Mn掺杂的ZnO基稀磁半导体材料由于具有独特的特性而受到人们广泛的关注.ZnO的激子束缚能高达60 meV,具有优良的光学性质.因此,Mn掺杂的ZnO材料研究在磁性半导体领域广泛开展起来.文章采用溶胶-凝胶法制备了Mn掺杂的ZnO纳米晶,讨论了不同Mn含量对材料结构和光致发光的影响.XRD结果表明,所有的样品均具有六角纤锌矿结构,并且随着引入Mn含量的增加,样品的晶格常数增大.光致发光结果显示,随Mn含量的增加,样品的紫外发光峰先红移后蓝移.光致发光谱也显示,适量的Mn掺杂可以钝化样品的可见区发射,提高样品的光学质量.
参考文献
[1] | 刘宜华,张连生.稀释磁性半导体[J].物理学进展,1994,14(1):82-119. |
[2] | Dietl T,Ohno H,Matsukura F,et al.Zener model description of ferromagnetism in zinc-blende[J].Magnetic Semiconductors,2000,287(5455):1019-1022. |
[3] | 徐自强,邓宏,谢娟,等.掺Al对ZnO薄膜结构和光电性能的影响[J].液晶与显示,2005,20(6):503-507. |
[4] | Saeki H,Tabata H,Kawai T.Magnetic and electric properties of vanadium doped ZnO films[J].Solid State Commun.,2001,120(11):439-443. |
[5] | Viswanatha R,Sapra S,Gupta S S,et al.Synthesis and characterization of Mn-doped ZnO nanocrystals[J].J.Phys.Chem.B,2004,108(20):6303-6310. |
[6] | Zhou H J,Hofmann D M,Hofstaetter A,et al.Magnetic resonance investigation of Mn2+ in ZnO nanocrystals[J].J.Appl.Phys.,2003,94(3):1965-1968. |
[7] | Bagnall D M,Chen Y F,Zhu Z,et al.Room temperature excitonic stimulated emission from zinc oxide epilayers grown by plasma-assisted MBE[J].J.Crystal.Growth,1998,184/185:605-609. |
[8] | Mo M S,Shao M W,Hu H M,et al.Growth of single-crystal PbS nanorods via a biphasic solvothermal interface reaction route[J].J.Cryst.Growth,2002,244(3):364-368. |
[9] | Liang J B,Liu J W,Xie Q,et al.Hydrothermal growth and optical properties of doughnut-shaped ZnO microparticles[J].J.Phys.Chem.B,2005,109(19):9463-9467. |
[10] | Levy L,Hochepied J F,Pileni M P.Control of the size and composition of three dimensionally diluted magnetic semiconductor clusters[J].J.Phys.Chem.,1996,100 (47):18322-18326. |
[11] | Bylsma R B,Becker W M,Kossut J.Dependence of energy gap on x and T in Zn1-xMnx Se:The role of exchange interaction[J].Phys.Rev.B,1986,33(12-15):8207-8215. |
[12] | Liu M,Kitai A H,Mascher P.Point defects and luminescence centres in zinc oxide and zinc oxide doped with manganese[J].J.Lumin.,1992,54(1):35-42. |
[13] | Zhang X T,Liu Y C,Zhang J Y,et al.Structure and photoluminescence of Mn-passivated nanocrystalline ZnO thin film[J].J.Cryst.Growth,2003,254(1-2):80-85. |
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