Polysiloxane Interlayer for Solvent-Resistant Solar Cells
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Solution Overview
Problem
Existing photoelectric conversion devices, such as solar cells, face performance and reliability issues due to the dissolution of carrier transport layers in highly polar solvents like DMSO, which degrades the device's efficiency and longevity.
Innovation Solution
Incorporating a polysiloxane layer with a polar functional group between the carrier transport layers and the photoelectric conversion layer, which contains an ionic crystalline compound, to enhance the device's stability and prevent solvent-induced degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a carrier transport layer is used in a photoelectric conversion device, then carrier transport function is improved, but the layer dissolves in highly polar solvents like DMSO, degrading device performance and reliability
Solution Approach 1:
The patent introduces a polysiloxane layer as an intermediary between the carrier transport layer and the photoelectric conversion layer. This intermediate layer acts as a protective barrier that prevents the carrier transport layer from direct contact with highly polar solvents during photoelectric conversion layer formation, thereby preventing dissolution while maintaining carrier transport functionality.
Solution Approach 2:
The patent employs a thin polysiloxane film layer to protect the carrier transport layer. This thin film provides sufficient protection against solvent penetration while being thin enough to not interfere with the overall device structure or performance, effectively serving as a protective shell.
2Stability of the object's composition
If a polysiloxane layer with polar functional group is introduced to prevent dissolution, then resistance to highly polar solvents is improved, but device structure becomes more complex
Solution Approach 1:
The patent modifies the polysiloxane material by introducing polar functional groups (such as hydroxyl, carboxyl, or amino groups) to change its chemical properties. This parameter change enables the polysiloxane layer to resist dissolution in highly polar solvents while maintaining its function as an intermediate layer.
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 polysiloxane layer improves the device's resistance to highly polar solvents, maintaining structural integrity and performance by facilitating carrier movement while preventing dissolution, thus enhancing the reliability and efficiency of the photoelectric conversion device.
Implementation Method 1
a polysiloxane layer between the first carrier transport layer and the photoelectric conversion layer, the polysiloxane layer containing a polysiloxane having a polar functional group R1
Implementation Method 2
a photoelectric conversion layer containing an ionic crystalline compound
Data Source
AI summary
A photoelectric conversion device includes: a first carrier transport layer; a photoelectric conversion layer containing an ionic crystalline compound; and a polysiloxane layer between the first carrier transport layer and the photoelectric conversion layer, the polysiloxane layer containing a polysiloxane having a polar functional group R1.