Loading...
Please wait, while we are loading the content...
Similar Documents
Generation of White Light from Sr 2x Ca x MgSi 2 O 7 : Dy 3 + ( x = 0 , 1 , 2 ) Phosphors
| Content Provider | Semantic Scholar |
|---|---|
| Author | Bisen, D. P. Sahu, Ishwar Prasad |
| Copyright Year | 2015 |
| Abstract | Dysprosium doped alkaline earth silicates namely Sr2-xCaxMgSi2O7:Dy 3+ (x = 0, 1, 2) phosphors was prepared by the traditional high temperature solid state reaction method. The crystal structure of sintered Sr2xCaxMgSi2O7:Dy 3+ (x = 0, 1, 2) phosphors were an akermanite type structure which belongs to the tetragonal crystallography 21m, this structure is a member of the melilite group and forms a layered compound. The optical properties of Sr2-xCaxMgSi2O7:Dy 3+ (x = 0, 1, 2) phosphors were investigated using photoluminescence (PL) properties. Under the ultraviolet excitation, the emission spectra of Sr2-xCaxMgSi2O7:Dy 3+ (x = 0, 1, 2) phosphors, the characteristic emission of Dy 3+ peaking at blue, yellow and red color, originating from the transitions of 4 F9/2 → 6 H15/2, 4 F9/2 → 6 H13/2 and 4 F9/2 → 6 H11/2 transitions. The combination of these three emissions constituted as white light emission confirmed by the Commission Internationale de L'Eclairage (CIE) chromatic coordinate diagram. The possible mechanism of white light emitting Sr2-xCaxMgSi2O7:Dy 3+ (x = 0, 1, 2) phosphors were also investigated. Keywords— Alkaline earth silicates; XRD; Photoluminescence; CIE color co-ordinates. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.ijlaindia.org/wp-content/uploads/2015/07/Volume5/Issue2/85.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
