Sulfide Nanocrystal Inks for Dense Cu(In1−xGax)(S1−ySey)2 Absorber Films and Their Photovoltaic Performance

摘要: Recent developments in the colloidal synthesis of high quality nanocrystals have opened up new routes for fabrication low-cost efficient photovoltaic devices. Previously, we demonstrated utility CuInSe2 thin film solar cells. In those devices, sintering nanocrystal yields a relatively dense with some void space inclusions. Here, present general approach toward eliminating sintered films by utilizing reactions that yield controlled volume expansion film. This is first synthesizing ink composed Cu(In1−xGax)S2 (CIGS). After formation, are exposed to selenium vapor during which most sulfur replaced selenium. Full replacement produces ∼14.6% and reproducibly leads good device-quality CIGSSe absorber reduced inclusion space. Solar cells made using fi...