INTEGRATION OF EPITAXIAL LIFT-OFF SOLAR CELLS WITH MINI-PARABOLIC CONCENTRATOR ARRAYS VIA PRINTING METHOD

摘要

There is disclosed a method of preparing a photovoltaic device. In particular, the method comprises integrating epitaxial lift-off solar cells with mini-parabolic concentrator arrays via a printing method. Thus, there is disclosed a method comprising providing a growth substrate; depositing at least one protection layer on the growth substrate; depositing at least one sacrificial layer on the protection layer; depositing at least one photoactive cell on the sacrificial layer; etching a pattern of at least two parallel trenches that extend from the at least one photoactive cell to the sacrificial layer; depositing a metal on the at least one photoactive cell; bonding said metal to a host substrate; and removing the sacrificial layer with one or more etch steps. The host substrate can be a siloxane, which when rolled, can form a stamp used to integrate solar cells into concentrator arrays. There are also disclosed a method of making a growth substrate and the growth substrate made therefrom.

主权项

1. A non-destructive method for performing an epitaxial lift-off, comprising:
providing a growth substrate; depositing at least one protection layer on the growth substrate; depositing at least one sacrificial layer on the protection layer; depositing a photoactive cell on the sacrificial layer; depositing a metal mask on the at least one photoactive cell; performing a first etch step through said metal mask to form a pattern in the photoactive cell, wherein said pattern extends to the sacrificial layer; and removing the sacrificial layer with one or more second etch steps.