Quantum Dot Micro-LED Structure for Efficient Color Conversion
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Solution Overview
Problem
Existing semiconductor devices struggle to efficiently convert light emitted by light-emitting devices into specific colors using quantum dots, and there is a need for improved methods of fabricating such devices with enhanced light emission efficiency.
Innovation Solution
The semiconductor device incorporates nanoporous structures on light-emitting devices, where quantum dots are placed to convert light into specific colors. A conductive layer is fabricated to connect the light-emitting devices, and additional features like distributed Bragg reflectors and micro-lenses are included to enhance light emission and color filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If quantum dots are placed in nanoporous structures to convert light into specific colors, then light emission efficiency is improved, but device complexity increases
Solution Approach 1:
The patent utilizes nanoporous structures as substrates for quantum dot placement. The porous material provides a high-surface-area platform that enhances light absorption and quantum dot excitation efficiency, directly improving light emission efficiency while maintaining a relatively simple overall device structure
Solution Approach 2:
The invention combines quantum dots with nanoporous structures to create a composite light-conversion layer. This composite material approach enables efficient color conversion by integrating the light-absorbing properties of quantum dots with the structural advantages of nanoporous materials, achieving high efficiency without proportionally increasing device complexity
2Power
If a conductive layer is fabricated to connect light-emitting devices, then power output is improved, but manufacturing complexity increases
Solution Approach 1:
The patent integrates the conductive layer fabrication process with the existing manufacturing workflow by forming conductive interconnects between light-emitting devices during the same fabrication sequence. This merging of operations improves power output through better electrical connectivity while avoiding the need for additional separate manufacturing steps
Solution Approach 2:
The conductive layer serves multiple functions: it provides electrical connectivity between devices, acts as a structural support element, and facilitates heat dissipation. This multi-functionality approach improves power output and device performance without proportionally increasing manufacturing complexity, as a single layer accomplishes multiple objectives
3Productivity
If distributed Bragg reflectors and micro-lenses are added to enhance light emission, then light emission efficiency is improved, but device complexity increases
Solution Approach 1:
The distributed Bragg reflector is designed and positioned to pre-direct light paths before light emission occurs. By establishing the optical cavity structure and reflector positioning in advance, the system achieves enhanced light extraction efficiency and directional control without requiring complex real-time adjustments or additional active components
Solution Approach 2:
The patent incorporates micro-lenses that operate in the optical dimension to focus and direct light emission. By adding this optical dimensionality through lens structures, the system improves light extraction efficiency and beam control while maintaining a relatively simple additive structure rather than complicating the fundamental device architecture
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 enables efficient conversion of light into specific colors, improving light emission efficiency and power output while reducing voltage requirements, thus enhancing the performance of semiconductor devices.
Implementation Method 1
a first plurality quantum dots are placed in the first nanoporous structure for converting light emitted by the first light-emitting device into light of a first color
Data Source
AI summary
In accordance with one or more aspects of the present disclosure, an apparatus including micro-LEDs is provided. The apparatus may include a first nanoporous structure fabricated on a first light-emitting device and a second nanoporous structure fabricated on a second light-emitting device. A first plurality quantum dots are placed in the first nanoporous structure for converting light emitted by the first light-emitting device into light of a first color. A second plurality quantum dots are placed in the second nanoporous structure for converting light emitted by the second light-emitting device into light a second color. The apparatus further includes a third light-emitting device that emits light of a third color. The apparatus further includes a conductive layer of a conductive material. The conductive layer contacts the top surfaces of the first light-emitting device, the second surface of the second light-emitting device, and the third light-emitting device.