计算了纤锌矿ZnS以及压力体系下的电子结构,分析和比较了体系的能带结构、态密度、费米能级以及应力对ZnS体系电子结构的影响.所有计算都是基于密度泛函理论(DFT)框架下的第一原理平面波超软赝势方法.结果表明:随着压力的逐渐增大,Zn-S键长缩短,相互作用增强,价带与导带分别向低能和高能方向移动,带隙Eg展宽,这从理论上解释了ZnS带边和能隙与压力的关系.
参考文献
[1] | N. Karar;F. Singh;B. R. Mehta .Structure and photoluminescence studies on ZnS:Mn nanoparticles[J].Journal of Applied Physics,2004(2):656-660. |
[2] | Regan B O et al.A low-cast high-efficiency solar cell based on dye-sensitized colloidal Ti20 films[J].Nature,1991,353:737. |
[3] | Colvin V L;Schlamp M C;Alivisatos A P .Light-emitting diodes made from cadmium selenide nanocrystals and a semiconducting polymer[J].NATURE,1994,370:354. |
[4] | Khosravi A A;Deshpande S K;Bhagwat U A et al.Green luminescence from copper doped zinc sulphide quantum particles[J].Applied Physics Letters,1995,67(18):2702. |
[5] | Segall MD.;Lindan PJD.;Probert MJ.;Pickard CJ.;Hasnip PJ.;Clark SJ. Payne MC. .First-principles simulation: ideas, illustrations and the CASTEP code[J].Journal of Physics. Condensed Matter,2002(11):2717-2744. |
[6] | Yang N X;Ching W Y .Electronic optical and structural properties of some wurtzite crystals[J].Physical Review B:Condensed Matter,1993,48(07):4335. |
[7] | Schroer P;Kruger P;Pollmann .First-principles calculations of the electronic structure of the wurtzite semiconductors ZnO and ZnS[J].Physical Review B:Condensed Matter,1993,47:6971. |
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