Short Wavelength UV LEDs Based on Bulk Nitride Substrates

基于块状氮化物基板的短波长 UV LED

• 批准号: 7054834
• 负责人: LEO J SCHOWALTER
• 金额: $ 10万
• 依托单位: CRYSTAL IS, INC.
• 依托单位国家: 美国
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-20 至 2006-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7054834
• 关键词: aluminum; bioengineering /biomedical engineering; biomedical equipment development; gallium; light emission; light intensity; lighting; nitrogen compounds; semiconduction; ultraviolet radiation

DESCRIPTION (provided by applicant): Modern biomedical instrumentation relies on ultraviolet (UV) light sources to implement a broad range of detection techniques. The long-term goal of the proposed effort is the development of solid-state UV light emitting diodes (UV LEDs) as a replacement for existing lamp sources at wavelengths shorter than 360 nm, where commercial solid-state devices do not exist. The proposed approach is based on the fabrication of UV LEDs in the aluminum gallium nitride (AIGaN) material system on a recently-developed bulk single-crystal aluminum nitride (AIM) substrate. The unique properties of this AIM substrate, including its close lattice- match to AIGaN alloys and its exceedingly low defect density, enable the manufacture of LEDs with shorter wavelength, higher efficiency, higher brightness, and longer lifetime than those fabricated on alternative substrate materials. The Phase I program is to design and demonstrate a UV LED with emission at 340 nm. A novel epitaxial structure in the AIGaN system will be designed, modeled, grown and characterized. Then devices will be fabricated and tested. At the 340 nm wavelength and shorter, such UV LEDs will offer improved efficiency, compactness, reliability, and cost relative to existing lamps, enhancing the performance and utility of biomedical research tools and perhaps fostering a new generation of compact microfluidic instruments. Ultimately, this will enable a greater understanding of the biological mechanisms that underlie human health, the discovery of new therapies and diagnostics, and more precise control of pharmaceutical manufacturing processes and drug quality.

描述（由申请人提供）：现代生物医学仪器依赖于紫外（UV）光源来实现广泛的检测技术。拟议努力的长期目标是开发固态UV发光二极管（UV LED），以替代波长短于360 nm的现有光源，其中不存在商用固态器件。所提出的方法是基于最近开发的块状单晶氮化铝（AIM）衬底上的氮化铝镓（AlGaN）材料系统中的UV LED的制造。该AIM衬底的独特性质，包括其与AlGaN合金的紧密晶格匹配和其极低的缺陷密度，使得能够制造具有比在替代衬底材料上制造的那些更短波长、更高效率、更高亮度和更长寿命的LED。第一阶段的计划是设计和展示一个紫外线发光二极管与发射在340 nm。在AlGaN系统中的一种新型外延结构将被设计，建模，生长和表征。然后将制造和测试设备。在340 nm波长和更短的波长下，这种UV LED相对于现有灯将提供更高的效率，紧凑性，可靠性和成本，提高生物医学研究工具的性能和实用性，并可能促进新一代紧凑型微流体仪器。最终，这将有助于更好地了解人类健康的生物学机制，发现新的疗法和诊断方法，以及更精确地控制制药过程和药物质量。