Hybrid Solar Cell Layer Structure for Lower Optical Loss
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Solution Overview
Problem
Existing solar batteries face challenges in optimizing conversion efficiency due to the limitations of individual crystalline silicon structure batteries, necessitating a hybrid approach that combines different battery types while redesigning film layers for improved performance.
Innovation Solution
A hybrid solar battery design featuring a silicon substrate with a tunneling layer, intrinsic amorphous silicon layer, and doped layers, optimized with thin film structures to reduce parasitic absorption and manufacturing costs, and a photovoltaic module comprising connected hybrid solar batteries for enhanced efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If individual crystalline silicon structure batteries are used, then manufacturing simplicity is maintained, but conversion efficiency cannot be optimized
Solution Approach 1:
The patent combines crystalline silicon battery and amorphous silicon battery into a hybrid structure, where the crystalline silicon substrate provides the base structure and the amorphous silicon layer enhances light absorption and conversion efficiency, thereby optimizing efficiency while maintaining manufacturing feasibility
Solution Approach 2:
The patent uses composite material structure by integrating crystalline silicon and amorphous silicon layers with different properties, where crystalline silicon provides structural stability and amorphous silicon enhances optical absorption, achieving improved conversion efficiency through material composition
2Productivity
If different types of batteries are combined, then conversion efficiency is optimized, but structure redesign complexity increases
Solution Approach 1:
The patent divides the battery structure into distinct functional layers: tunneling layer, intrinsic amorphous silicon layer, and doped amorphous silicon layer, with each layer having specific thickness ranges and functions, allowing systematic optimization while managing complexity through modular design
Solution Approach 2:
The patent optimizes conversion efficiency by precisely controlling parameters such as tunneling layer thickness (not more than 3 nanometers), intrinsic amorphous silicon layer thickness (3-15 nanometers), and doped layer thickness (20-600 nanometers), demonstrating parameter-driven design to balance performance and complexity
3Productivity
If film layers are optimized, then conversion efficiency improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs thin film structures with controlled thicknesses (tunneling layer ≤3nm, intrinsic amorphous silicon layer 3-15nm, doped layer 20-600nm) to reduce parasitic absorption while maintaining manufacturing feasibility through established thin film deposition techniques
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 hybrid solar battery design improves conversion efficiency by minimizing optical loss and reducing production costs, achieving better spectral response and battery performance through the combination of different battery types and optimized layer structures.
Implementation Method 1
a tunneling layer located between the silicon substrate and the first surface
Implementation Method 2
an intrinsic amorphous silicon layer located between the silicon substrate and the second surface
Data Source
AI summary
The present disclosure provides a hybrid solar battery, composing of: a first surface and a second surface opposing to each other, and the hybrid solar battery is further composed of a silicon substrate; a tunneling layer located between the silicon substrate and the first surface; and an intrinsic amorphous silicon layer is located between the silicon substrate and the second surface. The hybrid solar battery and photovoltaic module proposed in this disclosure can reduce the parasitic absorption of the film layer the production cost on the basis of improving the conversion efficiency of the battery.