiOx layer at the SiC:Tb/PS interface was destroyed as the annealing temperature increasing, and the oxygen-deficiency centers (ODCs) increased. The SiOx layer was restructured at higher annealing temperature and the ODCs decreased. This is the reason of origin and changing of UV band in PL spectra. The visible band origins from Tb3+, and is stable with annealing temperature.
Authors: Hui-Min Cao, Ren Wu Zhang, Ying Huan Guo, Y.Y. Wang, Gou-Qiang Yang, Shi Kang Wu
Authors: Y.Y. Shan, C.C. Ling, H.L. Au, S. Fung, C.D. Beling, Y.Y. Wang
Authors: Y.Y. Wang
Authors: Y.Y. Wang, Z.P. Wang, Li Li Yang, Ying Huan Guo, Mao Rong Huang
Authors: Mao Rong Huang, Y.Y. Wang, Ju Hua Yang, Yong-Shu He, Ying Huan Guo, Tong-Nian Sun
Authors: R. Zhang, Y.Y. Wang
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