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Cadmium sulfide quantum dots on cells. 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 ...
Another application of this technique involves using Zinc Sulfide quantum dots to treat industrial waste water. [19] Indium An alternative to the heavy metal quantum dots are quantum dots that contain Indium. One example is the use of CuInS2 quantum dots as fluorescent labels that emit light in the near infrared region of the visible spectrum. [20]
Brus is a foundational figure in the research and development of quantum dots. Quantum dots are tiny semiconducting crystals whose nanoscale size gives them unique optical and electronic properties. [5] Brus was independently the first to synthesize them in a solution in 1982.
Cadmium sulfide is the inorganic compound with the formula CdS. Cadmium sulfide is a yellow salt. [4] It occurs in nature with two different crystal structures as the rare minerals greenockite and hawleyite, but is more prevalent as an impurity substituent in the similarly structured zinc ores sphalerite and wurtzite, which are the major economic sources of cadmium.
Quantum confinement effects in quantum dots can also result in fluorescence intermittency, called "blinking." [14] CdSe quantum dots have been implemented in a wide range of applications including solar cells, [15] light emitting diodes, [16] and biofluorescent tagging. CdSe-based materials also have potential uses in biomedical imaging. Human ...
Quantum dots are popular alternatives to organic dyes as fluorescent labels for biological imaging and sensing due to their small size, tuneable emission, and photostability. The luminescent properties of quantum dots arise from exciton decay (recombination of electron hole pairs) which can proceed through a radiative or nonradiative pathway.
Cadmium selenide: CdSe: 1.74 [6] direct: Nanoparticles used as quantum dots. Intrinsic n-type, difficult to dope p-type, but can be p-type doped with nitrogen. Possible use in optoelectronics. Tested for high-efficiency solar cells. II-VI: 2: Cadmium sulfide: CdS: 2.42 [6] direct: Used in photoresistors and solar cells; CdS/Cu 2 S was the first ...
A quantum dot solar cell (QDSC) is a solar cell design that uses quantum dots as the captivating photovoltaic material. It attempts to replace bulk materials such as silicon , copper indium gallium selenide ( CIGS ) or cadmium telluride ( CdTe ).
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