Laser Light-Emitting Chip Groove Structure for Carrier Confinement
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Solution Overview
Problem
Current light-emitting chips in laser sources have low injection efficiency and current density, leading to poor luminous effect and output power due to lateral diffusion of current, which affects the stability and reliability of the light-emitting chip.
Innovation Solution
Incorporating a groove in the non-light-emitting portion of the light-emitting layer proximal to the second electrode, which intersects with the light-emitting portion, to block current diffusion and enhance intensive current injection to the light-emitting portion, thereby improving current density and photoelectric conversion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional light-emitting chip structure is used, then the device complexity is low, but the current density and injection efficiency are low leading to poor luminous effect
Solution Approach 1:
The light-emitting layer is divided into a light-emitting portion and a non-light-emitting portion, with the groove physically separating these regions to prevent carrier diffusion from the light-emitting portion to the non-light-emitting portion, thereby improving current density and injection efficiency
Solution Approach 2:
The groove is selectively positioned at the boundary between the light-emitting portion and non-light-emitting portion, creating a localized barrier that confines carriers to the light-emitting region, thereby enhancing luminous effect without affecting overall device complexity
2Device complexity
If the light-emitting layer allows free carrier movement, then the device structure is simple, but carriers diffuse from the light-emitting portion to the non-light-emitting portion reducing current density
Solution Approach 1:
The light-emitting layer is segmented into functional regions (light-emitting portion and non-light-emitting portion) separated by the groove, which confines carriers to the light-emitting portion and prevents diffusion to the non-light-emitting portion, thereby maintaining high current density
Solution Approach 2:
The groove acts as an intermediary barrier between the light-emitting portion and non-light-emitting portion, blocking carrier diffusion while allowing the simple overall structure to be maintained
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 solution increases the current density and luminous effect of the light-emitting chip, reducing the threshold current and improving the stability and reliability of the light-emitting chip, resulting in a better luminous effect and output power for the laser source.
Implementation Method 1
the groove is used to block movement of carriers in the light-emitting layer from the light-emitting portion to the non-light-emitting portion
Implementation Method 2
a light-emitting layer, an insulating layer and a second electrode which are sequentially arranged in a first direction; wherein the light-emitting layer includes a light-emitting portion and a non-light-emitting portion
Data Source
AI summary
A light-emitting device and a laser are provided. The light-emitting device includes a first electrode, a light-emitting layer, an insulating layer and a second electrode which are sequentially arranged in a first direction; the light-emitting layer comprises a light-emitting portion and a non-light-emitting portion, an end of the light-emitting portion in the first direction is in contact with the second electrode through a via hole in the insulating layer, another end of the light-emitting portion in the first direction is in contact with the first electrode, and the non-light-emitting portion is covered by the insulating layer; and a surface of the non-light-emitting portion covered by the insulating layer is provided with a groove, the groove extends along a boundary between the light-emitting portion and the non-light-emitting portion, and the groove is used to block movement of carriers in the light-emitting layer from the light-emitting portion to the non-light-emitting portion.