Novel carbon nano-structures for energy generation applications

Abstract

This relates to a device for detecting or converting light or heat energy, the device comprising: a Graphene sheet formed into a scroll such as to provide a monolayer structure in which the radius of curvature of the graphene sheet increases on increasing distance from the longitudinal axis of the scroll.

1 . A bulk heterojunction organic solar ink comprising scrolls and an electron acceptor, wherein each scroll comprises a graphene sheet formed into the scroll such as to provide a structure in which the radius of curvature of the graphene sheet increases on increasing distance from the longitudinal axis of the scroll. 
     
     
         2 . The bulk heterojunction organic solar ink according to  claim 1 , wherein each scroll substantially consists of the graphene sheet. 
     
     
         3 . The bulk heterojunction organic solar ink according to  claim 1 , wherein each scroll has an inner diameter of less than or equal to 5 nm. 
     
     
         4 . The bulk heterojunction organic solar ink according to  claim 3 , wherein each scroll has an inner diameter of 0.3 to 0.5 nm. 
     
     
         5 . The bulk heterojunction organic solar ink according to  claim 1 , wherein each scroll has an outer diameter of less than or equal to 5 nm. 
     
     
         6 . The bulk heterojunction organic solar ink according to  claim 1 , wherein each scroll has a single layer. 
     
     
         7 . The bulk heterojunction organic solar ink according to  claim 1 , wherein each scroll has multiple layers. 
     
     
         8 . The bulk heterojunction organic solar ink according to  claim 7 , wherein the multiple layers in each scroll each have an edge, and the edges of the multiple layers are aligned between the multiple layers. 
     
     
         9 . The bulk heterojunction organic solar ink according to  claim 1 , wherein the graphene sheet is diagonally rolled at a chirality. 
     
     
         10 . The bulk heterojunction organic solar ink according to  claim 1 , wherein the Graphene used for the preparation of the scroll is free from contamination and defects. 
     
     
         11 . The bulk heterojunction organic solar ink according to  claim 1 , wherein graphene platelets used in preparation of the scroll have a length which is at least 25 nm 
     
     
         12 . The bulk heterojunction organic solar ink according to  claim 1 , wherein the electron acceptor is a mix of PCBM and polymers.