LED Protective Layer Passivates Semiconductor Core Defects
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light emitting diodes face challenges with surface defects, such as vacancies, which reduce the life, efficiency, and crystallizability of the semiconductor core, leading to suboptimal performance in high-temperature environments and manufacturing processes.
Innovation Solution
A light emitting element is designed with a protective layer comprising specific atoms (Group 3 and Group 5 elements) that form chemical bonds at lattice points on the semiconductor core, minimizing surface defects and enhancing the element's life and efficiency by reducing vacancy concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional inorganic light emitting diode is used, then high efficiency of blue light and durability in high temperature environment are achieved, but surface defects such as vacancies occur on the semiconductor core which reduce element life and efficiency
Solution Approach 1:
A protective layer comprising Group 3 elements (e.g., Ga, In) and Group 5 elements (e.g., N, P, As) is introduced as an intermediary between the semiconductor core and the external environment. This protective layer fills and passivates surface vacancies and defects on the semiconductor core, preventing harmful factors from affecting the core while maintaining the high efficiency and durability characteristics of the inorganic LED material.
Solution Approach 2:
The invention creates a composite structure by combining the semiconductor core (typically III-V compound semiconductors like GaN) with a protective layer formed from Group 3 and Group 5 elements. This composite material approach allows the core to maintain its optoelectronic performance while the protective layer provides surface defect mitigation, effectively combining the advantages of different material systems to resolve the contradiction between maintaining high efficiency and reducing surface defects.
2Manufacturing precision
If the semiconductor core is exposed without protection, then manufacturing process simplicity is maintained, but crystallizability and element performance are reduced due to surface vacancies
Solution Approach 1:
The protective layer is formed as a preliminary action during the manufacturing process, before the semiconductor core is fully operational or before it is subjected to high-temperature processing. By pre-establishing this protective barrier, surface vacancies are passivated early in the manufacturing sequence, ensuring proper crystallization and preventing defect formation that would otherwise occur during subsequent processing steps or device operation.
Solution Approach 2:
The invention utilizes parameter changes in the form of compositional gradients and stoichiometric control within the protective layer. By carefully controlling the ratios of Group 3 and Group 5 elements and adjusting the layer composition, the protective layer can effectively passivate surface defects while maintaining compatibility with the semiconductor core's crystal structure, thereby improving crystallizability without requiring overly complex multi-layer architectures.
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 protective layer effectively reduces surface defects, improving the light emitting element's life, efficiency, and crystallizability, leading to enhanced performance and durability in both temperature-stable and manufacturing contexts.
Implementation Method 1
the protective layer includes a first atom and a second atom, and wherein the first atom of the protective layer is at the first lattice point
Data Source
AI summary
A light emitting element and a display device including the same are provided. The light emitting element includes a first semiconductor layer, a second semiconductor layer, and an active layer between the first semiconductor layer and the second semiconductor layer, a protective layer surrounding an outer surface of at least one of the first semiconductor layer, the second semiconductor layer, and the active layer, and an insulating layer surrounding an outer surface of the protective layer. A surface of at least one of the first semiconductor layer, the second semiconductor layer, and the active layer includes a first lattice point, wherein the protective layer includes a first atom and a second atom, and wherein the first atom of the protective layer is at the first lattice point.