Provided is an integrated 
amorphous silicon double-junction 
solar cell curtain wall, comprising a plurality of photovoltaic 
curtain wall plates, each of which being encapsulated by a double-junction 
amorphous silicon solar cell chip with a glass substrate, a glass plate, a glue film, a 
junction box, a lead and a frame; and an 
electric control unit having a controller; wherein an output of the photovoltaic 
curtain wall plate is connected to the controller of the 
electric control unit. A double-junction double-layer 
solar cell top 
cell film layer and a bottom 
cell film layer are disposed on a glass substrate of the 
cell chip, each of the top cell film layer and the bottom cell film layer comprising a P-layer, an I-layer, and an N-layer; an I-layer of the top cell film layer is 
amorphous silicon; and an I-layer of the bottom cell film layer is amorphous 
silicon or 
amorphous germanium-
silicon. The invention solves problems of 
solar power generation and application, and features with good energy saving effect, safety, reliability and wide applications. Generated energy of the 
cell chip per 
square meter is 30-60 W, 
photoelectric conversion efficiency is 5-7%, an attenuation rate is 20-30%, output efficiency after conversion is approximately 80%. The invention is 
usable for 
solar power generation and wall decoration of buildings.