Solar Cell Coating Composition for Atmospheric Moisture Barriers
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Solution Overview
Problem
Existing methods for forming water-vapor barriers in perovskite solar cells require vacuum environments, which are complex and costly, making it difficult to scale up the process.
Innovation Solution
A solar cell element coating composition comprising organopolysiloxane, an organosilicon compound with silicon-bonded hydrogen atoms, and a platinum group metal catalyst that can be cured under atmospheric pressure to form a protective film with high water-vapor barrier properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plasma CVD or DC sputtering is used to form water-vapor barrier films, then water-vapor barrier properties are improved, but device complexity and manufacturing cost increase due to vacuum requirements
Solution Approach 1:
The invention changes the operating pressure parameter from vacuum (in plasma CVD and DC sputtering) to atmospheric pressure. The coating composition uses a platinum catalyst that enables silicone resin curing at atmospheric pressure, eliminating the need for vacuum equipment while achieving the same water-vapor barrier function.
Solution Approach 2:
The invention replaces the mechanical vacuum system with a chemical catalysis system. Instead of using vacuum equipment to enable film formation, the patent uses a platinum catalyst to enable the curing reaction at atmospheric pressure, substituting a complex mechanical system with a simpler chemical process.
2Reliability
If plasma CVD or DC sputtering is used to form water-vapor barrier films, then water-vapor barrier properties are improved, but manufacturing cost increases due to vacuum equipment and process complexity
Solution Approach 1:
The invention changes the operating pressure parameter from vacuum to atmospheric pressure, eliminating the need for expensive vacuum equipment. The platinum catalyst enables the curing reaction to proceed efficiently at atmospheric pressure, significantly reducing manufacturing costs while maintaining water-vapor barrier performance.
3Manufacturing precision
If vacuum processes are used to form protective films, then film quality is improved, but scalability is reduced due to device size constraints from vacuum chamber requirements
Solution Approach 1:
The invention changes the pressure parameter from vacuum to atmospheric pressure, allowing the coating process to be performed outside vacuum chambers. This enables the processing of large-area substrates and facilitates scaling up production without being constrained by vacuum chamber size.
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 composition allows for the direct application and curing of a protective film on solar cells under atmospheric pressure, providing effective water-vapor barrier properties without the complexity and cost of vacuum processes, maintaining cell performance even after exposure to harsh environments.
Implementation Method 1
a platinum group metal catalyst that is activated by light having a wavelength of from 200 to 500 nm
Data Source
AI summary
Provided is a solar cell element coating composition comprising(A) an organopolysiloxane which is represented by the following average unit formula (1):[where R1 is an alkenyl group, R2 is a monovalent saturated hydrocarbon group, R3 is a monovalent saturated hydrocarbon group or an aryl group, Ar is an aryl group, a is an integer of 1-100, b is an integer of 0-1,000, and a/(a+b) is a number of 0.01 to 1.0)],(B) an organic silicon compound which has a hydrogen atom bonded to at least two silicon atoms in one molecule, and(C) a platinum group metal catalyst which is activated by light of a wavelength of 200-500 nm.The solar cell element coating composition can be applied directly onto a solar cell element in an organic thin film solar cell, a perovskite solar cell, and the like.