Solar cell and preparation method thereof

• Main Authors: LYU JIALI, PENG GAOPAN, XU YUANFEI, GUO SHICHENG, ZHANG MINGMING, MAO YU, FU SHAOJIAN, FAN XUN
• Format: Patent
• Language: Chinese; English
• Published: 22.12.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

The invention discloses a solar cell and a preparation method thereof, the solar cell comprises a P-type boron diffusion layer, a PN junction layer, an N-type silicon-based layer, a tunneling layer and an electron aggregation layer which are stacked in sequence, the N-type silicon-based layer is provided with a first concave part, an area, opposite to the first concave part, of the PN junction layer is provided with a first convex part and a second concave part, and the second concave part is provided with a second convex part. The first convex part and the second concave part are located on the two opposite sides of the PN junction layer, the first convex part is located in the first concave part, the area, opposite to the second concave part, of the P-type boron diffusion layer is provided with a second convex part and a third concave part, and the second convex part and the third concave part are located on the two opposite sides of the P-type boron diffusion layer; the second convex part is positioned in