Electrolytic Polymerization of Organic Electron Transport Layer
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Solution Overview
Problem
Existing photoelectric elements face challenges in achieving both excellent electron transport properties and a sufficiently wide reactive interface, leading to insufficient photoelectric conversion efficiency, particularly due to material stability and solubility issues in organic-type electron transport layers and limited interface width in inorganic-type layers.
Innovation Solution
A photoelectric element is designed with an electron transport layer formed from an organic compound produced by electrolytic polymerization of a precursor containing specific moieties, which includes a gel layer infiltrated with an electrolyte solution, enhancing electron transport and widening the reactive interface, and a photosensitizer is chemically bonded to the organic compound for improved charge separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If an organic-type electron transport layer is formed using a fullerene or similar material, then the electron transport capability is improved, but the material exhibits poor stability and high solubility to solvents, decreasing flexibility in device designing
Solution Approach 1:
The patent changes the molecular weight parameter of the electron transport material from low (fullerene) to high (polymer), which fundamentally alters the material's stability and solubility characteristics while maintaining electron transport capability
Solution Approach 2:
The patent creates a composite electron transport layer combining organic polymer materials with inorganic nanoparticle materials, achieving both high electron transport capability and improved stability while reducing solubility issues
2Stability of the object's composition
If an inorganic-type electron transport layer is formed using titanium oxide or similar material, then the material stability is improved, but a sufficiently wide reactive interface is not formed, and the conversion efficiency is insufficient
Solution Approach 1:
The patent forms a composite electron transport layer combining inorganic nanoparticle materials with organic polymer materials, where the organic component provides a wide reactive interface and the inorganic component provides stability and electron transport pathways
Solution Approach 2:
The patent creates different functional zones within the electron transport layer: the organic polymer phase provides wide interfacial contact for charge separation, while the inorganic nanoparticle phase provides stable electron transport pathways
3Area of stationary object
If the reactive interface is widened to improve charge separation, then the photoelectric conversion efficiency is improved, but the electron transport capability may be reduced
Solution Approach 1:
The composite structure allows the organic polymer phase to provide extensive interfacial area for charge separation while the inorganic nanoparticle phase provides continuous electron transport pathways, resolving the trade-off between interface area and transport speed
Solution Approach 2:
The electron transport layer is segmented into multiple phases (organic polymer matrix and inorganic nanoparticle dispersion), where each phase performs its specialized function: charge separation at interfaces and electron transport through inorganic pathways
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 solution results in a high photoelectric conversion efficiency by ensuring excellent electron transport and a wide reactive interface, reducing recombination of electrons and holes, and improving the stability and solubility of the electron transport layer.
Implementation Method 1
The electron transport layer is formed of an organic compound produced by electrolytic polymerization of a precursor having, within one molecule thereof, two or more moieties each having a structure represented by the following structural formula (1). The photoelectric element includes a gel layer composed of the organic compound and an electrolyte solution infiltrated into the organic compound.
Implementation Method 2
The present invention relates to a photoelectric element that converts light into electrical energy
Implementation Method 3
The electron transport layer is formed of an organic compound produced by electrolytic polymerization of a precursor having, within one molecule thereof, two or more moieties each having a structure represented by the following structural formula (1)
Data Source
AI summary
A photoelectric element 1 includes a first electrode, an electron transport layer supporting a photosensitizer, a hole transport layer, and a second electrode, and these components are stacked in the above order. The electron transport layer is formed of an organic compound produced by electrolytic polymerization of a precursor having, within one molecule thereof, two or more moieties each having a structure represented by the following structural formula (1). The photoelectric element 1 includes a gel layer composed of the organic compound and an electrolyte solution infiltrated into the organic compound.(in structural formula (1), M is a cyano group, a fluoro group, a chloro group, or a bromo group, and A− is a counter-anion)