Synthesis and Optical Properties of II-O-VI Highly Mismatched Alloys.

Yu, K. M. ; Walukiewicz, W. ; Scarpulla, M. A. ; Dubon, O. D. ; Becla, P.

Technical Information Center Oak Ridge Tennessee

关键词: Oxides;    Synthesis;    Optical properties;    Alloys;    Thin films;   

RP-ID  :  DE2005836378

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We have synthesized ternary and quaternary diluted II-VI oxides using the combination of O ion implantation and pulsed laser melting. CdOxTe1-x thin films with x up to 0.015, and the energy gap reduced by 150 meV were formed by O+-implantation in CdTe followed by pulsed laser melting. Quaternary Cd0.6Mn0.4OxTe1-x and Zn0.88Mn0.12OxTe1-x with mole fraction of incorporated O as high as 0.03 were also formed. The enhanced O incorporation in Mn-containing alloys is believed to be due to the formation of relatively strong Mn-O bonds. Optical transitions associated with the lower (E-) and upper (E+) conduction subbands resulting from the anticrossing interaction between the localized O states and the extended conduction states of the host are clearly observed in these quaternary diluted II-VI oxides. These alloys fulfill the criteria for a multiband semiconductor that has been proposed as a material for making high efficiency, singlejunction solar cells.