3) Design a process flow for an Al-BSF silicon solar cell starting from the selection of the raw material until the fina

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3 Design A Process Flow For An Al Bsf Silicon Solar Cell Starting From The Selection Of The Raw Material Until The Fina 1 (143.88 KiB) Viewed 44 times

3) Design a process flow for an Al-BSF silicon solar cell starting from the selection of the raw material until the final device (i.e., solar cell). Draw cross-sectional schematic figures for every relevant process step. Instead of describing all possible options (e.g. metal contacts can be fabricated by evaporation, sputtering, screen printing, electroplating, etc.), select one process for every step and justify your selection. Give as much process details (e.g. which process, which material, what process temperature, other process parameters, etc.) as possible and eplain why. In your process details, answer the questions below. Short answers for each question are sufficient. a. Selection of the raw material (CZ-S, FZ-Si, mc-Si). Why? b. How is the silicon crystal/ingot fabricated and how is it cut in wafers? c. How are the wafer surfaces treated and why? d. How is the p-n junction formed? What method did you use for doping? What are the advantages of that method? e. Are there any thin films needed in the cell structure? At which stage of the process are they possibly deposited? Method and process details?