利用溶胶-凝胶法制备了 Cu 掺杂 ZnO 纳米晶体薄膜,通过 XRD、TEM 、AFM、UV-VLS 和 VSM对其晶体结构、表面形貌、透光性、禁带宽度和磁性进行了表征和分析。结果表明,所有样品都具有 c 轴择优生长取向,Cu 掺杂没有改变 ZnO 晶体的纤锌矿结构,即没有检测到任何非晶态产物以及各种第二相的存在,表明 Cu2＋已经取代 Zn2＋融入了晶体。但是,Cu的掺杂浓度以及煅烧温度的变化,改善了薄膜的粗糙度、晶粒度、透光率、禁带宽度及室温铁磁性。在所有样品中,掺杂浓度为2％、煅烧温度为500℃的薄膜粗糙度、晶粒度最小而透光性和室温铁磁性最强。样品的能隙则是随着 Cu 掺杂浓度和煅烧温度的提高而变小。
Cu-doping ZnO nano-films were prepared by a sol-gel technique.The crystal structures,surface mor-phology,transmittance,band gap and room magnetism were characterized and analyzed by X-ray diffraction (XRD),transmission electron microscopy (TEM),atomic force microscope (AFM),ultraviolet visible spectros-copy (UV-Vis),and vibrating sample magnetometer (VSM).The results show that the films exhibit a hexa-gonal structure,showing a preferential growth along c axis.Any amorphous material or secondary phase was not inspected in all synthesized samples.It indicate that Zn2 + was substituted by Cu2 + in the crystal film.The roughness,the grain size,the transmittance,band gap and room magnetism of the films are improved by the changes of Cu consistence and sintering temperature.The sample of 2% Cu-doping sintered at 500 ℃ has the least roughness and grain sizes,and has the most transmittance and room temperature ferromagnetism.But the band gap decreases with the increase of Cu consistence and sintering temperature.
参考文献
| [1] | Norton D P;Heo Y W;Ivill M P et al.ZnO:growth,doping and processing[J].MATERIALS TODAY,2004,7(6):34-40. |
| [2] | Vogel D;Krüger P;Pollmann J .Ab initio electronic-structure calculations for Ⅱ-Ⅵ semiconductors using self-interaction-corrected pseudopotentials[J].Physical Review B:Condensed Matter,1995,52:R14316-R14319. |
| [3] | Reynolds DC.;Jogai B.;Look DC. .OPTICALLY PUMPED ULTRAVIOLET LASING FROM ZNO[J].Solid State Communications,1996(12):873-875. |
| [4] | Zu P.;Wong GKL.;Kawasaki M.;Ohtomo A.;Koinuma H.;Segawa Y.;Tang ZK. .ULTRAVIOLET SPONTANEOUS AND STIMULATED EMISSIONS FROM ZNO MICROCRYSTALLITE THIN FILMS AT ROOM TEMPERATURE[J].Solid State Communications,1997(8):459-463. |
| [5] | Robert F. Service .Will UV Lasers Beat the Blues?[J].Science,1997(5314):895-0. |
| [6] | Saha H;Basu S;Bhattacharyya P.MEMS based nano crystalline zinc oxide methane gas sensors[J].Phys-ics of Semiconductor Devices,2007:645-651. |
| [7] | 溶胶-凝胶法制备透明氧化物薄膜晶体管的研究进展[J].功能材料,2014(13):13013-13020. |
| [8] | Jin Z W;Fukumura T;Kawasaki M et al.High throughput fabrication of transition-metal-doped epitaxial ZnO thin films:a series of oxide-diluted magnetic semi-conductors and their properties[J].Applied Physics Letters,2001,78:{?}3824-(1-3. |
| [9] | Ghoshal S;Kumar PSA .Process-dependent magnetic properties of Co-doped ZnO in bulk and thin film form[J].Journal of Magnetism and Magnetic Materials,2008(12):L93-L96. |
| [10] | Liu XC;Shi EW;Chen ZZ;Chen BY;Zhang T;Song LX;Zhou KJ;Cui MQ;Yan WS;Xie Z .Effect of oxygen partial pressure on the local structure and magnetic properties of Co-doped ZnO films[J].Journal of Physics. Condensed Matter,2008(2):25208-1-25208-5-0. |
| [11] | Sihem Lakehal A;Slaymane Achour;Claudio Ferrari et al.Filipo fabrri photoelectrochemical properties of ZnO nanorods decorated with Cu and Cu2 O nanoparti-cles[J].Superlattices and Microstructures,2014,72:253-261. |
| [12] | Kittilstved KR;Norberg NS;Gamelin DR .Chemical manipulation of High-T-C ferromagnetism in ZnO diluted magnetic semiconductors[J].Physical review letters,2005(14):7209-1-7209-4-0. |
| [13] | Walsh A;Silva J L F D;Wei S H .Theoretical descrip-tion of carrier mediatedmagnetism in cobalt doped ZnO[J].Physical Review Letters,2008,100:256401. |
| [14] | Jin-Hong Lee;Kyung-Hee Ko;Byung-Ok Park .Electrical and optical properties of ZnO transparent conducting films by the sol-gel method[J].Journal of Crystal Growth,2003(1/2):119-125. |
| [15] | Aksoy S;Caglar Y;llican S et al.Sol-gel derived Li,Mg co-doped ZnO film:reparation and characterization via XRD,XPS,FESEM[J].Journal of Alloys and Compounds,2012,5 12:171-178. |
| [16] | Okorn Mekasuwandumrong;Pongsapak Pawinrat;Piyasan Praserthdam .Effects of synthesis conditions and annealing post-treatment on the photocatalytic activities of ZnO nanoparticles in the degradation of methylene blue dye[J].Chemical engineering journal,2010(1):77-84. |
| [17] | Z.X. Zhang;X.J. Pan;T. Wang .Electrical properties of nanocrystalline GaN film prepared by magnetron sputtering[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):61-64. |
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