Patent ID: 6756289
Filing Date: 2004-06-29
Classification: C30B,H01L,Y02E,Y02P,Y10S

Abstract:
A method of producing a solar cell comprising the steps of:forming a porous layer in a surface region of a first substrate; forming a first semiconductor layer on the porous layer by liquid phase epitaxy under a reducing atmosphere; forming a second semiconductor layer on the first semiconductor layer by liquid phase epitaxy; bonding the first substrate to a second substrate to obtain a multiple layer structure with the second semiconductor layer positioned inside; and separating the first substrate from the multiple layer structure by utilizing the porous layer to transfer the first and second semiconductor layers to the second substrate; wherein in the liquid phase epitaxy used to form the first semiconductor layer, a melting solution in which elements for forming the first semiconductor layer are dissolved up to a desired concentration, which is the same as or below saturated concentration, is brought into contact with a surface of the porous layer which is annealed under a reducing atmosphere in advance, while a surface temperature of the porous layer is made lower than a temperature at which elements in the melting solution having the desired concentration are saturated by at least 5 degrees Celsius.