Patent ID: 8252621
Filing Date: 2012-08-28
Classification: H01L,Y02E

Abstract:
1. A process of forming a Group IBIIIAVIA solar cell absorber on a base, comprising: forming a film on the base, wherein the film is substantially metallic and comprises Cu and In; forming a separator layer over the film, wherein the separator layer substantially comprises a Group VIA material; forming a source layer over the separator layer, wherein the source layer substantially comprises Ga and it is substantially metallic; forming a cap layer over the source layer, wherein the cap layer substantially comprises Se; and reacting the film, the separator layer, the source layer and the cap layer with each other at a reaction temperature to form the Group IBIIIAVIA absorber layer, the absorber layer including a surface region of less than or equal to 300 nm thickness, wherein the Ga/(Ga+In) molar ratio within the surface region is in the range of 0.1-0.3.