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- W2067091294 abstract "Abstract We have studied up-conversion in TiO 2 thin films doped with Er 3 + deposited using radio frequency-magnetron sputtering. The TiO 2 host was optimized to achieve efficient up-conversion signal from Er 3 + . We controlled the TiO 2 microstructure by varying the substrate temperature and radio frequency target power during deposition, and by changing the Er 3 + doping concentration. Photoluminescence was used to investigate the influence of the microstructure of TiO 2 on the up-conversion efficiency. This was attained by exciting the thin films with 1550 nm light from a CW laser, and studying the emission at a wavelength of 980 nm, corresponding to the transition from 4 I 11/2 to 4 I 15/2 in Er 3 + . Our results demonstrate that strong up-conversion luminescence is obtained when the TiO 2 :Er 3 + thin film is deposited at low radio frequency powers, high substrate temperature (≥ 255 °C) and with Er 3 + doping above 4.5 at.%. The TiO 2 host matrix was found to yield stronger up-conversion luminescence when amorphous than when polycrystalline." @default.
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- W2067091294 date "2014-01-01" @default.
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- W2067091294 title "Optimization of Er3+-doped TiO2-thin films for infrared light up-conversion" @default.
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- W2067091294 doi "https://doi.org/10.1016/j.tsf.2013.10.123" @default.
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