Back-contact photovoltaic cell comprising a thin lamina having a superstrate receiver element

摘要

A method to fabricate a photovoltaic device includes forming first and second contact regions at the first surface of a semiconductor donor body. A cleave plane may be formed by implanting ions into the donor body, and a lamina that includes the contact regions is cleaved from the donor body at the cleave plane. The first surface of the lamina may be contacted with a temporary support and fabricated into a photovoltaic device, wherein the lamina comprises the base of the photovoltaic device.

主权项

1. A method to fabricate a photovoltaic device, the method comprising the steps of:
a) providing a semiconductor donor body doped with a first conductivity type, the semiconductor donor body comprising a first dopant concentration and a first surface; b) forming a first contact region at the first surface and within the semiconductor donor body, wherein the first contact region has the first conductivity type at a second dopant concentration, the second dopant concentration being higher than the first dopant concentration; c) forming a second contact region at the first surface and within the semiconductor donor body, wherein the second contact region is doped with a second conductivity type; d) implanting ions into a depth from the first surface of the semiconductor donor body to define a cleave plane, after the steps of forming the first contact region and forming the second contact region; e) cleaving a lamina from the donor body at the cleave plane, wherein the step of cleaving the lamina forms a second surface on the lamina opposite the first surface, and wherein the lamina comprises the first and second contact regions; f) contacting the first surface of the lamina to a temporary support; and g) fabricating a photovoltaic device, wherein the lamina comprises a base of the photovoltaic device.