Ce掺杂ZnO螺丝刀状纳米材料的制备及其光学特性研究
|
摘要
采用溶胶-凝胶和化学气相沉积相结合的方法,制备一种Ce掺杂ZnO纳米材料,对其结构、形貌、能带结构和发光特性等进行分析,结果表明:该纳米材料形状类似螺丝刀,由六方微米基底和纳米棒顶两部分组成,具有很好的单晶结构;其制备过程符合VLS生长机制,且Zn和Ce蒸气浓度对各个晶面的生长速度有非常大的影响;与纯ZnO纳米材料相比,该纳米材料中的Zn 2p_(3/2)峰向低能级转移,而O1s峰向高能级转移,Ce的掺杂影响了ZnO的电子结构和带隙结构;其紫外发射峰强度降低并伴有红移,且绿光发射强度得到提高.该方法制备的纳米材料,在组装纳米器件方面有很好的应用前景.
A Ce-doped ZnO nanomaterial was prepared by a simple method of sol-gel and chemical vapor deposition. The structure,morphology,band structure and luminescence properties of the ZnO nanomaterials were analyzed. The results showed that the nanomaterial was similar to a screwdriver,and consisted of a hexagonal micron substrate and a nanorod top. It had a good single crystal structure; its preparation process conformed to the VLS growth mechanism,and the vapor concentrations of Zn and Ce had a very large influence on the growth rate of each crystal face; Compared with ZnO nanomaterials,the Zn 2p_(3/2) peak in the nanomaterials shifted to a lower energy level,while the O1 s peak shifted to a higher energy level. The doping of Ce affected the electronic structure and band gap structure of ZnO; its UV emission peak was reduced and accompanied by red shift,and the intensity of green light emission was improved. The nanomaterial prepared has a good application prospect in assembling nanodevices.
A Ce-doped ZnO nanomaterial was prepared by a simple method of sol-gel and chemical vapor deposition. The structure,morphology,band structure and luminescence properties of the ZnO nanomaterials were analyzed. The results showed that the nanomaterial was similar to a screwdriver,and consisted of a hexagonal micron substrate and a nanorod top. It had a good single crystal structure; its preparation process conformed to the VLS growth mechanism,and the vapor concentrations of Zn and Ce had a very large influence on the growth rate of each crystal face; Compared with ZnO nanomaterials,the Zn 2p_(3/2) peak in the nanomaterials shifted to a lower energy level,while the O1 s peak shifted to a higher energy level. The doping of Ce affected the electronic structure and band gap structure of ZnO; its UV emission peak was reduced and accompanied by red shift,and the intensity of green light emission was improved. The nanomaterial prepared has a good application prospect in assembling nanodevices.
引文
[1]BARTH S,HERNANDEZ-RAMIREZ F,HOLMESJ D,et al.Synthesis and applications of onedimensional semiconductors[J].Progress in Materials Science,2010,55(6):563.
[2]TIAN Z R,VOIGT J A,LIU J,et al.Complex and oriented Zn O nanostructures[J].Nature Materials,2003,2(12):821.
[3]LI L,ZHAI T Y,BANDO Y,et al.Recent progress of one-dimensional ZnO nanostructured solar cells[J].Nano Energy,2012,1(1):91.
[4]ZHOU Y,LI M Y,WANG Y T,et al.Synthesis of sea urchin-like ZnO by a simple soft template method and its photoelectric properties[J].Materials Science in Semiconductor Processing,2014,27:1050.
[5]XU S,WANG Z L.One-dimensional Zn O nanostructures:solution growth and functional properties[J].Nano Research,2011,4(11):1013.
[6]WANG Z L,SONG J H.Piezoelectric nanogenerators based on zinc oxide nanowire arrays[J].Science,2006,312(5771):242.
[7]HU Y F,CHANG Y L,FEI P,et al.Designing the electric transport characteristics of ZnOmicro/nanowire devices by coupling piezoelectric and photoexcitation effects[J].ACS Nano,2010,4(2):1234.
[8]ZHANG F,CUI H,ZHANG W.Identifying properties of Co-doped ZnO nanowires from firstprinciples calculations[J].Vacuum,2015,119:131.
[9]SA AEDI A,YOUSEFI R,JAMALI-SHEINI F,et al.Optical properties of group-I-doped Zn Onanowires[J].Ceramics International,2014,40(3):4327.
[10]ZHONG M,LI Y,HU Y,et al.Enhancement of zinc vacancies in room-temperature ferromagnetic Cr-Mn codoped ZnO nanorods synthesized by hydrothermal method under high pulsed magnetic field[J].Journal of Alloys and Compounds,2015,647:823.
[11]ZHANG B,ZHANG X T,GONG H C,et al.Ni-doped zinc oxide nanocombs and phonon spectra properties[J].Physics Letters A,2008,372(13):2300.
[12]GONG H C,ZHONG J F,ZHOU S M,et al.Ce-induced single-crystalline hierarchical zinc oxide nanobrushes[J].Superlattices and Microstructures,2008,44(2):183.
[2]TIAN Z R,VOIGT J A,LIU J,et al.Complex and oriented Zn O nanostructures[J].Nature Materials,2003,2(12):821.
[3]LI L,ZHAI T Y,BANDO Y,et al.Recent progress of one-dimensional ZnO nanostructured solar cells[J].Nano Energy,2012,1(1):91.
[4]ZHOU Y,LI M Y,WANG Y T,et al.Synthesis of sea urchin-like ZnO by a simple soft template method and its photoelectric properties[J].Materials Science in Semiconductor Processing,2014,27:1050.
[5]XU S,WANG Z L.One-dimensional Zn O nanostructures:solution growth and functional properties[J].Nano Research,2011,4(11):1013.
[6]WANG Z L,SONG J H.Piezoelectric nanogenerators based on zinc oxide nanowire arrays[J].Science,2006,312(5771):242.
[7]HU Y F,CHANG Y L,FEI P,et al.Designing the electric transport characteristics of ZnOmicro/nanowire devices by coupling piezoelectric and photoexcitation effects[J].ACS Nano,2010,4(2):1234.
[8]ZHANG F,CUI H,ZHANG W.Identifying properties of Co-doped ZnO nanowires from firstprinciples calculations[J].Vacuum,2015,119:131.
[9]SA AEDI A,YOUSEFI R,JAMALI-SHEINI F,et al.Optical properties of group-I-doped Zn Onanowires[J].Ceramics International,2014,40(3):4327.
[10]ZHONG M,LI Y,HU Y,et al.Enhancement of zinc vacancies in room-temperature ferromagnetic Cr-Mn codoped ZnO nanorods synthesized by hydrothermal method under high pulsed magnetic field[J].Journal of Alloys and Compounds,2015,647:823.
[11]ZHANG B,ZHANG X T,GONG H C,et al.Ni-doped zinc oxide nanocombs and phonon spectra properties[J].Physics Letters A,2008,372(13):2300.
[12]GONG H C,ZHONG J F,ZHOU S M,et al.Ce-induced single-crystalline hierarchical zinc oxide nanobrushes[J].Superlattices and Microstructures,2008,44(2):183.