A method for manufacturing a solar cell

By using multi-mode, multi-wavelength ultraviolet cascade irradiation, the problem of unstable H passivation bonds in solar cells was solved, thereby improving the stability of the passivation layer and the cell efficiency. This method is applicable to N-type tunnel oxide passivated contact and back contact solar cells.

CN122373520APending Publication Date: 2026-07-10HENGDIAN GRP DMEGC MAGNETICS CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
HENGDIAN GRP DMEGC MAGNETICS CO LTD
Filing Date
2026-04-30
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In existing solar cells, the passivation film contains unstable structures such as free hydrogen and unstable H passivation bonds, which leads to decreased cell efficiency and light-induced degradation (LID). Single-wavelength ultraviolet light treatment cannot effectively cover unstable H passivation bonds with different bond energies, resulting in insufficient passivation effect.

Method used

The passivation layer is subjected to cascaded irradiation treatment using multi-mode, multi-wavelength ultraviolet light, including long-wavelength ultraviolet light and target ultraviolet light in three sub-bands. This gradually breaks, migrates, and reconstructs active hydrogen to form stable hydrogen passivation bonds, avoiding damage to stable bonds by high-energy bands.

Benefits of technology

It improves the passivation performance and stability of the passivation layer, enhances the photoelectric conversion efficiency and resistance to light-induced degradation of solar cells, and is suitable for mass production.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122373520A_ABST
    Figure CN122373520A_ABST
Patent Text Reader

Abstract

The present disclosure relates to the technical field of solar cells, and discloses a preparation method of a solar cell, comprising: performing cascade irradiation treatment on a first initial passivation layer on the surface of an initial solar cell structure by using multi-modal multi-wavelength ultraviolet light, so that the first initial passivation layer forms a first passivation layer; wherein the multi-modal multi-wavelength ultraviolet light is long-wave ultraviolet light; the multi-modal multi-wavelength ultraviolet light comprises at least three target ultraviolet lights in a first sub-band, a second sub-band and a third sub-band respectively; the cascade irradiation treatment comprises: sequentially performing irradiation treatment on the first initial passivation layer by using at least one target ultraviolet light in the first sub-band, at least one target ultraviolet light in the second sub-band and at least one target ultraviolet light in the third sub-band; the first sub-band is greater than the second sub-band, and the second sub-band is greater than the third sub-band. The present disclosure can improve the passivation effect of the first passivation layer, and improve the photoelectric conversion efficiency and the light-induced degradation resistance of the solar cell.
Need to check novelty before this filing date? Find Prior Art