Hi Vyacheslav,

Try this one:

Mesolight LLC

4607 W 61st St

Little Rock AR 72209 USA

Phone: 501 562 2070

http://www.mesolight.com

Here is en example of what they have:

1. HMF-ZnSe/ZnS QDs: heavy metal free (HMF), deep blue PL emissions from at 400-440 nm, FWHM50%.

3. GA-CdS/ZnS: with Gradient Alloyed (GA) structures, blue PL emission from at 440-470 nm, HWHM80%, highly stable.

4. GA-CdSe/ZnS QDs: with Gradient Alloyed (GA) structures, PL emission cover entire wavelength range from at 520-650 nm, HWHM