Protected-annealing regulated defects to improve optical properties and luminescence performance of Ce:YAG transparent ceramics for white LEDs

2019 ◽  
Vol 7 (14) ◽  
pp. 4057-4065 ◽  
Author(s):  
Bingheng Sun ◽  
Le Zhang ◽  
Tianyuan Zhou ◽  
Cen Shao ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Redox State ◽  
Annealing Treatment ◽  
Transparent Ceramics ◽  
White Leds ◽  
Luminescence Performance

The redox state of cerium and elimination of defects were synergistically regulated by a protected-annealing treatment in Ce:YAG transparent ceramics.

Taguchi method-assisted optimization of multiple effects on the optical and luminescence performance of Ce:YAG transparent ceramics for high power white LEDs

2019 ◽  
Vol 7 (37) ◽  
pp. 11431-11440 ◽  
Author(s):  
Le Zhang ◽  
Qing Yao ◽  
Yuelong Ma ◽  
Bingheng Sun ◽  
Cen Shao ◽  
...  
Keyword(s):  
Taguchi Method ◽  
Thermal Performance ◽  
High Power ◽  
Transparent Ceramics ◽  
Packaging Technology ◽  
White Leds ◽  
Luminescence Performance

Ce:YAG transparent ceramics have great potential in white LEDs, especially under high power packaging technology, due to their superior thermal performance.

Fabrication and optical properties of divalent Cu2+ ions incorporated Ce:YAG transparent ceramics for white LEDs

2019 ◽  
Vol 45 (4) ◽  
pp. 4817-4823 ◽  
Author(s):  
Yuelong Ma ◽  
Le Zhang ◽  
Lei Zhang ◽  
Tianyuan Zhou ◽  
Zhigang Jiang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Transparent Ceramics ◽  
White Leds

Simple mass-preparation and enhanced thermal performance of Ce: YAG transparent ceramics for high power white LEDs

2019 ◽  
Vol 45 (5) ◽  
pp. 6356-6362 ◽  
Author(s):  
Qing Yao ◽  
Le Zhang ◽  
Jing Zhang ◽  
Zhigang Jiang ◽  
Bingheng Sun ◽  
...  
Keyword(s):  
Thermal Performance ◽  
High Power ◽  
Transparent Ceramics ◽  
White Leds ◽  
Simple Mass

Growth of Rutile TiO2 Nanorods by Chemical Bath Deposition Method on Silicon Substrate at Different Annealing Temperature

2014 ◽  
Vol 624 ◽  
pp. 129-133 ◽  
Author(s):  
Abbas M. Selman ◽  
Zainuriah Hassan
Keyword(s):  
Optical Properties ◽  
Chemical Bath Deposition ◽  
Visible Region ◽  
Annealing Treatment ◽  
Silicon Substrates ◽  
X Ray Diffraction ◽  
Rutile Structure ◽  
Uv Emission ◽  
Cbd Method ◽  
P Type

Effects of annealing treatment on growth of rutile TiO2nanorods on structural, morphological and optical properties of TiO2nanorods were investigated. The nanorods were fabricated on p-type (111)-oriented silicon substrates and, all substrates were seeded with a TiO2seed layer synthesized by radio-frequency reactive magnetron sputtering system. Chemical bath deposition (CBD) was carried out to grow rutile TiO2nanorods on Si substrate at different annealing temperatures (350, 550, 750, and 950 °C). Raman spectroscopy, X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) analyses showed the tetragonal rutile structure of the synthesized TiO2nanorods. Optical properties were examined by photoluminescence spectroscopy. The spectra exhibit one strong UV emission peak which can be seen at around 390 nm for all of the samples. In the visible region, TiO2demonstrated two dominant PL emissions centered at around 519 and 705 nm. The experimental results showed that the TiO2nanorods annealed at 550 °C exhibited the optimal structural properties. Moreover, the CBD method enabled the formation of photosensitive, high-quality rutile TiO2nanorods with few defects for future optoelectronic nanodevice applications.

Effects of As Doping on Properties of ZnO Films

2001 ◽  
Vol 692 ◽  
Author(s):  
K. S. Huh ◽  
D. K. Hwang ◽  
K. H. Bang ◽  
M. K. Hong ◽  
D. H. Lee ◽  
...  
Keyword(s):  
Optical Properties ◽  
Secondary Ion Mass Spectrometry ◽  
Annealing Treatment ◽  
Zno Films ◽  
X Ray Diffraction ◽  
Electrical And Optical Properties ◽  
As Doping ◽  
Dopant Atoms ◽  
Increasing Temperature ◽  
Secondary Ion

AbstractA series of ZnO thin films with various deposition temperatures were prepared on (100) GaAs substrates by radio-frequency magnetron sputtering using ZnO target. The ZnO films were studied by field emission scanning electron microscope(FESEM), x-ray diffraction(XRD), photoluminescence(PL), cathodoluminescence(CL), and Hall measurements. The structural, optical, and electrical properties of the films were discussed as a function of the deposition temperature. With increasing temperature, the compressive stress in the films was released and their crystalline and optical properties were improved. From the depth profile of As measured by secondary ion mass spectrometry(SIMS), As doping was confirmed, and, in order to activate As dopant atoms, post-annealing treatment was performed. After annealing treatment, electrical and optical properties of the films were changed.

Effect of MgO doping on the structure and optical properties of YAG transparent ceramics

2020 ◽  
Vol 40 (3) ◽  
pp. 861-866 ◽  
Author(s):  
I. Vorona ◽  
A. Balabanov ◽  
M. Dobrotvorska ◽  
R. Yavetskiy ◽  
O. Kryzhanovska ◽  
...  
Keyword(s):  
Optical Properties ◽  
Transparent Ceramics

YAG: Ce3+,Mn2+ transparent ceramics prepared by gel-casting for warm white LEDs

2019 ◽  
Vol 213 ◽  
pp. 421-426 ◽  
Author(s):  
Bin Wang ◽  
Junrong Ling ◽  
Youfu Zhou ◽  
Wentao Xu ◽  
He Lin ◽  
...  
Keyword(s):  
Transparent Ceramics ◽  
White Leds ◽  
Gel Casting
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