Ammonia-Filled Perovskite Solar Cell Packaging for Thermal Stability
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Solution Overview
Problem
Perovskite solar cells suffer from poor stability due to decomposition under light, heat, water, and oxygen, leading to reduced photoelectric conversion efficiency and limited service life, despite adequate sealing.
Innovation Solution
Incorporating a sealed cavity within the perovskite solar cell containing 10%-100% ammonia gas and residual inert gas, which inhibits the migration and decomposition of organic amine cations, improving thermal stability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If perovskite solar cell is sealed with conventional packaging, then sealing performance is improved, but service life is still limited due to decomposition under light, heat, water, and oxygen
Solution Approach 1:
The patent introduces ammonia gas as an inert atmosphere filling the sealed cavity to create a protective environment that prevents decomposition of the perovskite material. The ammonia gas concentration is controlled at 10%-100% to inhibit chemical reactions with water and oxygen, thereby extending service life while maintaining sealing performance.
Solution Approach 2:
The patent uses ammonia gas as an intermediary substance between the perovskite material and the external environment (water and oxygen). This intermediary layer provides additional protection against decomposition, working synergistically with the sealing structure to significantly extend the service life of the solar cell.
2Stability of the object's composition
If ammonia gas is introduced to inhibit decomposition, then thermal stability and service life are improved, but device complexity increases due to gas filling and concentration control
Solution Approach 1:
The patent controls the ammonia gas concentration parameter within a specific range (10%-100%) to achieve optimal protection效果. By adjusting this parameter, the patent balances the protective effect against decomposition with the complexity of the packaging system, finding the optimal point where service life extension is maximized without excessive complexity.
3Duration of action of stationary object
If ammonia gas volume fraction is increased to improve protection效果, then service life is extended, but production cost increases
Solution Approach 1:
The patent optimizes the ammonia gas volume fraction parameter within the range of 10%-100%, identifying that lower concentrations (10%-50%) can provide sufficient protection while significantly reducing production costs compared to using pure ammonia gas. This parameter optimization resolves the contradiction between service life extension and manufacturing cost.
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 solution enhances the light conversion efficiency and service life of the perovskite solar cell by stabilizing the perovskite material, with optimal ammonia gas volume fractions of 50%-70% offering the best balance of cost, safety, and performance.
Implementation Method 1
the sealed cavity contains ammonia gas having a volume fraction of 10%-100% and residual inert gas, which can effectively inhibit migration and decomposition of organic amine cations in the perovskite material and improves thermal stability of the perovskite solar cell device
Data Source
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AI summary
Embodiments of the present application provide a perovskite solar cell and a preparation method therefor, and an electrical device. The perovskite solar cell comprises: a backplate; a transparent substrate, a sealed cavity being formed between the transparent substrate and the backplate; and a perovskite solar cell device located in the sealed cavity, wherein the sealed cavity contains ammonia gas having a volume fraction of 10%-100% and a balance of inert gas. The 10%-100% ammonia gas can improve the chemical stability of a perovskite material, thereby improving the thermal stability of a perovskite solar cell device and further improving the efficiency and service life of a perovskite solar cell.