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Toronto, Canada

Mirtchev P.,University of Toronto | Henderson E.J.,Opalux Incorporated | Soheilnia N.,University of Toronto | Yip C.M.,University of Toronto | Ozin G.A.,University of Toronto
Journal of Materials Chemistry | Year: 2012

Carbon quantum dots (CQDs) have recently emerged as viable alternatives to traditional semiconductor quantum dots because of their facile and low cost synthesis, long term colloidal stability, and low environmental and biological toxicity. The compatible surface chemistry, good solubility in polar solvents and extensive optical absorption throughout the visible and near-infrared wavelength regions render CQDs as potentially useful sensitizers for photovoltaic applications. Presented herein is a new strategy for the solution phase synthesis of water-soluble, colloidally stable CQDs and a preliminary exploration of their utilization as sensitizers in nanocrystalline TiO 2 based solar cells. Under AM 1.5 illumination, the Voc and FF values reach 380 mV and 64% respectively, achieving a power conversion efficiency of 0.13%. © The Royal Society of Chemistry 2012.

Bonifacio L.D.,University of Toronto | Ozin G.A.,University of Toronto | Arsenault A.C.,Opalux Incorporated
Small | Year: 2011

Smelling with photonic color is a simple and cost-effective method to tackle sensing problems of great practical relevance, including water-quality analysis and monitoring of high-value foods such as fish and meat. New methods for the selection of statistically relevant, multivariate information can enhance results and bring real applications closer to practice. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Opalux Incorporated | Date: 2011-11-10

A light-scattering photonic material is disclosed having a matrix defining a plurality of disordered voids. The material may be reversibly responsive to an external stimulus, exhibiting reversible first and second optical effects. The material may be a thin film material.

Opalux Incorporated | Date: 2013-09-25

A tunable photonic crystal device comprising: alternating layers of a first material and a second material, the alternating layers comprising a responsive material, the responsive material being responsive to an external stimulus, the alternating layers having a periodic difference in refractive indices giving rise to a first reflected wavelength; wherein, in response to the external stimulus, a change in the responsive material results in a reflected wavelength of the device shifting from the first reflected wavelength to a second reflected wavelength.

Opalux Incorporated | Date: 2010-11-12

A photonic crystal incandescent light source comprising: a photonic crystal having a structure configured to reflect wavelengths from at least a portion of an infrared spectrum; and an incandescent central filament in the photonic crystal, causing the photonic crystal to transmit wavelengths from at least a portion of a visible spectrum; wherein the light source emits at least a portion of visible wavelengths and suppresses emission of at least a portion of infrared wavelengths.

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