This patented technology covers materials and methods for making soluble Titanyl Phthalocyanines (TiOPc) with thin-film near-IR absorptivity for use as organic semiconductors.

About

Soluble Titanyl Phthalocyanines with Enhanced Thin-Film Near-IR Absorptivity Tech ID: UA10-102 Invention: This patented technology covers materials and methods for making Titanyl Phthalocyanines (TiOPc) and rendering them soluble using peripheral substituents. In addition, the method eliminates the need for a solvent in the synthesis step, and increases the purity of yield of the isolated materials. Furthermore, the organic molecules exhibit increased absorbance of near-infrared light, increasing the potential number of photons that can be converted to charge carriers in organic photovoltaics, consequentially, increasing the overall efficiency of an organic photovoltaic device. In a nutshell, these TiOPc derivatives with peripheral substituents provide increased solubility of TiOPc and optimized solid-state morphology, which has not been achieved before. Background: Phthalocyanines are a versatile class of p-conjugated organic semiconductors applicable as materials in several electronic devices such as organic xerographic protoreceptors, nonlinear optical components, field-effect transistors, organic light-emitting diodes, and solar cells (i.e. organic electronics). Titanyl Phthalocyanine (TiOPc) is a known photoconductor and solid state IR absorber. Absorption of light in thin-films of organic semiconductors is one of the four major processes - light absorption, exciton migration, charge separation, charge collection - that are essential for performance of an organic photovoltaic (OPV) device. Status: issued U.S. patent #9,505,770

Key Benefits

- Provides a method making the manufacture of Phthalocyanines easier, cheaper and more environmentally friendly - A method of solubilizing Titanyl Phthalocyanines, making the production of thin films and coatings cheaper and easier - These materials adsorb light into the near IR region, up to 1,000 nanometers, a wavelength that other solar cell technology cannot utilize - These Titanyl Phthalocyanines thin films are photovoltaic - These Titanyl Phthalocyanines materials can be incorporated into bulk hetero-junctions, meaning the material can be intimately mixed with other photovoltaic materials in a single layer making the free exchange of electrons more efficient

Applications

- TiOPc derivatives can be used as the organic donor material in Organic Photovoltaic (OPV) devices - Phthalocyanines are also applicable to organic field effect transistors (OFETs) - Can be used in organic light emitting devices (OLEDs)

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