Patent ID: 8519258
Filing Date: 2013-08-27
Classification: B82Y,H01L,Y02E,Y10S,Y10T

Abstract:
1. A system comprising: a first electrode and a second electrode; a plurality of organic photovoltaic cells arranged in a stack disposed between the first electrode and the second electrode, each organic photovoltaic cell comprising at least two organic semiconductor materials that form a donor-acceptor heterojunction at their interface, a first cell and a second cell of the plurality of organic photovoltaic cells having different absorption characteristics; metal or metal substitute having a thickness of ranging from 1000 Å to 4000 Å disposed in the stack between each of the cells; and a resistive load electrically connected across the first electrode and the second electrode, photocurrent from the plurality of organic photovoltaic cells to energize the resistive load; wherein the metal or metal substitute disposed in the stack between at least one pair of the cells forms an electrode or a charge transfer layer.