Perovskite Solar Cell Production Ventilation to Suppress Pinholes
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Solution Overview
Problem
Conventional manufacturing methods for perovskite solar cells often generate pinholes in the photoelectric conversion layer, leading to reduced power generation performance and potential short circuits.
Innovation Solution
A manufacturing device and method that includes a ventilation unit to reduce the gas concentration of organic compounds near the application surface by ventilating the vicinity, using an exhaust fan or air blower, and controlling the ventilation amount based on gas concentration detection to ensure uniform crystal nuclei formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a precursor solution is applied and dried without ventilation, then the manufacturing process is simple, but pinholes are generated in the photoelectric conversion layer
Solution Approach 1:
A ventilation unit is introduced as an intermediary component between the precursor solution application and the photoelectric conversion layer formation. This ventilation unit removes excess organic compound gases from the vicinity of the application surface, preventing pinhole formation without requiring fundamental changes to the application or drying processes.
Solution Approach 2:
The patent changes the environmental parameter (gas concentration of organic compounds) in the vicinity of the application surface by introducing ventilation. This parameter change prevents the formation of pinholes during the drying and crystallization process, improving the quality of the photoelectric conversion layer.
2Reliability
If ventilation is applied to reduce gas concentration, then pinhole generation is suppressed, but the device complexity increases
Solution Approach 1:
The ventilation unit serves as an intermediary system that selectively removes harmful organic compound gases from the processing environment. This targeted intervention improves reliability by preventing pinholes while adding minimal complexity compared to complete process redesign.
3Manufacturing precision
If gas concentration is not controlled, then the manufacturing process is simple, but surface roughness increases
Solution Approach 1:
The patent implements a feedback control system where gas concentration is detected and ventilation is adjusted accordingly. This automated feedback loop maintains optimal gas concentration levels to minimize surface roughness while reducing manual intervention and improving process consistency.
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
Suppresses pinhole generation and reduces surface roughness in the photoelectric conversion layer, improving the quality and performance of perovskite solar cells.
Implementation Method 1
a ventilation unit that ventilates a vicinity of the application surface
Implementation Method 2
a poor solvent application unit that applies a poor solvent having a lower solubility for the perovskite compound than a solubility for the perovskite compound of a solvent of the precursor solution over the application surface with the precursor solution applied
Implementation Method 3
the crystal nuclei of the perovskite compound can be uniformly formed in a plane
Data Source
AI summary
Provided is a manufacturing device and a manufacturing method for a perovskite solar cell capable of suppressing generation of pinholes in a photoelectric conversion layer. The manufacturing device for a perovskite solar cell is a device for manufacturing a perovskite solar cell including a photoelectric conversion layer containing a perovskite compound, and includes a precursor solution application unit that applies a precursor solution containing the perovskite compound as a solute over an application surface; a poor solvent application unit that applies a poor solvent having a lower solubility for the perovskite compound than that of a solvent of the precursor solution over the application surface with the precursor solution applied; and a ventilation unit that ventilates a vicinity of the application surface.