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- W1978446003 abstract "In this paper, photoluminescence (PL) of ZnO thin films prepared on c-Al 2 O 3 substrates by the pulsed laser deposition (PLD) method at different O 2 partial pressures is investigated. For all samples, a narrow ultraviolet (UV) emission and a broad visible emission can be observed at room-temperature (RT). With increasing O 2 partial pressures from 0.2 to 5 Pa, the intensity ratio of the UV to visible emissions increases, and the energy positions of the UV emission band shift to the high energy side. It is noted that the visible part includes two emission bands of green luminescence (GL) and yellow luminescence (YL), in which the GL emission is strong at low oxygen pressure and the YL emission becomes dominant at high O 2 partial pressures. The temperature-dependent PL spectra show that the UV emission is composed of two bands labeled FX and FA. The dependences and possible assignments of these PL bands are briefly discussed. • We confirmed that the RT UV emission band is due to two transitions of the FX and FA. • The intensity of the FX and FA emission bands strongly depends on oxygen partial pressures. • We deduced that the acceptor-like defects located in the grain boundaries are responsible for the FA emission. • The visible emission includes the GL related to V O and the YL related to V Zn or O i . • The GL emission strongly affects the UV emission." @default.
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- W1978446003 date "2014-08-01" @default.
- W1978446003 modified "2023-09-22" @default.
- W1978446003 title "The effect of O2 partial pressure on the photoluminescence of ZnO thin films grown by pulsed laser deposition" @default.
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- W1978446003 doi "https://doi.org/10.1016/j.jlumin.2013.10.023" @default.
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