Resistive Memory Metal Halide Perovskite Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional resistive random access memory devices face challenges with the stability and durability of their resistance change layers, particularly due to unstable distributions of HRS/LRS resistances and SET/RESET voltages in oxide-based solid electrolyte materials.
Innovation Solution
Incorporating a metal halide with a second perovskite crystal structure into the resistance change layer, which also includes an organic metal halide with a first perovskite crystal structure, to enhance durability and efficiency, along with a polymer protective layer for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If an oxide-based solid electrolyte material is used in the resistance change layer, then the device structure is simple, but the distribution of HRS/LRS resistances and SET/RESET voltages is very unstable and difficult to manipulate
Solution Approach 1:
The patent employs a composite material strategy by combining organic metal halide perovskite (OMHP) with inorganic metal halide perovskite (MHP) to form a hybrid resistance change layer. This composite structure integrates the advantages of both material types: the simplicity and ease of fabrication from oxide-based materials and the stability and controllable resistance characteristics from metal halide perovskites. The composite approach resolves the contradiction by achieving both structural simplicity and reliability through material hybridization.
Solution Approach 2:
The patent utilizes parameter changes by systematically varying the composition ratio between OMHP and MHP in the resistance change layer. By adjusting the proportion of each component, the device achieves optimal balance between structural simplicity and resistance stability. This parameter optimization allows fine-tuning of HRS/LRS distribution and SET/RESET voltage characteristics while maintaining ease of fabrication.
2Ease of manufacture
If conventional perovskite structure materials are used in the resistance change layer, then the manufacturing process is simple, but the durability and efficiency are insufficient
Solution Approach 1:
The patent applies composite materials by forming a resistance change layer that contains both organic metal halide perovskite and inorganic metal halide perovskite. This composite structure maintains the ease of manufacture through solution-based processing while significantly improving durability and efficiency. The combination of organic and inorganic components creates a more robust material system that retains fabrication simplicity while enhancing device performance and longevity.
Solution Approach 2:
The organic metal halide perovskite acts as an intermediary material that facilitates the integration of inorganic metal halide perovskite into the device structure. This intermediary component enables the inorganic perovskite to be incorporated through simple solution processing while the organic component provides structural framework and processability. The intermediary role of OMHP allows the system to achieve improved durability without compromising ease of manufacture.
3Reliability
If a metal halide with second perovskite crystal structure is incorporated into the resistance change layer, then durability and efficiency are improved, but the device complexity increases
Solution Approach 1:
The patent manages device complexity through parameter changes by optimizing the composition ratio and crystal structure parameters of the metal halide perovskite components. By carefully controlling the proportion of second perovskite structure material and adjusting crystallographic parameters, the device achieves improved durability and efficiency while keeping the structural complexity at acceptable levels. This parameter optimization allows the system to benefit from enhanced material properties without excessive complexity.
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 proposed solution results in a resistive random access memory device with higher durability and efficiency, characterized by improved hysteresis-based low voltage operation and increased on/off ratio, leading to enhanced reliability and lifespan.
Implementation Method 1
The resistance of the resistive random access memory device is changed as a metal filament is formed and eliminated by redox reactions of metal atoms or metal ions permeating from a metal electrode into the resistance change layer depending on a voltage applied to the resistance change layer
Implementation Method 2
a metal filament is formed and eliminated by redox reactions of metal atoms or metal ions permeating from a metal electrode into the resistance change layer
Data Source
AI summary
The present disclosure relates to a resistive random access memory device and a preparing method thereof.