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This invention demonstrates excellent near-IR photoactivity for solution-processed bulk heterojunction organic solar cells.
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Solution Processed Bulk Heterojunction Organic Solar Cells Based on Near-IR Absorbing Soluble Phthalocyanines Tech ID: UA11-118 Invention: This invention demonstrates excellent near-IR photoactivity for solution-processed Bulk Heterojunction (BHJ) organic photovoltaic (OPV) devices. For the optimized BHJ devices, the VOC is (a) higher than the corresponding solution processed Planar heterojunction (PHJ) device fabricated from octahexylthio-substituted C6-TiOPc and (b) comparable to the vacuum-deposited PHJ fabricated from Phase-I of the unmodified TiOPc. Background: The solar cells in the current invention convert sunlight in the near-IR region of the solar spectrum to electricity, and they are constructed from a soluble small molecule, rather than polymer, donor materials. An Organic Photovoltaic (OPV) device efficiency can be significantly improved if the optical absorption of the active-layer is extended to the near-IR region of the solar spectrum, where most solar photons are incident, without sacrificing the VOC.
Key Benefits
- The devices have conversion efficiency that extends to 1 micron - Can deposit thin-films over large areas using techniques such as reel-to-reel wet coating, ink-jet printing, and spin-coating
Applications
- They can be deposited in thin-films over large areas using techniques such as reel-to-reel wet coating, ink-jet printing, and spin-coating - Can facilitate the formation of large area, light-weight, low-cost, and potentially flexible devices