کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5364910 | 1388322 | 2012 | 10 صفحه PDF | دانلود رایگان |
We begin with the concept of semiconductor surface passivation by adsorption of sub-monolayer atomic coverages. We then present a theoretical analysis of structural reconstruction and passivating behaviour of semiconductor surfaces upon sub-monolayer adsorption of alkaline-earth metals (group II atoms) and chalcogens (group VI atoms). Specific results are presented from first-principles calculations for Ca adsorption on Si(0Â 0Â 1) and Si(1Â 1Â 1), and S adsorption on GaAs(0Â 0Â 1). The role of chemical species of adsorbate and surface atoms in achieving different degrees of passivation is highlighted.
⺠Ab initio theoretical studies of the electronic structure of chemisored semiconductor surfaces. ⺠Understanding of semiconductor passivation at atomic level. ⺠Detailed analysis of structural models for Ca/Si(0 0 1), Ca/Si(1 1 1), and S/GaAs(0 0 1) surfaces for sub-monolayer elemental coverages.
Journal: Applied Surface Science - Volume 258, Issue 21, 15 August 2012, Pages 8377-8386