Preparing of green-emitting CdZnSe ternary nanocrystals with narrow emission spectrum.

In order to expand the color gamut of liquid crystal displays, colloidal semiconductor nanocrystals (NCs) with narrow emission peaks were introduced as down-converters for the backlight, in which the green-emitting NC is the critical and challenging part. Herein green-emitting CdZnSe ternary NCs, with narrow emission line width of ∼18 nm, were synthesized. By combining these green-emitting NCs with blue light-emitting diode and red-emitting CdSe-based NCs a wider color gamut of ∼136% can be reached, relative to the National Television Standard Committee (NTSC) in the 1931 CIE color coordinates space. The influence factors on narrow line width, such as size/morphology distribution and surface state, were investigated by transmission electron microscope (TEM) images and time resolved spectrometry. The synthetic conditions of these NCs were discussed also. [ABSTRACT FROM AUTHOR]