【摘要】 采用水热法制备了花生状ZnO微米棒,通过XRD,EDX和FE-SEM等技术分析了其物相组成、形貌及尺寸;通过变温荧光光谱测试及对所得谱图的高斯拟合研究了该ZnO微米棒的荧光性能,并将其在300K时所得的谱图与常规室温荧光谱图进行了比较.XRD,EDX及FE-SEM测试结果表明,该产物为长约10μm,直径约2μm的花生状六方纤锌矿ZnO微米棒;荧光测试结果表明,该ZnO微米棒有紫外峰、紫峰和绿峰3个发光峰,当温度从8K升至300K时,各峰的强度均有所减弱,同时紫外峰出现蓝移,绿峰出现红移,紫峰峰位出现特殊的"S"形(红移-蓝移-红移)移动.并对各峰的产生及随温度变化的规律进行了探讨.更多还原

【Abstract】 A unique ZnO nanostructures were synthesized with hydrothermal method. The composition, morphology and size of the sample was determined with XRD, EDX and FE-SEM. Photoluminescence(PL) properties were studied by room-temperature PL spectra, temperature-dependent shifts and its Gaussian-fitted spectra. The results of XRD, EDX and FE-SEM analysis show that the products are the hexagonal wurtzite ZnO nanostructures, with a length of ~10 μm and diameter of ~2 μm; UV, violet and green peaks, which exhibit blue-, S-shaped (red-blue-red) and redshift, respectively, and the decrease of intensity, with the temperature increasing from 8 K to 300 K, are observed in the PL spectra. The original and different temperature dependence of the UV, violet and green peaks is discussed.更多还原