Fullerene patent on photovoltaic cell on November 2, 2004

Fullerene patents continue. On November 2, 2004, we have US 6,812,399, the first claim of which is

A photovoltaic cell, comprising:

a first electrode;

a second electrode;

a first layer between the first and second electrodes, the first layer comprising:

a first polymer, the first polymer being conjugated; and

a fullerene component; and

a second layer between the first electrode and the first layer, the second layer comprising doped poly(3-alkylthiophene).


[As of Nov. 2, 2004, a search of the PTO database reveals 792 patents with the word --fullerene-- and 823 patents with --fullerene or buckyball--.]