Perovskite Solar Cell Interface Treatment for Defect Removal
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Solution Overview
Problem
Conventional perovskite solar cell surface treatment technologies fail to effectively remove surface defects and improve energy level matching with the electron transport layer, leading to reduced efficiency, particularly in p-i-n-structured solar cells.
Innovation Solution
A method involving the formation of a perovskite solar cell with a light-absorbing layer using a perovskite compound, an interface layer treated with multiple compounds at the A 1< or A 2< positions, and an electron transport layer, utilizing a combination of compounds to enhance energy level matching and defect removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional perovskite surface treatment technologies are used to remove surface defects, then surface defect removal is improved, but energy level matching with electron transport layer deteriorates
Solution Approach 1:
The patent uses a composite treatment solution containing multiple compounds (PEAI and FAI in a weight ratio of 3:7) to treat the perovskite surface. This composite approach allows simultaneous achievement of surface defect removal and energy level matching with the electron transport layer, resolving the contradiction between improving surface quality and maintaining energy alignment.
Solution Approach 2:
The patent optimizes the weight ratio of PEAI to FAI in the treatment solution and controls the treatment temperature (100°C) and time (10 minutes) to achieve optimal balance between defect removal and energy level matching. By adjusting these parameters, both surface quality and energy alignment are improved simultaneously.
2Reliability
If multiple compounds are used in the surface treatment solution to improve energy matching, then energy level matching is improved, but device complexity increases
Solution Approach 1:
The patent employs a composite treatment solution with two specific compounds (PEAI and FAI) in an optimized weight ratio. This composite material approach achieves improved energy level matching while maintaining relatively simple processing, balancing the trade-off between performance improvement and complexity increase.
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 method improves current (J SC ) and fill factor, enhancing the overall efficiency of the solar cell and, when applied in a silicon/perovskite tandem structure, increases the open circuit voltage (V OC ), thereby maximizing the efficiency of tandem solar cells.
Implementation Method 1
removing surface defects from the perovskite layer
Implementation Method 2
improving energy matching with an electron transport layer
Implementation Method 3
after light absorption, photo-excited charges are generated
Implementation Method 4
photo-excited charges are generated, and then, electrons and holes are separated by the internal potential of a device
Data Source
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AI summary
The present invention relates to an interface treatment method of a perovskite layer for improving the performance of a perovskite solar cell and a perovskite solar cell interface-treated by the method and, specifically, to an interface treatment method of a perovskite layer for improving the performance of a perovskite solar cell and a perovskite solar cell interface-treated by the method, whereby the degradation of solar cell performance can be prevented by removing surface defects from the perovskite layer as well as improving energy matching with an electron transport layer.