scholarly journals Bright green emission from the Mn^2+-doped zinc gallogermanate phosphors

2013 ◽  
Vol 3 (10) ◽  
pp. 1727 ◽  
Author(s):  
Xiaoqing Xu ◽  
Jing Ren ◽  
Guorong Chen ◽  
Deshuang Kong ◽  
Changjun Gu ◽  
...  
Keyword(s):  
Green Emission ◽  
Bright Green

Ho-doped SrBi2 Nb2 O9 multifunctional ceramics with bright green emission and good electrical properties

2017 ◽  
Vol 214 (10) ◽  
pp. 1700276 ◽  
Author(s):  
Lei Yu ◽  
Jigong Hao ◽  
Zhijun Xu ◽  
Wei Li ◽  
Ruiqing Chu
Keyword(s):  
Electrical Properties ◽  
Green Emission ◽  
Bright Green

Highly Efficient Multifunctional Phosphorescent Dendrimers Consisting of an Iridium-Complex Core and Charge-Transporting Dendrons for Organic Light-Emitting Devices

2005 ◽  
Vol 871 ◽  
Author(s):  
Toshimitsu Tsuzuki ◽  
Nobuhiko Shirasawa ◽  
Toshiyasu Suzuki ◽  
Shizuo Tokito
Keyword(s):  
First Generation ◽  
Green Emission ◽  
Iridium Complex ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Hole Transporting ◽  
Complex Core ◽  
Bright Green ◽  
Organic Light Emitting Devices

AbstractWe report a novel class of emitting materials for use in the organic light-emitting devices (OLEDs): multifunctional phosphorescent dendrimers that have a phosphorescent core and have charge transporting dendrons. We have synthesized first-generation and second-generation dendrimers consisting of a fac-tris(2-phenylpyridine)iridium [Ir(ppy)3] core and hole transporting phenylcarbazole-based dendrons. Smooth amorphous films of these dendrimers were formed by spin-coating them from solutions. The OLEDs using the dendrimer exhibited bright green or yellowish-green emission from the Ir(ppy)3 core. The external quantum efficiency of the OLED using the mixture film of the first-generation dendrimer and an electron-transporting material was as high as 7.6%.

The Luminescence Properties of BaGd2(MoO4)4: Eu3+, Er3+, Yb3+ Phosphors

2010 ◽  
Vol 663-665 ◽  
pp. 137-140 ◽  
Author(s):  
Jia Yue Sun ◽  
Wei Hang Zhang ◽  
Yu Jing Lan ◽  
Hai Yan Du
Keyword(s):  
Red Light ◽  
Green Light ◽  
Green Emission ◽  
Infrared Light ◽  
Solid State Method ◽  
Light Excitation ◽  
Bright Green ◽  
State Method ◽  
Uv Excitation ◽  
Color Emission

Two-color emission phosphors BaGd2(MoO4)4: Eu3+, Er3+, Yb3+ have been synthesized by the high temperature solid-state method. The as-prepared BaGd2(MoO4)4: Eu3+, Er3+, Yb3+ phosphors can emit intense red light under 395 nm UV excitation, while it will show bright green light upon 980 nm infrared light excitation. It is found that the red emission peaks at 595 and 614 nm should be attributed to 5D0-7F1 and 5D0-7F2 transitions of Eu3+, respectively. The green emission peaks centered at 532 and 553 nm under 980 nm excitation, are attributed to Er3+ transitions from 4H11/2 -4I15/2 and 4S3/2-4I15/2, respectively.

Martian visible and ultraviolet dayglow: altitude, latitudinal and seasonal variations observed with NOMAD/TGO

2020 ◽  
Author(s):  
Jean-Claude Gérard ◽  
Shohei Aoki ◽  
Leonardos Gkouvelis ◽  
Yannick Willame ◽  
Cédric Depiesse ◽  
...  
Keyword(s):  
Green Emission ◽  
Trace Gas ◽  
Main Peak ◽  
Green Line ◽  
Model Calculations ◽  
Special Mode ◽  
Bright Green ◽  
Far Ultraviolet ◽  
First Time ◽  
Applied Optics

