Metallisation and Interconnection of e-Beam Evaporated Polycrystalline Silicon Thin-Film Solar Cells on Glass

Table 1

Area and types of power loss with formulas.

Area and types of power loss	Fractional power loss
Resistance loss in emitter layer	𝐽𝑑^2𝜌𝑠,em/𝐽MP𝑉MP3𝐵𝐸𝐶𝑆𝐸𝐵𝐸+𝑊𝐴𝐸^2(𝑆𝐸−𝑊𝐸)^3
Resistance loss in BSF layer	𝐽𝑑^2𝜌𝑠,BSF/𝐽MP𝑉MP3𝐵𝐵𝐶𝑆𝐵𝐵𝐵+𝑊AB^2(𝑆𝐵−𝑊FB)^3
Resistance loss in emitter finger	𝐽𝑑^2𝐵𝐸𝜌𝑠,Al/𝐽MP𝑉MP𝑊𝐸𝐶𝑆𝐸(1/3)𝐵𝐸^2(𝑆𝐸−𝑊𝐸)^2+𝑆𝐸^2𝑊^2𝐴𝐸
Resistance loss in BSF finger	𝐽𝑑^2𝐵𝐵𝜌𝑠,Al/𝐽MP𝑉MP𝑊FB𝐶𝑆𝐵(1/3)𝐵𝐵^2(𝑆𝐵−𝑊FB)^2+𝑆𝐵^2𝑊AB^2
Resistance loss in busbar	𝐽𝑑^2𝐴^2𝜌𝑠,Al/𝐽MP𝑉MP3𝐶𝑊𝐸𝑊^2𝐴𝐸+𝐵𝐸^2𝑆𝐸/𝑆𝐸+𝑊𝐸^2
Shading loss (removal of absorber layer) by the emitter groove	𝐵𝐸𝑊𝐹𝐸/𝑆𝐸𝐶−𝑊𝐵
Shading loss by busbar	𝑊𝐵/𝐶
Contact resistance loss between emitter layer and finger	𝑝𝑐^∗𝐽MP/𝑉MP𝑆𝐸/𝑊𝐸
Contact resistance loss between BSF layer and finger	𝑝𝑐^∗𝐽MP/𝑉MP𝑆𝐵/𝑊FB