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Local Back Contact (LBC) crystalline silicon solar cell with novel antimony (Sb) Local Back Surface Field (LBSF) are reported. The Sb LBSF is formed at low temperature with a Laser Fired Contacts (LFC) process. To improve the solar cell parameters of Sb LBSF, the rear passivation layer with SiN x is optimized by varying the refractive index. The Si-rich SiN x with a refractive index...
This paper focuses on two main challenges: (i) to achieve a low surface recombination velocity and (ii) the quantitative control of the positive charges contained in the rear SiN x by varying the refractive index (n). We adopted a Si-rich SiN x film with a relatively thin thickness to control the fixed charge density (Q f ) from 2.74 × 10 12 to 1.63 × 10 12 ...
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