Patterned Dopant Layer Solar Cell Manufacturing
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Solution Overview
Problem
Current solar cell manufacturing methods face challenges in achieving high efficiency due to low efficiency issues in solar cell production, necessitating improved processes for maximizing solar cell performance.
Innovation Solution
A method involving conductive region formation by creating first- and second-conduction-type regions on a semiconductor substrate through dopant layer formation and heat treatment, and electrode formation by connecting these regions with passivation and anti-reflective films to enhance electrical characteristics and light absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional solar cell manufacturing methods are used, then the manufacturing process is simple, but the solar cell efficiency is low
Solution Approach 1:
The patent divides the semiconductor substrate into multiple regions with different conductivity types (first-conduction-type region and second-conduction-type region) through selective dopant layer formation and ion implantation. This segmentation creates distinct functional zones that improve charge carrier separation and collection, thereby enhancing solar cell efficiency without requiring complex multi-step processing
Solution Approach 2:
The patent applies different doping methods to different surfaces of the semiconductor substrate: thermal diffusion with dopant layers on the first surface and ion implantation on the second surface. This local quality approach optimizes dopant distribution and electrical characteristics in each region, improving overall device performance while maintaining a relatively simple manufacturing process
2Reliability
If dopant layers are formed and heat-treated to create conductive regions, then electrical characteristics improve, but manufacturing complexity increases
Solution Approach 1:
The patent combines multiple dopant introduction methods (thermal diffusion and ion implantation) into a single manufacturing flow, where dopant layers are formed on one surface while the opposite surface undergoes ion implantation. This merging of techniques in a unified process achieves superior electrical characteristics without requiring separate manufacturing lines or complex coordination
Solution Approach 2:
The patent performs preliminary dopant layer formation and heat treatment to create conductive regions before final electrode fabrication. This preliminary action ensures that the semiconductor substrate has optimized electrical properties in advance, simplifying subsequent processing steps and improving overall manufacturing 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
This approach enhances the efficiency of solar cells by improving electrical characteristics and light absorption, leading to increased open-circuit voltage, short-circuit current, and overall solar cell performance.
Implementation Method 1
heat-treating the dopant layer
Implementation Method 2
forming a dopant layer containing a first-conduction-type dopant over the one surface of the semiconductor substrate, and heat-treating the dopant layer
Implementation Method 3
the second-conduction-type region is formed by ion-implanting a second-conduction-type dopant into the semiconductor substrate
Data Source
AI summary
A method for manufacturing a solar cell is disclosed. The disclosed method includes conductive region formation of forming a first-conduction-type region at one surface of a semiconductor substrate and a second-conduction-type region at another surface of the semiconductor substrate, and electrode formation of forming a first electrode connected to the first-conduction-type region and a second electrode connected to the second-conduction-type region. In the conductive region formation, the first-conduction-type region is formed by forming a dopant layer containing a first-conduction-type dopant over the one surface of the semiconductor substrate, and heat-treating the dopant layer, and the second-conduction-type region is formed by ion-implanting a second-conduction-type dopant into the semiconductor substrate at the another surface of the semiconductor substrate.