Organic solar cell using nanocomposite of titania nanosheet and graphene

摘要

PURPOSE: An organic solar cell using a titania nanosheet and graphene is provided to improve solar energy conversion efficiency by smoothly transferring an electron generated in a photoactive layer to an electrode. CONSTITUTION: A bottom electrode layer is formed on a substrate. The bottom electrode layer is laminated grapheme. A titania nanosheet layer is formed on the bottom electrode layer. The thickness of the titania nanosheet layer is less than or equal to 1 nm. A photoactive layer is formed on the titania nanosheet layer. A top electrode layer is formed on the photoactive layer. A hole-transport layer is formed between the top electrode layer and the photoactive layer. The thickness of the hole-transport layer is 5 to 2000 nm. [Reference numerals] (AA) Top electrode; (BB) Buffer layer; (CC) Photoactive layer; (DD) Graphene; (EE) Titania nano-sheet; (FF) Plastic substrate; (GG) Light energy