公开(公告)号：US20240372016A1

公开(公告)日：2024-11-07

申请号：US18773281

申请日：2024-07-15

Applicant: Maxeon Solar Pte. Ltd.

Inventor： STAFFAN WESTERBERG ,  SEUNG BUM RIM

IPC: H01L31/0216 ,  H01L31/0224 ,  H01L31/0236 ,  H01L31/028 ,  H01L31/0288 ,  H01L31/0368 ,  H01L31/0376 ,  H01L31/068 ,  H01L31/18 ,  H01L31/20

Abstract: Methods of fabricating solar cell emitter regions with differentiated P-type and N-type architectures and incorporating a multi-purpose passivation and contact layer, and resulting solar cells, are described. In an example, a solar cell includes a substrate having a light-receiving surface and a back surface. A P-type emitter region is disposed on the back surface of the substrate. An N-type emitter region is disposed in a trench formed in the back surface of the substrate. An N-type passivation layer is disposed on the N-type emitter region. A first conductive contact structure is electrically connected to the P-type emitter region. A second conductive contact structure is electrically connected to the N-type emitter region and is in direct contact with the N-type passivation layer.