Ligand Surface Modification for LED Dispersibility
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Solution Overview
Problem
Current manufacturing processes for light emitting elements face challenges in achieving high dispersibility and reliability, particularly in the context of subminiature LEDs, which affect the yield and performance of display devices.
Innovation Solution
A light emitting element with a modified surface, featuring a first ligand with multiple functional group chains and a second ligand of shorter carbon length, bonded to the surface, enhancing dispersibility and ligand substitution rate, thereby improving the alignment and density of light emitting elements in display devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single type of ligand is used for surface modification of light emitting elements, then the surface modification process is simple, but the dispersibility and ligand substitution rate are insufficient
Solution Approach 1:
The ligand system is segmented into two distinct types: a first ligand with a specific structure and a second ligand with a different structure. This segmentation allows each ligand type to perform specific functions - the first ligand provides primary surface modification while the second ligand enhances dispersibility and substitution rate, thereby resolving the contradiction between simple modification and adequate dispersibility.
Solution Approach 2:
The surface modification employs a composite ligand system combining two different ligand types with distinct structural characteristics. This composite approach integrates the advantages of both ligands - the first ligand's bonding capability and the second ligand's dispersibility enhancement - achieving superior overall performance that neither ligand could provide alone.
2Productivity
If ligand structure is optimized for better dispersibility, then manufacturing yield improves, but the manufacturing process complexity increases
Solution Approach 1:
The invention optimizes specific parameters of the ligand structures - such as carbon chain length, functional group types, and molecular weight - to achieve enhanced dispersibility and manufacturing yield. By carefully controlling these parameters within specific ranges, the invention improves productivity while avoiding excessive process complexity.
3Area of stationary object
If longer carbon chain ligands are used, then surface coverage is improved, but dispersibility in solution decreases
Solution Approach 1:
The invention applies different ligand types to different functional requirements: the first ligand with appropriate carbon chain length provides sufficient surface coverage, while the second ligand with optimized structure enhances solution dispersibility. This local quality differentiation resolves the contradiction between surface coverage and dispersibility by assigning specific ligand types to specific functions.
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 modified surface ligand structure enhances the dispersibility and reliability of light emitting elements in solutions, leading to increased manufacturing yield and product reliability of display devices.
Implementation Method 1
at least one ligand bonded to a surface of the member
Data Source
AI summary
A light emitting element includes: a member including a semiconductor layer and an active layer; and at least one ligand bonded to a surface of the member; wherein the at least one ligand includes: a first ligand including two or more functional group chains; and a second ligand having a shorter carbon length than the first ligand.