Enhanced thermal stability and afterglow performance in Sr2Ga2-xAlxSiO7: Ce3+ phosphors via band gap tailoring

2021 ◽  
Author(s):  
Rongfu Zhou ◽  
Fengkai Ma ◽  
Yunlin Yang ◽  
Tingting Deng ◽  
Jingwei Li ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Band Gap ◽  
Emission Band ◽  
Persistent Luminescence ◽  
Band Gap Tailoring

In this study, the regulation of Al3+/Ga3+ on Sr2(Ga,Al)2SiO7: Ce3+ phosphors is demonstrated to enhance the photoluminescence and persistent luminescence performances of Ce3+. With the replacement of Al3+, emission band...

Band gap tailoring, structural and optical features of MgS nanoparticles: Influence of Ag+ ions

Optik ◽  
2021 ◽  
pp. 166544
Author(s):  
P. Sakthivel ◽  
K. Kavi Rasu ◽  
A. Sivakami ◽  
P. Muthukrishnan ◽  
G.K.D. Prasanna Venkatesan
Keyword(s):  
Band Gap ◽  
Band Gap Tailoring

Lu3(Al,Si)5(O,N)12:Ce3+ phosphors with broad emission band and high thermal stability for white LEDs

2015 ◽  
Vol 158 ◽  
pp. 322-327 ◽  
Author(s):  
Jiaqing Liu ◽  
Xiaojun Wang ◽  
Tongtong Xuan ◽  
Chunbo Wang ◽  
Huili Li ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Emission Band ◽  
High Thermal Stability ◽  
Broad Emission Band ◽  
White Leds ◽  
Broad Emission

Band-gap evolution, hybridization, and thermal stability ofInxGa1−xNalloys measured by soft X-ray emission and absorption

2002 ◽  
Vol 65 (20) ◽  
Author(s):  
Philip Ryan ◽  
Cormac McGuinness ◽  
James E. Downes ◽  
Kevin E. Smith ◽  
Dharanipal Doppalapudi ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Band Gap ◽  
X Ray

Understanding Persistent Luminescence: Rare-Earth- and Eu2+-doped Sr2MgSi2O7

2014 ◽  
Vol 69 (2) ◽  
pp. 171-182 ◽  
Author(s):  
Mika Lastusaari ◽  
Högne Jungner ◽  
Aleksei Kotlov ◽  
Taneli Laamanen ◽  
Lucas C. V. Rodrigues ◽  
...  
Keyword(s):  
Rare Earth ◽  
Band Gap ◽  
Charge Compensation ◽  
Band Gap Energy ◽  
Persistent Luminescence ◽  
Excitation Spectra ◽  
Co Doping ◽  
The Individual ◽  
Initial Intensity ◽  
The Eu

Similar to many other Eu2+,RE3+-co-doped persistent luminescence materials, for Sr2MgSi2O7:Eu2+,RE3+ the initial intensity and duration of persistent luminescence was also found to depend critically on the rare-earth (RE) co-doping. An enhancement of 1 - 2 orders of magnitude in these properties could be obtained by Dy3+ co-doping whereas total quenching of persistent luminescence resulted from the use of Sm3+ and Yb3+. To solve this drastic disparity, the effects of the individual RE3+ ions were studied with thermoluminescence (TL) spectroscopy to derive information about the formation of traps storing the excitation energy. The charge compensation defects were concluded to be the origin of the complex TL glow curve structure. The tuning of the band gap of the Sr2MgSi2O7 host and especially the position of the bottom of the conduction band due to the Eu2+,RE3+ co-doping was measured with the synchrotron radiation vacuum UV (VUV) excitation spectra of the Eu2+ dopant. The model based on the evolution of the band gap energy with RE3+ co-doping was found to explain the intensity and duration of the persistent luminescence.

scholarly journals Band-gap tailoring of ZnO by means of heavy Al doping

1988 ◽  
Vol 37 (17) ◽  
pp. 10244-10248 ◽  
Author(s):  
B. E. Sernelius ◽  
K.-F. Berggren ◽  
Z.-C. Jin ◽  
I. Hamberg ◽  
C. G. Granqvist
Keyword(s):  
Band Gap ◽  
Al Doping ◽  
Band Gap Tailoring
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