New Alloys and Heterostructures for II-VI Visible Semiconductor Lasers and Devices

9320415 Tamargo这个提议是为了生长和表征新的三元和四元II-VI化合物半导体和异质结构，这将为设计实用的可见光发射器提供一系列独特的性能。目前，基于ZnCdSe/ZnSe异质结构的初级蓝绿激光器已经被证实。三元材料是一种带隙小的材料。然而，这两种材料之间的非理想带偏移和II-VI结构内晶格不匹配以及与衬底的缺陷限制了器件的性能。与III-V技术一样，可以将二元II-VI化合物结合形成三元和四元合金，从而将材料的能带结构和晶格常数调整到所需的水平。这些II-VI混合合金很少生长和研究。它将通过几次合作来加强其他材料的表征。使用这些具有更有前途的性质的异质结构的简单器件也将被研究。＊＊＊

9320415 Tamargo This proposal is for the growth and characterization of novel ternary and quaternary II-VI compound semiconductors and heterostructures that will provide a range of unique properties needed for the design of practical visible light emitters. At present, rudimentary blue-green lasers based on ZnCdSe/ZnSe heterostructures have been demonstrated. The ternary is the small bandgap material or well. However, non-ideal band offsets between those two materials and defects due to lattice mismatch within the II-VI structure and with the substrate limit the performance of the device. As in III-V technology, it is possible to combine binary II-VI compounds to form ternary and quaternary alloys and thus adjust the band structure ad lattice constant of the materials to those desired. Very few of these II-VI mixed alloys have been grown and investigated. It will be enhanced through several collaborations for additional materials characterization. Simple devices using those heterostructures which posses more promising properties, will also be investigated. ***