Graphene-Zinc Oxide LED Electrode Light Amplification
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Solution Overview
Problem
Current light emitting diode (LED) technologies face limitations in efficiency and cost due to the need for expensive noble metals for surface plasmon effects, and there is a need for materials that can enhance light emission while reducing power consumption.
Innovation Solution
A light emitting device incorporating a graphene layer on an electrode, specifically using pristine or doped graphene with elements like nitrogen, fluorine, manganese, oxygen, gold, and bismuth, integrated with a zinc oxide thin film to amplify light emission efficiency, fabricated through techniques such as photolithography and annealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If expensive noble metals are used to achieve surface plasmon effects for light amplification, then light emission efficiency is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive noble metals with inexpensive materials such as doped zinc oxide, silicon, or graphene that can achieve surface plasmon effects. These cheaper materials are used as alternative plasmon-active layers to reduce manufacturing costs while maintaining light amplification functionality.
Solution Approach 2:
The patent modifies the physical and chemical parameters of materials like zinc oxide through doping with aluminum, gallium, or indium to adjust their optical and electrical properties. This enables these materials to exhibit surface plasmon effects similar to noble metals, achieving light amplification without using expensive materials.
2Productivity
If conventional electrode materials are used in light emitting diodes, then manufacturing process is simple, but light emission efficiency is limited
Solution Approach 1:
The patent employs composite material structures combining zinc oxide with dopants (aluminum, gallium, indium) or integrating with graphene layers. These composite structures enable surface plasmon effects and enhanced light emission while maintaining compatibility with existing LED manufacturing processes.
Solution Approach 2:
The patent introduces an intermediate plasmon-active layer between the electrode and the light-emitting active layer. This intermediate layer, made of doped zinc oxide or graphene, mediates the interaction between the electrode and the active layer to amplify light emission through surface plasmon effects without disrupting the overall device structure.
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 integration of graphene with zinc oxide electrodes enhances light emission efficiency by up to 80% while maintaining low power consumption and reducing costs, making it suitable for industrial lighting applications.
Implementation Method 1
Through surface plasmon effects exhibited from a metal surface, the intensity of an electromagnetic field on the metal surface may be amplified
Implementation Method 2
a light emitting diode device, a solid electronic device converting current into light
Data Source
AI summary
The purpose of the present invention is to provide a method for manufacturing a light-amplified optoelectronic device, on which pristine or doped graphene is transferred. Specifically, the method includes the steps of: depositing a first electrode, as a thin film, on the light emitting device; transferring pristine or doped graphene on the electrode thin film; etching the light emitting device in contact with the electrode thin film on which the transferred graphene has been transferred, thereby removing a part of the electrode thereon; spin-coating photoresist on the etched light emitting device; removing the photoresist from the spin-coated light emitting device, thereby forming an electrode thin film in a spin form and the pristine transferred to or graphene doped to the electrode thin film; and depositing metal on a second electrode.