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- W2094062512 abstract "ZnO nanoparticles (NPs) have attracted increasing attention recently because it is nontoxic, chemically stable towards air, and inexpensive luminescent material instead of the GaN- based structures. However, in general, two emission peaks appear in the ultraviolet and visible region in the photoluminescence spectra of ZnO NPs because of trapping with surface states or a lattice defect. Therefore, in this study, we tried to control the defect of ZnO NPs to obtain pure band-edge emission peak, as well as to keep the dispersivity as colloidal solution. At first, we applied high temperature (300°C) to synthesize ZnO NPs, however, short reaction time (<30s) was not enough for obtaining pure-band-edge emission ZnO NPs, whereas long time (>120s) reaction made ZnO NPs to lose its colloidal stability and aggregated to decrease their PL intensity significantly. So, low synthesis temperature (200°C) was hardly obtaining emission peak even after 1h of heating. Therefore, it was tried to divide synthesis into two steps to generate ZnO NPs at high temperature (300°C) and to heal the defect with the dispersing quality keeping at low temperature (200°C). As a result, we succeed to suppress the defects of ZnO NPs and obtain the well-dispersed pure band-edge emission ZnO NPs." @default.
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- W2094062512 date "2011-09-21" @default.
- W2094062512 modified "2023-09-27" @default.
- W2094062512 title "The preparation and property control of Zinc Oxide NPs" @default.
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- W2094062512 doi "https://doi.org/10.1088/1757-899x/18/8/082026" @default.
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