Hybrid heterojunction photovoltaic device

Abstract

A photovoltaic device includes an inorganic substrate having a surface; an organic monolayer disposed onto the surface of the inorganic substrate, the inorganic monolayer having the following formula: ˜X—Y, wherein X is an oxygen or a sulfur; Y is an alkyl chain, an alkenyl chain, or an alkynyl chain; and X covalently bonds to the surface of the inorganic substrate by a covalent bond; a doped organic material layer disposed onto the organic monolayer; and a conductive electrode disposed onto a portion of the doped organic material.

1 . A photovoltaic device, comprising:
 an inorganic substrate having a surface;   an organic monolayer disposed onto the surface of the inorganic substrate, the inorganic monolayer having the following formula:
   ˜X—Y,
 
   wherein X is an oxygen or a sulfur; Y is an alkyl chain, an alkenyl chain, or an alkynyl chain; and X covalently bonds to the surface of the inorganic substrate by a covalent bond;   a doped organic material layer disposed onto the organic monolayer; and   a conductive electrode disposed onto a portion of the doped organic material.   
     
     
         2 . The photovoltaic device of  claim 1 , wherein the doped organic material comprises pentacene, rubrene, or a combination thereof. 
     
     
         3 . The photovoltaic device of  claim 1 , wherein the inorganic substrate comprises silicon. 
     
     
         4 . The photovoltaic device of  claim 1 , wherein the inorganic substrate further comprises a p-type dopant or an n-type dopant. 
     
     
         5 . The photovoltaic device of  claim 1 , wherein Y has about 4 to about 21 carbons. 
     
     
         6 . The photovoltaic device of  claim 1 , wherein the doped organic material layer comprises an antimony compound. 
     
     
         7 . A photovoltaic device, comprising:
 an inorganic substrate having a surface;   an organic monolayer disposed onto the surface of the inorganic substrate, the inorganic monolayer having the following formula:
   ˜X—Y—Z,
 
   wherein X is an oxygen or a sulfur; Y is an alkyl chain, an alkenyl chain, or an alkynyl chain; Z is a methyl group or an epoxy group; and X covalently bonds to the surface of the inorganic substrate by a covalent bond;   a doped organic material layer disposed onto the organic monolayer; and   a conductive electrode disposed onto a portion of the doped organic material.   
     
     
         8 . The photovoltaic device of  claim 7 , wherein the doped organic material layer comprises trialkyloxonium hexachlroantimonate, antimony pentachloride, or a combination thereof. 
     
     
         9 . The photovoltaic device of  claim 7 , wherein the inorganic substrate comprises an n-type dopant, and the doped organic material layer comprises a p-type dopant. 
     
     
         10 . The photovoltaic device of  claim 7 , wherein the inorganic substrate comprises an n-type dopant, and the doped organic material layer comprises an n-type dopant. 
     
     
         11 . The photovoltaic device of  claim 7 , wherein the inorganic substrate comprises a p-type dopant, and the doped organic material layer comprises an n-type dopant. 
     
     
         12 . The photovoltaic device of  claim 7 , further comprising a transparent conductive layer (TCL) disposed between the doped organic material layer and the conductive electrode. 
     
     
         13 .- 20 . (canceled)