以Zn(NO_3)_2、(NH_4)_2CO_3与Y(NO_3)_3为初始原料,采用水热法制备了棒状和枝状ZnO及掺杂Y的ZnO纳米晶.采用XRD、Raman、FESEM 、EDAX和PL方法对合成产物形貌与发光性能进行表征.XRD与Raman的研究结果表明,合成的棒状和枝状ZnO纳米晶为六方纤锌矿单晶;XRD与FESEM的测试结果表明,pH值对水热产物的晶相及形貌有重要的影响;XRD结合EDAX的分析结果表明,热处理后的水热产物中Y元素掺入了ZnO基体;ZnO及ZnO-Y_2O_3的纳米晶PL谱的结果表明,产物的发光性能与制备方式有关,与此同时,ZnO-Y_2O_3纳米晶的本征发光峰发生红移,其结果与Y元素与ZnO之间的能量传递有关.
Rod and branch like ZnO and flake like Y-doped ZnO nano-crystals were fabricated via a hydrothermal method using Zn(NO_3)_2, (NH_4)_2CO_3 and Y(NO_3)_3 as starting materials. X-ray diffraction, Raman, field electron scanning electronic microscropy and photoluminescence were used to characterize the products. The results of XRD and Raman reveal that the synthesized nano structured ZnO is single crystal with wurtzite structure. The results of FESEM and XRD indicate that pH values has significant effect on the morphology and crystal phases. The incorporation of Y element is proved by the results of XRD combination with EDAX. The results of photoluminescence reveal that the optical property of ZnO is related with the method of fabrication. The incorporation of Y has remarkable effect on the luminescence property of doped ZnO nanocrystal and the peak centered around 387 nm shifted to 399 nm. The result is perhaps caused by the energy transfer between Y and the matrix of ZnO.
参考文献
| [1] | Duan X et al.[J].Nature,2003,421:241. |
| [2] | Fuhrer M S et al.[J].Science,2000,288:494. |
| [3] | Dai Y.;Zhang Y.;Li QK.;Nan CW. .Synthesis and optical properties of tetrapod-like zinc oxide nanorods[J].Chemical Physics Letters,2002(1/2):83-86. |
| [4] | Yan Y et al.[J].Journal of Physical Chemistry B,2003,107:9701. |
| [5] | Xing Y J et al.[J].Applied Physics Letters,2003,83:1689. |
| [6] | Raman scattering in ZnO thin films doped with Fe, Sb, Al, Ga, and Li[J].Applied physics letters,2003(10):1974-1976. |
| [7] | Lin J et al.[J].Journal of Catalysis,1999,183:368. |
| [8] | Lin B et al.[J].Applied Physics Letters,2001,79:943. |
| [9] | Vanheusden K et al.[J].Applied Physics Letters,1996,68:403. |
| [10] | Ryu Y R et al.[J].Applied Physics Letters,2003,83:87. |
| [11] | Wenas W et al.[J].Journal of Applied Physics,1991,70:7119. |
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