Case 12843

Organic Based Solar Cell with Patterned Exciton Blocking Layer


Photon processing structures, organic-based solar cells, nanopatterned substrates, exciton blocking layer


Organic solar cells, sensors, photon-emission devices, portable “off-grid” power generation sources

  • Limit on the efficiencies of the conventional planar bilayer structure of organic-based solar cells
  • Poor coverage over the solar spectrum


Organic semiconducting layers are configured with certain nanosized features to enhance solar radiation absorption while maintaining the thickness of the layers within the order of one exciton diffusion length. The p-type and n-type semiconductors can be configured to form single p-n junctions, multiple separate junctions, or bulk heterojunctions. Nanofeatures can also be used on an exciton blocking layer surface formed from organic polymers. The photon processing device includes a conducting substrate or a metal bus line to transport the generated current. The substrate is transparent to certain wavelengths of the solar radiation and may include a textured surface with periodic nanosized features. The photo processing device may also have multiple n-p layers coupled to act as parallel p-n junctions. The device can be fabricated using nanoimprint and thermal evaporation techniques on flexible substrates.

  • Improvement in conversion efficiency by a factor of 2 or more
  • Enhancement in electronic transport characteristics
  • Ease of fabrication


Intellectual Property:

U.S. Patent Application Number 12/566278, filed on September 24, 2009



Last revised: November 8, 2010

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