Perovskite Solar Cell Passivation Layer for Defect and Moisture Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Perovskite cells suffer from poor crystallization quality, high defect density, and instability due to water and oxygen erosion, leading to reduced energy conversion efficiency and service life.
Innovation Solution
A passivation layer comprising organic molecular passivation materials, metal oxide semiconductor materials, and metal halides is introduced between the hole transport layer and/or electron transport layer, enhancing interface contact, reducing defects, and optimizing crystallization quality, while also blocking water and oxygen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a passivation layer is introduced to improve interface contact and reduce defects, then energy conversion efficiency is improved, but device complexity increases
Solution Approach 1:
The patent introduces a passivation layer as an intermediary component between the charge transport layer and the perovskite light absorbing layer. This intermediate layer serves multiple functions: improving interface contact, reducing defect density, optimizing crystallization quality, and blocking water and oxygen erosion. By placing this mediator layer, the patent resolves the contradiction by achieving improved energy conversion efficiency while managing the increase in device complexity through a multi-functional single component approach.
Solution Approach 2:
The passivation layer is constructed using composite materials comprising organic molecular passivation materials, metal oxide semiconductor materials, and metal halides. This composite structure allows the single passivation layer to simultaneously achieve multiple functions (interface passivation, crystallization optimization, and environmental barrier), thereby improving energy conversion efficiency without proportionally increasing device complexity.
2Reliability
If the passivation layer uses multiple materials (organic molecular, metal oxide semiconductor, and metal halide), then stability and service life are improved by reducing water and oxygen erosion, but manufacturing complexity increases
Solution Approach 1:
The patent merges three different material types (organic molecular passivation materials, metal oxide semiconductor materials, and metal halides) into a single integrated passivation layer. This merging approach allows the layer to simultaneously provide interface passivation, crystallization optimization, and environmental protection against water and oxygen. By combining multiple material functions into one layer rather than using separate layers, the patent improves stability and service life while limiting the increase in manufacturing complexity.
Solution Approach 2:
The passivation layer is designed with multi-functionality, serving as both an interface passivation layer and an environmental barrier layer. The combination of organic molecular materials (for interface passivation), metal oxide semiconductor materials (for structural stability and water/oxygen barrier), and metal halides (for crystallization optimization) creates a universal layer that performs multiple protective and functional roles, thereby improving reliability without requiring multiple separate manufacturing steps.
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 passivation layer improves energy conversion efficiency, stability, and service life of perovskite cells by reducing non-radiative recombination and erosion, thereby enhancing overall performance.
Implementation Method 1
the passivation layer has good stability and can also reduce the erosion of perovskite materials by water and oxygen
Implementation Method 2
The defect density in the bulk and interface of the perovskite material can also be reduced through the coordination effect of the organic molecular passivation material
Implementation Method 3
When used in combination with metal oxide semiconductor materials and/or metal halides, they can further reduce non-radiative recombination at defects and further improve the energy conversion efficiency of perovskite cells
Data Source
AI summary
A perovskite solar cell and a photovoltaic module are provided. The perovskite solar cell includes a first electrode, a second electrode, a light absorbing layer, a hole transport layer, and an electron transport layer. The light absorbing layer is disposed between the first and second electrodes. The hole transport layer is positioned between the first electrode and the light absorbing layer, and the electron transport layer is positioned between the second electrode and the light absorbing layer. The solar cell further comprises a passivation layer disposed between the hole transport layer and the light absorbing layer and/or between the electron transport layer and the light absorbing layer. The passivation layer comprises at least two materials selected from an organic molecular passivation material, a metal oxide semiconductor material, and a metal halide. The passivation layer enhances device stability and photoelectric conversion efficiency.