Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5402093 | Journal of Luminescence | 2011 | 5 Pages |
Photoluminescence (PL) enhancement of SrSi2O2N2:Eu and the resultant color improvement of white-light were investigated via co-doping Mn with Eu. We observed that a unique absorption of host lattice of SrSi2O2N2 and its visible band emission peaked at around â¼550Â nm for SrSi2O2N2:Mn2+ in the wavelength range of 450-600Â nm. This highly eye-sensitive â¼550Â nm-peaked band emission of SrSi2O2N2 doped with Mn2+ happens to overlap the 535Â nm-peaked band emission of SrSi2O2N2 doped with Eu2+, resulting in an intensified photoluminescence in a maximum by 355%. By combining this as-prepared Mn intensified SrSi2O2N2:Eu phosphor with blue InGaN chip, the quality of white-light was improved to 93.3% for color rendering index and 3584Â K for correlated color temperature.
Research highlightsPhotoluminescence enhancement and resultant color improvement of SrSi2O2N2: Eu can be adjusted via co-doping Mn with Eu. The band emission peaked at â¼550 for Mn2+ overlaps that at â¼535 nm for Eu2+. A white-light with 93.3% for CRI and 3584 K for CCT is achieved.