Chint New Energy Technology Co., Ltd.

Sheng He

Mingzhang Feng

Wei-Chih Hsu

Jinfang Yang

Some embodiments of the present disclosure provide an N-type TOPCon cell with double-sided aluminum paste electrodes, and a preparation method therefor. The front side of the cell is provided with a front-side silver main grid and a front-side aluminum fine grid, and the back side is provided with a back-side silver main grid and a back-side aluminum fine grid. The method for preparing the cell includes: texturing→B diffusion→BSG removal→alkali polishing→depositing a tunnel oxide layer and a polysilicon layer on a back side of a substrate by means of LPCVD→P diffusion on the back side→PSG removal→plating removal→deposition of an AlOpreparatory layer and a first SiNHpreparatory layer on the front side→deposition of a second preparatory layer SiNHon the back side→UV laser ablation on the front side of the substrate and the back side of the substrate→screen printing.

N-type TOPCon cell with double-sided aluminum paste electrodes, and preparation method for preparing N-type TOPCon cell with double-sided aluminum paste electrodes

Some embodiments of the present invention relate to a technical field of N-type TOPCon solar cells, and disclose a back-side metal electrode of an N-type TOPCon solar cell. The back-side metal electrode includes a substrate, a plurality of first silver fine grids disposed on a passivation film which is on a back side of the substrate, a plurality of second aluminum fine grids overlaid on the plurality of first silver fine grids, and a plurality of first silver main grids disposed perpendicular to the plurality of first silver fine grids. Each of the plurality of first silver main grids is a segmented structure. The back-side metal electrode further includes a plurality of second aluminum main grids, which are formed, in a printing manner, between any two adjacent grid segments of a plurality of grid segments and around each of the plurality of grid segments.

Back-side metal electrode of N-type TOPCon solar cell, and method for preparing back-side metal electrode of N-type TOPCon solar cell, and N-type TOPCon solar cell

Growing community of inventors

Zhejiang, China

Sheng He