Quantum dot
Videos
Quantum dots or semiconductor nanocrystals are semiconductor particles a few nanometres in size with optical and electronic properties that differ from those of larger particles via quantum mechanical
Quantum dots with gradually stepping emission from violet to deep red
Atomic resolution scanning transmission electron microscopy image of an indium gallium arsenide (InGaAs) quantum dot buried in gallium arsenide (GaAs)
A device that produces visible light, through energy transfer from thin layers of quantum wells to crystals above the layers
Spin-cast quantum dot solar cell built by the Sargent Group at the University of Toronto. The metal disks on the front surface are the electrical connections to the layers below.
Cadmium selenide
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Cadmium selenide is an inorganic compound with the formula CdSe. It is a black to red-black solid that is classified as a II-VI semiconductor of the n-type. It is a pigment, but applications are decli
Quantum dot
…There are colloidal methods to produce many different semiconductors. Typical dots are made of binary compounds such as lead sulfide, lead selenide, cadmium selenide, cadmium sulfide, cadmium telluride, indium arsenide, and indium phosphide. Dots may also be made from ternary compounds such as cadmium selenide…
Sample of nanocrystalline cadmium selenide in a vial
A photograph and representative spectrum of photoluminescence from colloidal CdSe quantum dots excited by UV light.