Composite Tunneling Structure in Laminated Solar Cells
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Solution Overview
Problem
The efficiency of laminated solar cells is hindered by high resistance and carrier recombination in the tunneling structure, leading to reduced stability and performance.
Innovation Solution
A laminated solar cell design incorporating a metal-doped metallic oxide as the main body material layer and an N-type or P-type semiconductor material as the auxiliary material layer in the tunneling structure, reducing resistance and carrier loss, and improving the fill factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional tunneling structure is used in the laminated solar cell, then the device complexity is reduced, but the resistance increases and carrier recombination occurs, leading to reduced efficiency
Solution Approach 1:
The patent applies composite materials by combining metal-doped metallic oxide (main body material layer) with N-type or P-type semiconductor material (auxiliary material layer) to form a tunneling structure. This composite structure reduces resistance and carrier recombination compared to conventional single-material tunneling structures, thereby improving efficiency while maintaining reasonable device complexity.
Solution Approach 2:
The patent implements local quality by creating distinct layers with different material properties within the tunneling structure. The main body material layer (metal-doped metallic oxide) provides one set of electrical properties, while the auxiliary material layer (semiconductor material) provides complementary properties, allowing each layer to optimize specific functions for reduced resistance and carrier loss.
2Ease of manufacture
If the tunneling structure uses simple material composition, then the ease of manufacture is improved, but the resistance is high and fill factor is reduced
Solution Approach 1:
The composite tunneling structure combines metal-doped metallic oxide with semiconductor material, where each component can be deposited using standard thin-film techniques. The layered composite approach allows sequential deposition processes that are manageable with existing manufacturing equipment, while achieving improved fill factor through reduced resistance and carrier recombination.
3Reliability
If the tunneling structure uses metal-doped metallic oxide and semiconductor material layers, then the resistance is reduced and efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent uses composite materials to achieve improved efficiency through reduced resistance and carrier recombination. The metal-doped metallic oxide provides excellent electrical conductivity, while the semiconductor material layer provides complementary electronic properties, together creating a tunneling structure that outperforms conventional single-material designs despite the increased structural complexity.
Solution Approach 2:
The auxiliary material layer (semiconductor material) acts as an intermediary between the main body material layer and the carrier transport layers. This intermediate layer facilitates carrier transport and reduces recombination, serving as a mediator that improves overall device efficiency while managing the complexity of the multi-layer structure.
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
Enhances the efficiency and stability of the laminated solar cell by minimizing internal resistance and carrier recombination, thereby increasing current density and fill factor.
Implementation Method 1
The main body material layer includes a metal-doped metallic oxide... By providing the main body material layer, the resistance between the tunneling structure and the first sub-cell or the second sub-cell can be reduced
Implementation Method 2
The auxiliary material layer includes an N-type semiconductor material or a P-type semiconductor material... By providing the auxiliary material layer, it is beneficial to reducing the recombination of carriers between the tunneling structure and the first sub-cell or the second sub-cell
Implementation Method 3
The first light absorption layer and the second light absorption layer can generate an electron-hole pair under the irradiation of sunlight
Data Source
Figure 1~2
Figure 3
AI summary
Disclosed are a laminated solar cell and a preparation method therefor, and an electrical apparatus, which belong to the technical field of solar cells. The laminated solar cell includes: a first sub-cell, a tunneling structure and a second sub-cell which are sequentially arranged in a first direction, wherein the first direction is an incident direction of sunlight; the first sub-cell includes a first carrier transport layer, a first light absorption layer and a second carrier transport layer which are sequentially arranged in the first direction; the second sub-cell includes a third carrier transport layer, a second light absorption layer and a fourth carrier transport layer which are sequentially arranged in the first direction; and the tunneling structure includes a main body material layer and an auxiliary material layer, the main body material layer includes a metal-doped metallic oxide, the auxiliary material layer includes an N-type semiconductor material or a P-type semiconductor material, the auxiliary material layer is located between the main body material layer and the third carrier transport layer, and the main body material layer is located between the second carrier transport layer and the auxiliary material layer, thereby being beneficial to improving the efficiency and stability of the laminated solar cell.