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Electrochromic window technologies offer dynamic control of the optical transmission of the visible and near-IR portions of the solar spectrum to reduce lighting, heating and cooling needs. Solar cells harvesting near-UV photons could satisfy the unmet need of powering such smart windows without competing for visible or near-IR photons and without aesthetic and design constraints.
Mechanical deformations endured by flexible electronics can induce changes in the electrical resistance of their active electronic component. This effect is quantified by a parameter called the gauge factor. The tunability of both the polarity and the magnitude of the gauge factor of electrically conducting polyaniline can be achieved by structural manipulation.
Small molecules – be they pharmaceuticals, explosives, dyes, flavors for food, or, as the Loo Group studies, molecular semiconductors – can adopt a variety of crystal structures, a phenomenon known as polymorphism.
Grain boundaries act as bottlenecks to charge transport in organic field effect transistors comprising polycrystalline active areas. In the Loo Lab, we have found that the impact of these boundaries depends on the structure of the organic semiconductor (molecular or polymeric) and the method of thin-film formation (solution-processing or thermal evaporation).