Photoelectric Conversion Module With Porous Carbon Interconnects
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Solution Overview
Problem
Conventional photoelectric conversion element modules suffer from durability issues and suboptimal photoelectric conversion efficiency, despite reported high efficiencies.
Innovation Solution
A photoelectric conversion element module comprising multiple elements with a transparent conductive film, a first charge transport layer, and a second charge transport layer formed of a carbon material-containing porous film, where adjacent elements are connected via conductive adhesive layers and current-collecting electrodes, enhancing electrical connection and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional photoelectric conversion element modules are used, then high photoelectric conversion efficiency can be achieved, but durability is poor
Solution Approach 1:
The patent uses a composite structure combining transparent conductive film, charge transport layers, power-generating layer, and conductive adhesive layers with carbon materials to create a photoelectric conversion element that achieves both high efficiency and durability. The multi-layer composite structure allows optimization of each layer's properties for both performance and stability.
Solution Approach 2:
The patent applies different materials and structures to different regions of the photoelectric conversion element. Specifically, the second charge transport layer uses a porous film structure with carbon materials in specific areas to enhance electrical connection and durability locally, while maintaining overall device performance.
2Reliability
If partitioning walls are placed across gaps between adjacent solar cells, then deterioration and short-circuiting are prevented, but photoelectric conversion efficiency decreases
Solution Approach 1:
The patent removes the traditional partitioning wall structure that blocked light and reduced efficiency. Instead, it extracts only the essential protective function and implements it through conductive adhesive layers and porous films at specific locations, allowing light to pass through previously blocked areas while still preventing deterioration and short-circuiting.
Solution Approach 2:
The patent introduces conductive adhesive layers containing carbon materials as intermediary elements between adjacent photoelectric conversion elements. These intermediaries provide both electrical connection and protective functions without blocking light, replacing the traditional partitioning wall approach.
3Reliability
If electrical connection between adjacent photoelectric conversion elements is improved, then durability increases, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into the conductive adhesive layers and porous films. These layers simultaneously provide electrical connection between adjacent elements, mechanical bonding, and protection against deterioration, eliminating the need for separate connection and protection components.
Solution Approach 2:
The conductive adhesive layers with carbon materials serve multiple purposes: they provide electrical conductivity for current collection, mechanical adhesion between layers, and protection against environmental deterioration. This multi-functionality reduces overall device complexity while improving durability.
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 module achieves high photoelectric conversion efficiency and excellent durability by stabilizing electrical connections through a porous carbon material layer, reducing internal resistance, and preventing short-circuiting.
Implementation Method 1
the second charge transport layer of one photoelectric conversion element and the transparent conductive film of the other photoelectric conversion element are electrically connected via a first conductive adhesive layer, a current-collecting electrode, and a second conductive adhesive layer
Implementation Method 2
Solar cells are of interest as photoelectric conversion elements that convert light energy to electrical power
Data Source
AI summary
A photoelectric conversion element module (1) includes a plurality of photoelectric conversion elements (15) formed on a light-transmitting base plate (3). The photoelectric conversion elements (15) each include a transparent conductive film (4), a first charge transport layer (5), a power-generating layer (6), and a second charge transport layer (7) stacked in order from a side corresponding to the light-transmitting base plate (3). The second charge transport layer (7) is formed of a porous film that contains a carbon material. Among two of the photoelectric conversion elements (15) that are adjacent to each other, the second charge transport layer (7) of one photoelectric conversion element and the transparent conductive film (4) of the other photoelectric conversion element are electrically connected via a first conductive adhesive layer (9), a current-collecting electrode (11), and a second conductive adhesive layer (14).