1D Metal Halide Perovskites for White Light Emission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current organic-inorganic hybrid perovskites face challenges in achieving efficient white-light emission with high quantum efficiency and stability, particularly in 2D structures, which often suffer from exciton self-trapping and color rendition issues.
Innovation Solution
Development of one-dimensional (1D) metal halide perovskites with tunable broadband emissions, incorporating dopants like Mn2+ ions, and using specific organic cations to achieve efficient light emission as a single broadband white phosphor, enabling the formation of self-trapped excited states and improved quantum confinement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If 2D perovskite structures are used, then solution processability is achieved, but quantum efficiency is limited to 9% or less due to exciton self-trapping
Solution Approach 1:
The patent transitions from 2D perovskite structures to 1D nanowire structures, changing the dimensionality to eliminate exciton self-trapping while maintaining solution processability. The 1D structure provides quantum confinement that prevents exciton migration to defect sites, achieving over 50% quantum efficiency while retaining low-temperature solution processing capabilities.
2Illumination intensity
If multiple phosphors are combined to achieve white light emission, then color rendition is improved, but device complexity and fabrication difficulty increase
Solution Approach 1:
The patent merges multiple phosphor functionalities into a single 1D perovskite nanowire material. By incorporating multiple dopants (Mn2+, Eu3+, Pr3+) within the same 1D crystal structure, the material emits multiple wavelengths simultaneously, achieving white light with excellent color rendition while simplifying device architecture to a single-layer configuration.
Solution Approach 2:
The patent creates a composite phosphor material combining host perovskite framework with multiple dopant ions (Mn2+, Eu3+, Pr3+). This composite structure enables simultaneous emission from different dopants, producing white light with tunable color temperature and excellent color rendering index, while maintaining the simplicity of a single-material device layer.
3Ease of manufacture
If individual phosphors are used with narrow emissions, then device fabrication is simplified, but color rendition deteriorates due to narrow emission bands
Solution Approach 1:
The patent changes the emission parameters by incorporating multiple dopants with different emission characteristics into a single 1D perovskite nanowire. The dopants Mn2+ (orange-red), Eu3+ (red), and Pr3+ (violet-blue) provide broad and overlapping emission bands, achieving excellent color rendition while maintaining the fabrication simplicity of a single-layer 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 1D metal halide perovskites demonstrate high photoluminescence quantum efficiency, achieving white-light emission with improved color rendition and stability, doubling the quantum efficiency of 2D perovskites and offering a cost-effective, easily processable solution for optoelectronic devices.
Implementation Method 1
Atomically thin two-dimensional (2D) perovskite sheets with well-defined square shapes and tunable luminescence have been prepared by solution phase growth
Implementation Method 2
The broadband emissions may be attributed to the exciton self-trapping in the quantum confined 1D structures
Data Source
AI summary
Provided herein are organic-inorganic hybrid-perovskites, including metal halide perovskites having a 1D crystal structure. The metal halide perovskites may be luminescent. The metal halide perovskites may include a dopant, including an emitter dopant. Methods of forming metal halide perovskites, and devices including the metal halide perovskites also are provided.