Flexible monocrystalline thin silicon cell

摘要

A device, system, and method for solar cell construction and layer transfer are disclosed herein. An exemplary method of solar cell construction involves providing a silicon donor substrate. A porous layer is formed on the donor substrate. A first portion of a solar cell is constructed on the porous layer of the donor substrate. The solar cell and donor substrate are bonded to a flexible substrate. The flexible substrate and the first portion of a solar cell are then separated from the donor substrate at the porous layer. A second portion of a solar cell may then be constructed on the first portion of a solar cell providing a single completed solar cell.

主权项

1. A method of solar cell construction, the method comprising:
providing a silicon donor substrate; forming a porous layer on the silicon donor substrate; constructing a first portion of a solar cell on the porous layer of the silicon donor substrate wherein the action of constructing the first portion of the solar cell further comprises the actions of:
producing a n+ doped epitiaxial layer;producing a n− doped epitiaxial silicon film on the n+ doped epitiaxial silicon film;producing a passivation layer with openings on top of the n− doped epitiaxial silicon film;depositing aluminum on the passivation layer; andannealing to allow reaction of the aluminum with the n− doped epitiaxial silicon film via the openings; bonding the first portion of the solar cell to a flexible substrate; separating the flexible substrate and the first portion of the solar cell from the silicon donor substrate at the porous layer; and constructing a second portion of the solar cell on the first portion of the solar cell.