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
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.
U.S. Patent Application Number 12/566278, filed on September 24, 2009
Last revised: November 8, 2010
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