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Enhanced Thin Film Organic Photovoltaic Devices

Brookhaven National Laboratory

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An Embodiment of the Optical Field Confinement Device
An Embodiment of the Optical Field Confinement Device

Technology Marketing Summary

A novel structure design for thin film organic photovoltaic (OPV) devices provides a system for increasing the optical absorption in the active layer. The waveguided structure permits reduction of the active layer thickness, resulting in enhanced charge collection and extraction, leading to improved power conversion efficiency compared to standard OPV devices.


High optical absorption in OPV devices demands an active layer thickness of about 150 nm, a thickness that results in inefficient charge collection. To decrease the thickness of the active layer a new structure has been designed that increases the optical absorption in very thin film OPV devices. The structure makes use of a slot-waveguide approach to confine the electromagnetic field in the thin active layer. The invention enables a stronger optical absorption in the active layers that are thin enough to have electrical transport gain leading to a significant increase in internal quantum efficiency (IQE) and a higher overall power conversion efficiency.


In order to exploit the utility of organic photovoltaic devices they must be improved to compete effectively with the more standard inorganic photovoltaic solar cells. The power conversion improvement offered by this easily implemented design should result in an OPV device with very competitive output.

Applications and Industries

Solar device manufacturers; green energy innovators

More Information

WO 2013/173740 published on November 21, 2013

Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
BSA 12-26PrototypeAvailable01/10/201401/10/2014

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To: Avijit Sen<>