LED Shell Layer Structure for Semiconductor Defect Compensation
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Solution Overview
Problem
Existing display devices face issues with semiconductor layer defects that lower emission efficiency in light-emitting elements, such as LEDs.
Innovation Solution
A light-emitting element design incorporating a shell layer made of divalent metal elements like ZnS, ZnSe, MgS, MgSe, ZnMgS, or ZnMgSe on the semiconductor layers, surrounded by an insulating film, to compensate for defects and enhance emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If semiconductor layers are used in light-emitting elements, then light emission function is achieved, but defects in semiconductor layers reduce emission efficiency
Solution Approach 1:
A shell layer comprising a divalent metal element is introduced as an intermediary between the semiconductor layers and the external environment. This shell layer compensates for defects in the semiconductor layers, preventing non-radiative recombination at defect sites and thereby improving emission efficiency while maintaining the light emission function of the semiconductor structure
2Loss of energy
If shell layer with divalent metal element is added, then defect compensation and emission efficiency improve, but device structure becomes more complex
Solution Approach 1:
The shell layer is designed as a thin film structure that envelops the semiconductor layers. This thin film approach provides defect compensation functionality while minimizing the additional structural complexity and maintaining a compact overall device design
3Loss of energy
If shell layer is formed on semiconductor layers, then emission efficiency improves, but manufacturing process becomes more complex
Solution Approach 1:
The shell layer is formed on the semiconductor layers during the fabrication process, integrating defect compensation into the manufacturing sequence. This preliminary formation of the shell layer ensures defect compensation is built into the structure from the outset, improving emission efficiency while managing manufacturing complexity through process integration
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 proposed design effectively compensates for semiconductor layer defects, improving emission efficiency and maintaining performance in display devices.
Implementation Method 1
a light-emitting element including semiconductor layers and a shell layer formed on the outer surfaces of the semiconductor layers and thereby having any defects in the semiconductor layers compensated for
Data Source
AI summary
A light-emitting element includes a first semiconductor layer doped to have a first polarity, a second semiconductor layer doped to have a second polarity different from the first polarity, a light-emitting layer disposed between the first and second semiconductor layers, a shell layer formed on side surfaces of the first semiconductor layer, the light-emitting layer, and the second semiconductor layer, the shell layer including a divalent metal element, and an insulating film covering an outer surface of the shell layer and surrounding the side surface of the light-emitting layer.