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

9320415 Tamargo该提案用于新型三元和四元II-VI族化合物半导体和异质结构的生长和表征，其将提供实际可见光发射器设计所需的一系列独特性质。 目前，基于ZnCdSe/ZnSe异质结构的蓝绿激光器已经初步得到证实。 三元是小带隙材料或阱。 然而，这两种材料之间的非理想带偏移以及由于II-VI结构内的晶格失配和与衬底的晶格失配而导致的缺陷限制了器件的性能。如在III-V族技术中，可以将联合收割机二元II-VI族化合物组合以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节到所需的那些。 这些II-VI族混合合金很少被生长和研究。 它将通过几个合作来增强额外的材料表征。 利用这些异质结构的简单器件，具有更有前途的性能，也将进行研究。 ***

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. ***