Solar cell
一种太阳能电池、电极的技术,应用在太阳能电池领域,能够解决复合损失隐患等问题,达到保持选择性传输、增强能带弯曲效果、提高稳定性的效果
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[0076] Figure 5 to Figure 8 It is a schematic structural diagram corresponding to each step of the preparation method of a solar cell provided in another embodiment of the present invention. refer to Figure 5 to Figure 8 , the preparation method of the solar cell comprises the following steps:
[0077] refer to Figure 5 , a substrate 30 is provided, and a tunneling film 321 a is formed on the back surface of the substrate 30 .
[0078] In this embodiment, the substrate 30 is an N-type silicon wafer, the substrate 30 includes a first region 30a and a second region 30b, and the second electrode formed subsequently is located in the first region 30a; Diffusion of P-type dopant ions is performed on the front surface to form the emitter electrode 311 , and the dopant ions include boron ions.
[0079] After diffusion, the backside and edges of the substrate need to be etched to remove excess PN junctions, but the borosilicate glass formed by doped ion diffusion on the front s...
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