研究目的
Addressing performance and cost constraints in silicon heterojunction cells with the HJT 2.0 concept.
研究成果
The HJT 2.0 concept with a bi-layer front electrode of ITO/SiN improves cell efficiency by 0.2-0.3% absolute and offers significant cost savings (30-40% in CoO). This approach addresses key performance and cost constraints in HJT cells, making it a viable option for mass production.
研究不足
The study focuses on the front electrode's impact on performance and cost, potentially overlooking other factors affecting HJT cell efficiency and cost. The sampling size and IV measurement accuracy may limit the statistical significance of observed differences.
1：Experimental Design and Method Selection:
The study involves the development of a bi-layer front electrode consisting of ITO and SiN for HJT cells to improve efficiency and reduce costs.
2：Sample Selection and Data Sources:
Standard n-type Cz wafers were used, with a sampling size of 600 cells comparing single layer ITO and bi-layer ITO/SiN front electrodes.
3：List of Experimental Equipment and Materials:
Equipment for depositing ITO and SiN layers, IV measurement tools under STC using GridTOUCH contacting.
4：Experimental Procedures and Operational Workflow:
Deposition of ITO and SiN layers, measurement of Jsc, Voc, and FF distributions, EQE measurements.
5：Data Analysis Methods:
Statistical analysis of Jsc, Voc, and FF distributions, comparison of efficiency gains and cost savings.
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