Back to Search
Start Over
Enhanced narrow-band green-emission and thermal stability via the introduction of Mg2+ in ZnB2O4:Mn2+ phosphor.
- Source :
- CrystEngComm; 10/21/2019, Vol. 21 Issue 39, p5947-5957, 11p
- Publication Year :
- 2019
-
Abstract
- A narrow-band green-emitting phosphor ZnB<subscript>2</subscript>O<subscript>4</subscript>:Mn<superscript>2+</superscript>, Mg<superscript>2+</superscript> was prepared by solid-state reactions. X-ray diffraction (XRD) and the Rietveld structural refinements were performed. The results show that the introduction of Mg<superscript>2+</superscript> may suppress the formation of an impurity phase. The micro-structure, photoluminescence (PL) and reflectance spectra, PL decay curves as well as thermal quenching behavior were investigated. The phosphors exhibit a broad absorption band from 200 to 510 nm, while the emission spectra show a narrow band centered at 538 nm with a full-width at half-maximum (FWHM) of about 34 nm. Furthermore, after the introduction of Mg<superscript>2+</superscript>, the luminescence intensity of phosphor ZnB<subscript>2</subscript>O<subscript>4</subscript>:0.07Mn<superscript>2+</superscript>, 0.10Mg<superscript>2+</superscript> is significantly enhanced by about 2 times, and it presents a relatively low thermal quenching behavior. The corresponding mechanisms for performance improvement were investigated in detail and the ion-size compensation effect of Mg<superscript>2+</superscript> to Mn<superscript>2+</superscript> is proposed. Additionally, the high activation energy (0.202 eV) and ultra-high color purity (97%) were calculated. These results imply that the ZnB<subscript>2</subscript>O<subscript>4</subscript>:Mn<superscript>2+</superscript>, Mg<superscript>2+</superscript> phosphor has broad application prospects in the field of advanced backlight display. Moreover, the introduction of Mg<superscript>2+</superscript> may be useful as an effective strategy to enhance the luminescence properties and thermal stability of Mn<superscript>2+</superscript> or even other element-doped phosphors. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14668033
- Volume :
- 21
- Issue :
- 39
- Database :
- Complementary Index
- Journal :
- CrystEngComm
- Publication Type :
- Academic Journal
- Accession number :
- 139013271
- Full Text :
- https://doi.org/10.1039/c9ce01123d