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Hybrid Nanocrystals-organic-semiconductor Light Sensor

T. Aqua, R. Naaman, A. Aharoni, U. Banin, Y. Paltiel
Published 2008 · Physics

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We present a light sensing device based on nearly spherical, defect free colloidal nanocrystals (NCs) of InAs acting as a light activated gate for a GaAs∕AlGaAs field effect semiconductor transistor. We use self-assembled organic monolayer as linkers that attach the InAs NCs to the surface of the semiconductor device, instead of the gate that exists in common transistors. When the NCs absorb light, at a frequency corresponding to their resonance, a change in the current through the transistor takes place while no current flows through the NCs themselves.
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