Photovoltaic Cell Texturing for Low-Reflectivity Marked Regions
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Solution Overview
Problem
Conventional photovoltaic cell production processes require marked regions for identification, which affect the reflectivity of incident light and reduce the photoelectric conversion efficiency due to damage on the substrate surface.
Innovation Solution
A photovoltaic cell design featuring a marked region with a first texture structure comprising recessed protrusion structures and pyramid structures, and a second texture structure outside the marked region with pyramid structures, to minimize light reflectivity and enhance light absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a marked region is formed on the surface of the substrate to track processing information, then the identification code region can be identified to obtain processing information, but the marked region affects reflectivity of incident light and damages the surface of the substrate, thereby reducing photoelectric conversion efficiency
Solution Approach 1:
The patent applies different texture structures to different regions: the first texture structure (with recessed top surfaces) is applied to the marked region to reduce light reflection and damage, while the second texture structure (pyramid structures) is applied to non-marked regions. This local differentiation allows the marked region to maintain both identification functionality and reduced light reflectivity.
Solution Approach 2:
The surface texture is segmented into two distinct types: the first texture structure consisting of protrusion structures with recessed top surfaces for the marked region, and the second texture structure consisting of pyramid structures for non-marked regions. This segmentation allows each region to be optimized for its specific function.
2Loss of information
If the marked region is formed to constitute an identification code region, then product information can be marked, but the marked region damages the surface of the substrate and reduces photoelectric conversion efficiency
Solution Approach 1:
The marked region is given a specialized local quality through the first texture structure with recessed top surfaces, which differs from the standard pyramid structures in non-marked regions. This local quality modification reduces surface damage and improves photoelectric conversion efficiency while maintaining marking capability.
3Loss of information
If conventional marking methods are used to track processing information, then identification can be achieved, but light reflectivity is affected and photoelectric conversion efficiency is reduced
Solution Approach 1:
The first texture structure with recessed top surfaces is specifically applied to the marked region to minimize light reflection and energy loss, while the second texture structure is applied elsewhere. This local quality differentiation ensures that the marking function does not compromise photoelectric conversion efficiency.
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 proposed design improves the photoelectric conversion efficiency of photovoltaic cells by reducing light reflectivity and increasing the absorption of incident light, while maintaining the ability to track processing information through the marked region.
Implementation Method 1
the first texture structure includes at least one first protrusion structure and at least one second protrusion structure, a respective first protrusion structure of the at least one first protrusion structure has a recessed top surface recessing toward a bottom surface of the respective first protrusion structure, and a respective second protrusion structure of the at least one second protrusion structure includes a pyramid structure
Implementation Method 2
the first texture structure includes at least one first protrusion structure and at least one second protrusion structure... a respective first protrusion structure... has a recessed top surface
Implementation Method 3
a second texture structure disposed on a part of the surface of the substrate outside the marked region, wherein the second texture structure includes at least one third protrusion structure, and a respective third protrusion structure of the at least one third protrusion structure includes a pyramid structure
Data Source
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AI summary
Embodiments of the present disclosure relate in general to photovoltaic technology, and more particularly to a photovoltaic cell, a method for forming the same, and a photovoltaic module. The photovoltaic cell includes a substrate; a marked region on a surface of the substrate, where the marked region is configured to mark product information of the photovoltaic cell; a first texture structure in the marked region on the surface of the substrate, where the first texture structure includes at least one first protrusion structure and at least one second protrusion structure, a respective first protrusion structure of the at least one first protrusion structure has a recessed top surface recessing toward a bottom surface of the respective first protrusion structure, and a respective second protrusion structure of the at least one second protrusion structure includes a pyramid structure; and a second texture structure disposed on a part of the surface of the substrate outside the marked region, where the second texture structure includes at least one third protrusion structure, and a respective third protrusion structure of the at least one third protrusion structure includes a pyramid structure. Embodiments of the present disclosure provide a photovoltaic cell, which is at least conducive to improving photoelectric conversion efficiency of the photovoltaic cell.