Hello
I want to know, how to chose appropriate semiconductor material for QD synthesis?
it is base on bandgap? or something else? how scientists know that the I-III-VI elements (for example) are appropriate for QDs?
Thanks
Quantum dots are nanoparticles of small semiconductors of 1-4 nm. The band gap depends on the size of the nanoparticles. The smaller the size of the nanoparticles, the greater the energy of the band gap of the nanoparticles. The synthesis of nanoparticles is described in the literature. For example, cadmium sulfide is produced by an ion condensation reaction. The most famous quantum dots are TiO2, CdS, CdSe, CdTe. You can look at additional data in files
Dear Kambiz Hosseinpanahi , First of all, you must understand for what purposes you need colloid quantum dots. For example, they are actively used for photoluminescence. The basic requirements for semiconductor materials, which are synthesized on the basis of quantum dots, are as follows. This primarily direct-gap nature band spectrum - provides an efficient luminescence, second small effective mass of the charge carriers - manifestation of the quantum size effects in a sufficiently wide range of sizes (of course by the standards of nanocrystals). In addition to composition and size, a serious influence on the properties of quantum dots will be render their form.
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