Light-emitting element
The light-emitting element design with a recessed reflective film and layered semiconductor structure addresses absorption issues, improving light extraction efficiency and brightness uniformity while reducing forward voltage.
JP2026100978APending Publication Date: 2026-06-22NICHIA CORP
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- NICHIA CORP
- Filing Date
- 2024-12-10
- Publication Date
- 2026-06-22
AI Technical Summary
Technical Problem
Existing light-emitting devices suffer from reduced light extraction efficiency due to absorption of emitted light by the n-side semiconductor layer.
Method used
A light-emitting element design featuring a semiconductor structure with a recess and an insulating reflective film, where the n-side semiconductor layer is divided into layers with different bandgap energies, and a reflective region positioned within the recess to reduce light absorption.
Benefits of technology
Improves light extraction efficiency by minimizing absorption of emitted light, enhancing brightness uniformity, and reducing forward voltage.
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Smart Images
Figure 2026100978000001_ABST
Abstract
To provide a light-emitting element that can improve light extraction efficiency. [Solution] The light-emitting element comprises a p-side electrode, a semiconductor structure, an n-side electrode, and an insulating reflective film. The semiconductor structure has a p-side semiconductor layer, an active layer, and an n-side semiconductor layer. The semiconductor structure has a recess that opens to the lower side of the p-side semiconductor layer and penetrates the p-side semiconductor layer and the active layer. The insulating reflective film is located below the semiconductor structure. The insulating reflective film has a first reflective region and a second reflective region. The first reflective region is located below the p-side semiconductor layer. The second reflective region is continuous with the first reflective region and is located within the recess. The second reflective region is located in a position that overlaps with the second layer in the vertical direction. The upper surface of the second reflective region is located below the upper surface of the first layer.
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