LixZnx-1 O P-Type Semiconductor Material Fabrication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Development of stable and reproducible zinc oxide based p-type semiconductor materials has been hindered by their unstable characteristics, which is essential for forming PN junctions in photoelectric and semiconductor devices.
Innovation Solution
A p-type metal oxide semiconductor material with the formula LixZnx-1 O is achieved by mixing lithium and zinc salts with a chelating agent, forming a metal complex compound, and undergoing a heating process to produce a powder with a controlled Li/Zn ratio of 0.0005 to 0.01, enabling the creation of a stable p-type semiconductor material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If zinc oxide based p-type semiconductor materials are developed, then both n-type and p-type materials are available for forming PN junctions, but the materials exhibit unstable characteristics and bad reproducibility
Solution Approach 1:
The patent applies parameter changes by precisely controlling the Li/Zn ratio within 0.0005 to 0.01 and maintaining specific doping concentrations (10^16 to 10^19 atoms/cm³) to achieve stable p-type characteristics. This quantitative parameter control resolves the instability issue while enabling reliable PN junction formation
Solution Approach 2:
The patent introduces lithium as an intermediary dopant element in zinc oxide to achieve stable p-type conductivity. The lithium atoms act as mediators that create hole carriers through specific substitutional doping mechanisms, providing reproducible p-type characteristics that enable PN junction fabrication
2Reliability
If lithium doping is applied to zinc oxide to achieve p-type conductivity, then carrier concentration and mobility are improved, but precise control of doping ratio is required to maintain stability
Solution Approach 1:
The patent establishes specific parameter ranges for Li/Zn ratio (0.0005 to 0.01) and doping concentration (10^16 to 10^19 atoms/cm³) to achieve optimal p-type conductivity. These precisely defined parameters resolve the contradiction by providing a narrow but achievable target range that ensures both stability and manufacturability
Solution Approach 2:
The patent employs controlled excess lithium doping within the specified ratio range to ensure sufficient hole carrier generation while preventing over-doping that would cause instability. This partial excess approach maintains reliable p-type characteristics without requiring extremely precise control
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 resulting material exhibits a high concentration of holes, faster carrier mobility, and lower resistivity, making it suitable for transparent semiconductor and photoelectric devices, particularly forming a stable p-type semiconductor material within the specified Li/Zn ratio range.
Implementation Method 1
providing a lithium salt and a zinc salt to be mixed in a solution; adding a chelating agent to the mixed solution to form a metal complex compound comprising lithium and zinc
Implementation Method 2
performing a heating process for the metal complex compound to form a p-type metal oxide semiconductor material powder
Data Source
AI summary
A fabrication method for a p-type metal oxide semiconductor material is disclosed, including providing a lithium salt and a zinc salt to be mixed in a solution, wherein to the solution is added a chelating agent to form a metal complex compound comprising lithium and zinc. A heating process for the metal complex compound to form a p-type metal oxide semiconductor material powder is performed, having a formula LixZnx-1 O.