Ultraviolet light-emitting devices incorporating graded layers and compositional offsets

US10700237B2 · kind B2 · utility

Assignee

• CRYSTAL IS, INC. · US

Inventors

• Craig Moe · Penfield, US
• James R. Grandusky · Pleasantdale, US
• Shawn R. Gibb · Huntersville, US
• Leo J. Schowalter · Latham, US
• Kosuke Sato · Anan, JP
• Tomohiro Morishita · Tokyo, JP

Key dates

• Filing date: Jan 4, 2019
• Grant date: Jun 30, 2020
• Expiry date: Jan 4, 2039

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/835

Abstract

In various embodiments, light-emitting devices incorporate graded layers with compositional offsets at one or both end points of the graded layer to promote formation of two-dimensional carrier gases and polarization doping, thereby enhancing device performance.