| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1529337 | Materials Science and Engineering: B | 2012 | 4 Pages |
Novel Eu2+-doped Ca2AlSi3O2N5 phosphors with a general formula of EuxCa2−xAlSi3O2N5 were successfully prepared via a solid-state reaction method under a nitrogen atmosphere. The produced phosphors were effectively excited by UV–vis light in the wavelength range between 250 and 400 nm, and featured an intense green emission band which peaked at about 500 nm. The emission spectra featured a red-shift over increasing Eu2+ content and the temperature of heat treatment. The maximum intensity of emission was obtained for x = 0.014 and heat treatment at 1450 °C. The photoluminescence properties of the produced Ca2AlSi3O2N5:Eu2+ phosphors qualify them for consideration in potential use as green phosphors in UVLED-based white LED.
► We successfully produced a novel Ca2AlSi3O2N5:Eu2+ phosphors. They have a single intense broad green band centered at c.a. 500 nm and the excitation spectra match well with the emission of UV LED chips (350–410 nm), these qualify them for consideration in potential use as green phosphors in UVLED-based white LED. ► The phosphors can be prepared in lower temperature than the other sialon-based materials, although they have excellent optical properties. ► We studied impact factors on the photoluminescence behavior of the produced phosphors, and found we could tune the intensity and the emission spectra with these characteristic.
