Photodetectors and photovoltaics based on semiconductor nanocrystals

Abstract

A composite material is described. The composite material comprises semiconductor nanocrystals, and organic molecules that passivate the surfaces of the semiconductor nanocrystals. One or more properties of the organic molecules facilitate the transfer of charge between the semiconductor nanocrystals. A semiconductor material is described that comprises p-type semiconductor material including semiconductor nanocrystals. At least one property of the semiconductor material results in a mobility of electrons in the semiconductor material being greater than or equal to a mobility of holes. A semiconductor material is described that comprises n-type semiconductor material including semiconductor nanocrystals. At least one property of the semiconductor material results in a mobility of holes in the semiconductor material being greater than or equal to a mobility of electrons.

What is claimed is: 
     
         1 . A composite material comprising:
 semiconductor nanocrystals; and   organic molecules that passivate the surfaces of the semiconductor nanocrystals, at least one property of the organic molecules is to facilitate a transfer of charge between the semiconductor nanocrystals, each of the organic molecules comprising a benzene ring.