Fe doped LaGaO3: good white light emitters

RSC Advances ◽  
2016 ◽  
Vol 6 (102) ◽  
pp. 100230-100238 ◽  
Author(s):  
Preetam Singh ◽  
Indrani Choudhuri ◽  
Hari Mohan Rai ◽  
Vikash Mishra ◽  
Rajesh Kumar ◽  
...  
Keyword(s):  
White Light ◽  
Emission Spectra ◽  
Ultra Violet ◽  
Light Emitters ◽  
Photoluminescence Emission

Photoluminescence emission spectra from Fe doped LaGaO3. The luminescence due to ultra violet He–Cd laser is shown in the inset.

Study on the Visual Response of Frankliniella occidentalis to Ultra Violet-Visible Spectroscopy with Different Wavelength Ranges

2021 ◽  
Vol 15 (4) ◽  
pp. 497-503
Author(s):  
Qihang Liu ◽  
Yueli Jiang ◽  
Mingqian Zhao ◽  
Jin Miao ◽  
Zhongjun Gong ◽  
...  
Keyword(s):  
White Light ◽  
Frankliniella Occidentalis ◽  
Uv Light ◽  
Ultra Violet ◽  
Western Flower Thrips ◽  
Selection Response ◽  
Visual Sensitivity ◽  
Light Energy ◽  
Visual Response ◽  
Response Effect

To understand the visual sensitivity of western flower thrips to 350–450 nm light, we examined thrips selective response effect and the effect of white light on thrips visual response effect. The results showed that the visual selection response to Ultra Violet (UV) light at 360–365 nm, the approach sensitivity to 380–385 nm light with 6000 lx was respectively the best (15.59, 7.26%), while under light energy, both of them to 360–365 nm light with 60 mW/cm2 were the best (20.04, 11.13%). Under contrast white light, the most sensitive UV spectra of thrips respectively caused by illumination, light energy was 380–385, 360–365 nm, and white light enhanced thrips visual response effect to UV light, which further increased by the increasing intensity, showing that under illumination, the visual response effect to 380–385 nm light with 6000 lx was the best (51.21,69.78%), while that to 360–365 nm light with 60 mW/cm2 were the best (43.98, 65.68%), originated from the different intensity spread by light energy and illumination. These results indicate that the change of photo-stimulus intensity property can regulated thrips visual sensitivity to enhance the phototactic effect.

scholarly journals Causes of Color in Minerals and Gemstones

2001 ◽  
Vol 9 (2) ◽  
pp. 14-17
Author(s):  
Paul F. Hlava
Keyword(s):  
Emission Spectrum ◽  
White Light ◽  
Emission Spectra ◽  
Light Sources ◽  
Physical Phenomena

The colors that one sees when looking at a mineral or gemstone are due to the response of that person's eye to the energies of the light, the emission spectrum of the illumination, and, most importantly, physical phenomena in the material that cause some colors to be absorbed while others are undisturbed or enhanced. It is beyond the scope of this article to do more than touch on the physiology of the eye that allows us to see colors. Likewise, we will not dwell on the emission spectra of various light sources. Rather, we will concentrate on the various ways in which materials, especially minerals and their heights of perfection, gemstones, produce color from white light.

scholarly journals Atomically precise cluster-based white light emitters $$^{\S }$$ §

2018 ◽  
Vol 130 (10) ◽  
Author(s):  
Esma Khatun ◽  
Sandeep Bose ◽  
Madhuri Jash ◽  
Thalappil Pradeep
Keyword(s):  
White Light ◽  
Light Emitters

Single‐Component White‐Light Emitters with Excellent Color Rendering Indexes and High Photoluminescence Quantum Efficiencies

2021 ◽  
pp. 2101640
Author(s):  
Linyuan Lian ◽  
Song Wang ◽  
Huaiyi Ding ◽  
Guijie Liang ◽  
Yong‐Biao Zhao ◽  
...  
Keyword(s):  
White Light ◽  
Single Component ◽  
Light Emitters ◽  
Color Rendering ◽  
Excellent Color

Highly Stable Eu(III) and Tb(III) Complexes Based on Triarylborane-Functionalized Cyclen Derivatives as Visual Temperature Probes and White-Light Emitters

2016 ◽  
Vol 4 (11) ◽  
pp. 1882-1892 ◽  
Author(s):  
Suning Wang ◽  
Tian-Ze Wu ◽  
Hee-Jun Park ◽  
Tai Peng ◽  
Li-Xia Cao ◽  
...  
Keyword(s):  
White Light ◽  
Light Emitters

Investigation of Pr-doped fluoride crystals as possible white-light emitters

2009 ◽  
Vol 31 (8) ◽  
pp. 1205-1209 ◽  
Author(s):  
A. Toncelli ◽  
L. Bonelli ◽  
R. Faoro ◽  
D. Parisi ◽  
M. Tonelli
Keyword(s):  
White Light ◽  
Light Emitters ◽  
Fluoride Crystals

Strong Down-Conversion Emission of Sm3+ Doped Borotellurite Glass under 480 nm Excitation Wavelength

2016 ◽  
Vol 705 ◽  
pp. 204-208
Author(s):  
Siti Nasuha Rafien ◽  
Azman Kasim ◽  
Azhan Hashim ◽  
S. Akmal Syamsyir ◽  
Mardhiah Abdullah ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Emission Spectra ◽  
Ultra Violet ◽  
Luminescence Spectra ◽  
Excitation Wavelength ◽  
Physical Parameters ◽  
Tellurite Glasses ◽  
Physical And Chemical ◽  
Down Conversion ◽  
And Chemical Properties

Tellurite glasses were generally applied in rare earth optical materials due to their excellent in physical and chemical properties. In this study, tellurite glasses composed of (70-x)TeO2-20B2O3-10ZnO-xSm2O3 (x = 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol %) were prepared by conventional melt-quenching technique. Some basic physical parameters such as density, molar volume and oxygen packing density as well as the optical analysis by mean of their absorption and emission spectra have been carried out at room temperature using UV/Vis and photoluminescence spectrophotometer. The result of physical properties are found to vary with respect to concentration of Sm3+ ions content. Meanwhile, three strong absorption peaks are observed and are well resolved in the ultra violet and visible regions due to transitions between the ground state and various excited state of Sm3+ ions. Under 480nm laser excitation, luminescence spectra exhibit four emission bands at 562 nm, 599 nm, 645 nm and 706 nm which corresponding to the transition 4G5/2 → 6H5/2, 4G5/2 → 6H7/2, 4G5/2 → 6H9/2 and 4G5/2 → 6H11/2 were observed. Some other results were also been analysed and presented.

White-Light and Yellow/Blue Photoluminescence Emission Based on Dy3+ -Doped SiO2 -Gd2 O3 Composites

2016 ◽  
Vol 99 (9) ◽  
pp. 3025-3032 ◽  
Author(s):  
Leonardo Alves Rocha ◽  
Marco Antonio Schiavon ◽  
Sidney José Lima Ribeiro ◽  
Jefferson Luis Ferrari
Keyword(s):  
White Light ◽  
Photoluminescence Emission ◽  
Blue Photoluminescence
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