source:other news
release time:2023-02-22
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Hit is the abbreviation of Heterojunction with Intrinsic Thin-laye, which means that this symbol is heterogeneous .hit solar cells are P/I-SI membranes (5 ~ 10nm of membrane thickness) and I/on the back side of the light. N-type A-SI film (5 ~ 10nm film thickness) pinch the single crystal Si tablet .hit battery is a heterogeneous knot battery invented by Sanyo in Japan. A layer of ingenuity is added between the doped layer and the substrate. HIT battery development history> In 1968, the first A-Si/C-Si heterogeneous knot device. > In 1974, the first hydrogenated non -crystalline silicon device. (A-SI: H, H passivation, reduced defects)> In 1983, the first solar cell. > In 2010, the conversion efficiency reached 23%.
The battery substrate is mainly silicon -based plates; a silicon nanomi film depressed on the Energy Band Gap on the silicon base plate. The surface layer is seized with a transparent conductive film, and the back surface has a back surface electrical field. By optimizing the surface bracket of the silicon, the optical absorption loss of the transparent conductive oxidation layer (TCO) and the A-SI layer can be reduced. HIT batteries inhibit the light absorption rate of P-type and I A-SI, and enhance the light absorption rate of N-type C-SI. The advantage of HIT battery technology is that the HIT solar cell uses A-SI to form a PN knot, so the entire process can be completed at low temperature below 200 ° C. Compared with the original heat diffusion crystalline solar cell temperature (~ 900 ° C), it greatly reduces the temperature of the manufacturing process. Due to the characteristics of this symmetrical structure and low temperature process, the deformation and thermal damage of the Si chip produced during the formation of heat or membrane is reduced, which is beneficial to the thinning and efficiency of the chip. Efficiency (the level of research room is 23%, and the level of mass production is 20%), even at high temperatures, the conversion efficiency is rarely reduced, and double -sided units are used to increase power generation.
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