研究目的
Investigating the damp-heat stability and efficiency improvement of industrial-size silicon heterojunction solar cells through the tailoring of hydrogen states in amorphous silicon and the implementation of double antireflection coatings.
研究成果
The research concludes that tailoring the Si-H bonding state in a-Si:H passivation layers and implementing double ARCs can significantly improve the efficiency and damp-heat stability of SHJ solar cells, making them a promising candidate for mass production.
研究不足
The study identifies the metastability of the a-Si:H/c-Si interface in damp-heat environments as a significant limitation. The high resistivity of porous a-Si:H with a wide band gap also poses a challenge for fill factor optimization.
1：Experimental Design and Method Selection:
The study combines experiments with molecular dynamics and ab initio calculations to understand the impact of Si-H bonding states on the optical band gap of amorphous silicon.
2：Sample Selection and Data Sources:
The research uses 6-inch bifacial rear-emitter SHJ solar cells with varying front a-Si:H passivation layers.
3：List of Experimental Equipment and Materials:
Equipment includes RF-PECVD for a-Si:H deposition, Sinton tester WCT-120 for minority carrier lifetime measurement, and various characterization tools like FTIR, SEM, and HR-TEM.
4：Experimental Procedures and Operational Workflow:
The process involves depositing a-Si:H layers with tailored Si-H bonding states, applying double ARCs of SiNx and SiOx, and conducting damp-heat stability tests.
5：Data Analysis Methods:
The analysis includes optical simulations, device simulations using AFORS-HET, and statistical analysis of PV parameters.
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