Nano Structure Light Emission Device Side Contact Electrodes
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Solution Overview
Problem
Current light emission devices face inefficiencies due to limited contact area between electrodes and nano structures, which restricts light extraction efficiency.
Innovation Solution
The design enhances light emission efficiency by increasing the contact area between electrodes and nano structures through the formation of nano-sized light emission devices with a large-scaled light emission area, utilizing a substrate with a mask layer and nano structures grown perpendicular to it, and the deposition of multi-layered thin film structures with quantum active layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If electrodes are arranged at both ends of the nano structure with conventional contact methods, then the device structure is simple, but the contact area between electrode and nano structure is limited, reducing light extraction efficiency
Solution Approach 1:
The patent transitions from conventional end-contact configuration to side-contact configuration, where electrodes wrap around the lateral surfaces of the nano structure. This dimensional change from 0D point contact to 1D/2D surface contact dramatically increases the contact area between electrode and nano structure, thereby improving light extraction efficiency while maintaining manufacturing feasibility through standard deposition techniques
2Reliability
If the contact area between electrode and nano structure is increased, then light extraction efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple electrode layers (conductive layer, reflective layer, transparent conductive oxide layer) into an integrated electrode assembly that collectively contacts the nano structure. This consolidation achieves large contact area for improved light extraction while managing complexity through functional integration of multiple layers into a unified electrode system
3Productivity
If multi-layered thin film structures with quantum active layers are deposited, then light emission efficiency and output are increased, but the manufacturing process complexity increases
Solution Approach 1:
The patent employs preliminary substrate preparation including surface cleaning, activation treatment, and seed layer deposition before the main quantum active layer deposition. These preliminary actions ensure optimal adhesion and crystalline quality of subsequent layers, enabling high light emission efficiency while streamlining the overall manufacturing process by preventing defects that would require rework
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
This configuration significantly increases light emission efficiency and output by minimizing contact resistance and maximizing electric and thermal conductivity, enabling the production of high-efficiency light emitting diodes and lasers.
Implementation Method 1
A light emission device using such a feature of the nano structure has been actively developed. A light emission device using the nano structure acquires light from the nano structure by arranging electrodes at both ends of the nano structure and applied voltages to the electrodes.
Data Source
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AI summary
The present invention provides a light emission device and a manufacturing method thereof. The light emission device includes: i) a substrate; ii) a mask layer disposed on the substrate and having at least one opening; iii) a light emission structure formed on the mask layer surrounding the opening and extended substantially perpendicular to a surface of the substrate; iv) a first electrode formed on the mask layer while surface-contacting the external surface of the light emission structure; and v) a second electrode disposed in the light emission structure and surface-contacting the internal surface of the light emission structure.