The carbon based boron oxynitride （BCNO） phosphor was synthesized by solid state reaction between boric acid （H3BO3） and melamine （C3H6N6） in the molar ratios of 1：1 and 2：1 respectively at different temperatu...The carbon based boron oxynitride （BCNO） phosphor was synthesized by solid state reaction between boric acid （H3BO3） and melamine （C3H6N6） in the molar ratios of 1：1 and 2：1 respectively at different temperatures up to 1400℃. The composition with molar ratios 1：1 of starting materials is found to be highly crystalline with an average particle size of 38 nm and the lattice constants a=b=0.251 nm and c=0.666 nm. The solid state reaction of boric acid and melamine in the composition 2：1 leads to the formation of compound in the semi-crystalline state under the same conditions of preparation, but its phase cannot be recognised. The X-ray diffraction （XRD） spectra, transmission electron microscopy （TEM） and scanning electron microscopy （SEM） images of BCNO compound confirm the phase, nanometre size and shape respectively of synthesized material. The photoluminescence （PL） spectra of the synthesized BCNO products reveals that the electronic structure of BCNO compound can be controlled by changing the molar ratios of starting materials and heating temperatures. These synthesized compounds are very interesting and important candidate materials for light emitter.展开更多
文摘The carbon based boron oxynitride （BCNO） phosphor was synthesized by solid state reaction between boric acid （H3BO3） and melamine （C3H6N6） in the molar ratios of 1：1 and 2：1 respectively at different temperatures up to 1400℃. The composition with molar ratios 1：1 of starting materials is found to be highly crystalline with an average particle size of 38 nm and the lattice constants a=b=0.251 nm and c=0.666 nm. The solid state reaction of boric acid and melamine in the composition 2：1 leads to the formation of compound in the semi-crystalline state under the same conditions of preparation, but its phase cannot be recognised. The X-ray diffraction （XRD） spectra, transmission electron microscopy （TEM） and scanning electron microscopy （SEM） images of BCNO compound confirm the phase, nanometre size and shape respectively of synthesized material. The photoluminescence （PL） spectra of the synthesized BCNO products reveals that the electronic structure of BCNO compound can be controlled by changing the molar ratios of starting materials and heating temperatures. These synthesized compounds are very interesting and important candidate materials for light emitter.
