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Interdigitated Electrical Contacts for Low Electronic Mobility Semiconductor Photovoltaic Devices

Brookhaven National Laboratory

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Technology Marketing Summary

Structures useful for forming contacts to materials having low charge carrier mobility are described. Methods for their formation and use are also described. These structures include interdigitated electrodes capable of making electrical contact to semiconducting materials having low electron and/or hole mobility. In particular, these structures are useful for organic semiconducting devices made with conducting polymers and small molecules. They are also useful for semiconducting devices made with nanocrystalline semiconductors.

Description

A nanostructured template is first formed by, in one case, electron beam lithography. The template comprises a grating formed in an electrically conductive substrate. In step two, this grating is oxidized to form an insulating layer on its surface. This insulator electrically isolates the surface from the conducting substrate. Metal is then deposited to form top and bottom contacts. This may be done in a single step for top and bottom contacts made from the same material, or serially to deposite different metallic material as the top and the bottom electrodes. In the final step, after the formation of the electrodes, the template is filled with active semiconducting material. This active material may be organic, such as conductive polymer blends, or inorganic, such as in the case of nanocrystals.

Benefits

These electrode structures allow contact to be made to the active material in a photovoltaic cell without the use of a transparent conductor.

Applications and Industries

Photovoltaic cells; OLEDs; BHJ PV structures.

Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Date
Application 20140216539
Application
20140216539
INTERDIGITATED ELECTRICAL CONTACTS FOR LOW ELECTRONIC MOBILITY SEMICONDUCTORS
Structures useful for forming contacts to materials having low charge carrier mobility are described. Methods for their formation and use are also described. These structures include interdigitated electrodes capable of making electrical contact to semiconducting materials having low electron and/or whole mobility. In particular, these structures are useful for organic semiconducting devices made with conducting polymers and small molecules. They are also useful for semiconducting devices made with nanocrystalline semiconductors.
Brookhaven National Laboratory 04/27/2012
Filed
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
BSA 11-26PrototypeAvailable01/09/201401/09/2014

Contact BNL About This Technology

To: Avijit Sen<asen@bnl.gov>