Photovoltaic Cell Texture Layout for Low-Reflectivity Marking

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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 damage the substrate surface, thereby reducing photoelectric conversion efficiency.

Innovation Solution

A photovoltaic cell design featuring a substrate with a marked region and a non-marked region, where the marked region includes a first texture structure with recessed protrusions and pyramid structures, and the non-marked region includes a second texture structure with pyramid protrusions, to minimize light reflectivity and enhance light absorption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If a marked region is formed on the surface of the substrate for identification, then product information tracking is enabled, but light reflectivity is affected and photoelectric conversion efficiency is reduced

Engineering Contradiction:

Improveprocessing information trackingVSAvoidphotoelectric conversion efficiency

Core Design Contradiction:

Loss of informationVSLoss of energy

Solution Approach 1:

The patent applies different texture structures to different regions of the substrate surface. The marked region receives a first texture structure with recessed top surfaces, while the non-marked region receives a second texture structure with standard pyramid protrusions. This local differentiation allows the marked region to maintain identification functionality while minimizing its impact on light absorption, as the recessed structure reduces the area affecting light capture.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The substrate surface is segmented into distinct marked and non-marked regions, each receiving tailored texture structures. The marked region is further divided into multiple recessed protrusion structures arranged in specific patterns. This segmentation allows the identification function to be isolated to specific zones, preserving the photoelectric conversion efficiency of the majority of the surface.

Inventive Principle:

Principle #1Segmentation

2Loss of information

If a marked region is formed on the substrate surface, then identification code functionality is achieved, but the surface of the substrate is damaged

Engineering Contradiction:

Improveidentification code functionalityVSAvoidsubstrate surface integrity

Core Design Contradiction:

Loss of informationVSStrength

Solution Approach 1:

The patent changes the geometric parameters of the texture structures in the marked region compared to conventional designs. The first protrusion structures have recessed top surfaces with specific depth ratios (minimum distance to maximum distance not greater than 85%), creating a modified pyramid structure that maintains mechanical strength while enabling identification functionality. This parameter optimization reduces surface damage while preserving structural integrity.

Inventive Principle:

Principle #35Parameter changes

3Loss of energy

If a first texture structure with recessed protrusions is formed in the marked region, then light absorption is improved, but the complexity of the manufacturing process increases

Engineering Contradiction:

Improvelight absorption efficiencyVSAvoidtexture structure complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The marked region is prepared in advance by forming the first texture structure with recessed protrusions before the final cell assembly. The recessed top surfaces are pre-formed with controlled depth ratios, allowing subsequent processing steps to proceed without additional complex operations. This preliminary structuring simplifies the overall manufacturing workflow while achieving improved light absorption.

Inventive Principle:

Principle #10Preliminary action

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 light absorption and reduces reflectivity, leading to increased photoelectric conversion efficiency of the photovoltaic cell while maintaining the ability to track processing information through the marked region.

Implementation Method 1

improves light absorption and reduces reflectivity

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Implementation Method 2

affects reflectivity of incident light on the surface of the substrate

Methodology Applied

Scientific EffectLight reflectivity reduction: Reflection

Implementation Method 3

Photovoltaic cells are semiconductor devices that convert solar energy to electrical energy

Methodology Applied

Scientific EffectPhotovoltaic effect: Photovoltaic Effect

Data Source

PatentUS20250081631A1Photovoltaic cell, method for forming same, and photovoltaic module

Publication Date: 2025.03.06 JINKO SOLAR (HAINING) CO LTS

AI summary

A photovoltaic cell is provided, including a substrate having a surface with a marked region configured to mark product information of the photovoltaic cell and a non-marked region; a first texture structure in the marked region, including at least one first protrusion structure and at least one second protrusion structure, a respective first protrusion structure includes a truncated pyramid having a recessed top surface recessing toward a bottom surface of the respective first protrusion structure, and a respective second protrusion structure includes a pyramid structure; and a second texture structure disposed in the non-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.