EAGER: A New Approach to Realize (ZnSe)x(GaAs)1-x Alloys for Light Emission and Other Photonics Applications

EAGER：一种实现用于发光和其他光子学应用的 (ZnSe)x(GaAs)1-x 合金的新方法

• 批准号: 1648705
• 负责人: Jerry Woodall
• 金额: $ 10万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-07-15 至 2017-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1648705&HistoricalAwards=false
• 关键词: EAGER; New; Approach; Realize; ZnSe; EAGER; New; Approach; Realize; ZnSe

Title: EAGER: A Single Materials System that Could Finally Realize Light Emitting Devices with Optimal ChromaticityAbstractNontechnical Description:In spite of the tremendous progress made in the last 55 years in developing visible Light Emitting Diodes (LEDs) for applications that require red, green, and blue emitters, at least two different materials systems are still required to realize systems having only the approximate hue and colorfulness properties (chromaticity) that is required. This is a major problem because having to use two different materials technologies adds a large cost to the production of displays that have red, green, and blue elements (pixels), such as scoreboards at public arenas. Furthermore, the current technology does not produce optimal chromaticity in the display systems. Neither of these systems can efficiently produce the required "true" green color. Thus, the combination of high cost and non-optimal chromaticity has prevented the use of pixelated displays for color images for TV systems; modern TV systems use inexpensive white emitting LEDs as the light source to visualize the liquid crystal pixelated TV image. Therefore, it is the goal of this research to perform both fundamental materials science and construct exploratory devices that will realize a unified technology to reduce the manufacturing production costs and improve chromaticity for visible display applications. The broader implications of a successful outcome of this project are threefold. First, it will increase the breadth of the application markets for visible displays, especially advanced pixelated display systems, including TV systems. Second, it will add to the fundamental materials science and device engineering knowledge of a relatively unexplored materials system. Finally, low cost LEDs with optimal chromaticity will enable "tuned" white light sources without the current need to coat blue-emitting LEDs with phosphors and filtering.Technical Description:The goal of this proposal is to develop a lattice-matched, heterovalent compound semiconductor materials system and epitaxy technology to realize efficient and integrated LEDs that will cover the entire spectrum from near IR to blue wavelengths, especially "true green" (555 nm wavelength). The targeted materials system and epi-technology is (ZnSe)x(GaAs)1-x epilayers on ZnSe or GaAs substrates and Molecular Beam Epitaxy (MBE), respectively, and employs a novel method to develop homogeneous epilayers. The specific aims of this research are to 1) develop a recipe for the growth of ZnSe on GaAs based on the configuration of our MBE system, 2) identify the optimal epitaxial growth procedure of quaternary alloys of (ZnSe)x(GaAs)1-x, and 3) fabricate Double-Heterojunction (DH) devices with (ZnSe)x(GaAs)1-x composition tuned for "true green" LEDs. With the knowledge gained in this research, a single commercial materials system and a unified fabrication technology that can produce a wide spectral range of light emitting devices, laser, and solar concentrator chips can be realized. Equally important, the results are expected to have a positive translational impact because it is probable that success in unifying light emitters using a (ZnSe)x(GaAs)1-x system would have a huge impact on the photonics community both in industry and academia, especially those who would produce multi-colored pixel arrays. This in turn will open up new avenues for the community to explore both new heterovalent epitaxy principles and new applications that take advantage of integration of lattice-matched heterovalent direct band gap materials systems.

标题：急切：一种单一的材料系统，最终可以通过最佳的色彩攻击设备来实现发光设备的描述：尽管过去55年来，在开发可见光二极管（LED）的应用中取得了巨大进展，对于需要红色，绿色和蓝色发射器的应用，至少需要两个不同的材料系统，至少需要实现近似属性的属性（需要）属性（均需要两种不同的属性）。这是一个主要问题，因为必须使用两种不同的材料技术为具有红色，绿色和蓝色元素（像素）的显示器的生产增加了很大的成本，例如在公共场所的计分板。此外，当前的技术不会在显示系统中产生最佳的色彩。这些系统都无法有效地产生所需的“真”绿色。因此，高成本和非最佳色彩性的组合阻止了用于电视系统颜色图像的像素化显示器；现代电视系统使用廉价的白色发射LED作为光源来可视化液晶像素化电视图像。因此，这项研究的目标是同时执行基本材料科学和构建探索性设备，这些设备将实现统一的技术来降低制造生产成本并改善可见显示应用程序的色彩。该项目成功结果的更广泛含义是三倍。首先，它将增加可见显示器的应用市场的广度，尤其是高级像素化的显示系统，包括电视系统。其次，它将增加对相对未开发的材料系统的基本材料科学和设备工程知识。最后，具有最佳色彩性的低成本LED将使“调谐”白光来源无需目前的蓝色发射LED和磷光剂和过滤效果。技术描述：该建议的目的是开发一种晶格匹配的，异质的，异质化的复合半导体材料系统，以实现高效的LED，尤其要覆盖整个Specters of Spectrum of Spectrum'spepter'' （555 nm波长）。靶向材料系统和外科技术分别是ZNSE或GAAS底物上的1-X表层（ZNSE）X（GAAS）1-X表层，分别是分子束外延（MBE），并采用了一种新的方法来发展均质表层。这项研究的具体目的是1）根据我们的MBE系统的配置开发ZnSe在GAA上生长的食谱，2）确定（ZnSE）X（GAAS）1-X和3）的最佳外在的外部增长程序（ZNSE）X（GAAS）1-X和3）与（Znse）x NURENE（Znse）x（Znse）x（Znse）x（Zn）x（Znse）1- x（xn）1- x x（xne）1- x x（xn）1- x x-随着这项研究中获得的知识，可以实现单个商业材料系统和统一的制造技术，该技术可以生产出广泛的发光设备，激光和太阳能集中器芯片。同样重要的是，预计结果将产生积极的翻译影响，因为使用（ZNSE）X（GAAS）1-X系统在统一光发射器方面的成功很可能会对工业和学术界的光子学界产生巨大影响，尤其是那些会产生多色像素阵列的人。反过来，这将为社区开辟新的途径，以探索新的异性外观原则和新应用，以利用晶格匹配的异质型直接带隙材料系统的整合。