Light-Emitting Element Structure for Directional Light Extraction
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Solution Overview
Problem
Existing light emitting elements face challenges in improving light emission efficiency.
Innovation Solution
A light emitting element design featuring a first semiconductor layer with distinct parts, including a first part, a second part with a greater width, and a third part with varying widths, along with an active layer, a second semiconductor layer, and an electrode layer, optimized for improved light guidance and emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional light emitting element structure is used, then the device is simple to manufacture, but the light emission efficiency is insufficient
Solution Approach 1:
The first semiconductor layer is divided into three distinct parts (first part, second part, and third part) with different widths, creating a segmented structure that guides light more effectively. This segmentation allows each part to serve a specific function in light management, improving emission efficiency without requiring entirely new materials or processes.
Solution Approach 2:
Different parts of the first semiconductor layer are given different local qualities through varying widths. The first part, second part, and third part have distinct dimensional characteristics that optimize light guidance in different regions, allowing the structure to handle light propagation more effectively at each location.
2Loss of energy
If light guidance is improved by adding structural features, then light emission efficiency increases, but manufacturing complexity increases
Solution Approach 1:
The segmentation of the first semiconductor layer into three parts with different widths creates effective light guidance features that reduce light loss. These segmented structures can be integrated into existing semiconductor manufacturing processes, achieving improved light management without requiring entirely new fabrication techniques.
Solution Approach 2:
The invention changes the dimensional parameters (widths) of different parts of the first semiconductor layer to optimize light guidance. By adjusting the width parameters of the first part, second part, and third part, the structure effectively guides light while remaining compatible with standard manufacturing capabilities.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enhances light emission efficiency by guiding light in the desired direction, minimizing loss, and improving the overall performance of the light emitting element.
Implementation Method 1
A side surface of the third part may have a slope at an angle with respect to the first end surface of the light emitting element... guiding light in the light emission direction
Implementation Method 2
The light emitting element may further include a reflective layer surrounding a side surface of the first semiconductor layer, a side surface of the active layer, a side surface of the second semiconductor layer, and a side surface of the electrode layer
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
A light emitting element includes a first end surface and a second end surface opposite to each other, the light emitting element includes: a first semiconductor layer disposed at the first end surface; an active layer disposed on the first semiconductor layer; a second semiconductor layer disposed on the active layer; and an electrode layer disposed on the second semiconductor layer and disposed at the second end surface. The first semiconductor layer includes a first part, a second part disposed on the first part and adjacent to the active layer, and a third part disposed between the first part and the second part. A width of the first part and a width of the second part are different from each other, and the third part has different widths at different length positions.