<p>The OI 557.7 nm green line has been measured in the Martian dayglow for the first time with the UVIS visible-ultraviolet spectrograph on board ESA’s Trace Gas Orbiter (Gérard et al., 2020). The first observations started in April 2019 in a special mode where the spacecraft is tilted to observe the limb with the UVIS nadir channel (Vandaele et al., 2015, Patel et al., 2017). The instrument detected the presence of bright green dayglow emission on every of those observations. The main peak altitude is located near 80 km, and its intensity varies as a result of the changing distance from sun, the local time and latitude of the observations. A second, less pronounced, emission peak is observed near 110 km. Photochemical model simulations (Gkouvelis et al., 2018) used the MCD density distribution (Forget et al., 1999) have been made to understand the sources of this airglow emission. It is able to reproduce the altitude and the brightness of the airglow layer. It indicates that the green line dayglow on Mars is essentially produced by photodissociation of CO<sub>2</sub> molecules by solar far ultraviolet radiation (Fox & Dalgarno, 1979). A fraction of the oxygen atoms is formed in the <sup>1</sup>S metastable state that produces the green emission.</p> <p>In this presentation, we describe additional dayside observations obtained since December 2019. For this purpose, the spacecraft has been used in a special mode where it is re-oriented so that the UVIS channel observed the sunlit limb (Lopez-Valverde et al., 2018). We analyse the observed limb profile variations and the changing altitude of the peak emission resulting from the variations of the pressure levels in the mesosphere (Gkouvelis et al., 2020). The measured intensities are compared with model calculations of the O(<sup>1</sup>S) density in the conditions of the observations. The ratio of ultraviolet spectral features relative to the oxygen emission also observed with UVIS will also be analysed. </p> <p>REFERENCES</p> <p>Forget, F. et al., J. Geophys. Res. <strong>104</strong>(E10), 24155-24175 (1999).</p> <p>Fox, J.L. & Dalgarno, J. Geophys. Res. <strong>84</strong>(A12), 7315-7333 (1979).</p> <p>Gérard, J.C. et al., Nature Astronomy, 1-4 (2020), https://doi.org/10.1038/s41550-020-1123-2</p> <p>Gkouvelis, L. et al., J. Geophys.Res., <strong>123</strong>(12), 3119-3132. (2018).</p> <p>Gkouvelis, L. et al.,  Icarus, 341, 113666 (2020).</p> <p>López-Valverde M. et al.,  Space Science Reviews, <strong>214</strong>(1), 29 (2018).</p> <p>Patel, M. R. et al.,  Applied optics, <strong>56</strong>(10), 2771-2782 (2017).</p> <p>Vandaele, A. C. et al.,  Optics Express, <strong>23</strong>(23), 30028-30042 (2015).</p>

Bright green emission and temperature dependent localized bound exciton transitions from undoped ZnO films

2016 ◽  
Vol 42 (12) ◽  
pp. 13819-13823 ◽  
Author(s):  
Xiangdong Meng ◽  
Yuxue Zhou ◽  
Xianghua Zeng ◽  
Xiaobing Chen
Keyword(s):  
Green Emission ◽  
Zno Films ◽  
Temperature Dependent ◽  
Bright Green ◽  
Exciton Transitions

scholarly journals Bright green emission from f-MWCNT embedded co-doped Bi3+ + Tb3+:polyvinyl alcohol polymer nanocomposites for photonic applications

RSC Advances ◽  
2017 ◽  
Vol 7 (25) ◽  
pp. 15084-15095 ◽  
Author(s):  
K. Naveen Kumar ◽  
R. Padma ◽  
Y. C. Ratnakaram ◽  
Misook Kang
Keyword(s):  
Carbon Nanotube ◽  
Polyvinyl Alcohol ◽  
Polymer Nanocomposites ◽  
Green Emission ◽  
Multi Walled Carbon Nanotube ◽  
Bright Green ◽  
Uv Excitation ◽  
Co Doped

A bright, dazzling green emission has been obtained from functionalized multi walled carbon nanotube (f-MWCNT)-embedded Bi3+ + Tb3+:PVA polymer nanocomposites under UV excitation.

scholarly journals Green Phosphors Based on 9,10-bis((4-((3,7-dimethyloctyl)oxy) phenyl) ethynyl) Anthracene for LED

Micromachines ◽  
2019 ◽  
Vol 10 (10) ◽  
pp. 703
Author(s):  
Xuefeng Ren ◽  
Hai Song ◽  
Jing Xiao ◽  
Hui-Juan Yu ◽  
Chi-Fang Peng ◽  
...  
Keyword(s):  
Blue Light ◽  
Light Emitting Diode ◽  
Visible Region ◽  
Green Light ◽  
Green Emission ◽  
Coupling Reactions ◽  
Light Emitting ◽  
Good Thermal Stability ◽  
Light Excitation ◽  
Bright Green

An anthracene aromatic unit was introduced into the phenylethynyl structure by a rigid acetylene linkage at the C-9 and C-10 positions via Sonogashira coupling reactions, resulting in a planar and straight-backbone molecule (9,10-bis((4-((3,7-dimethyloctyl)oxy) phenyl) ethynyl) anthracene) (BPEA). Thermogravimetric analysis demonstrated the good thermal stability of the BPEA. Photoluminescence analysis showed that a suitable expanded π-conjugation in the BPEA made its excitation band extend into the visible region, and an intense green emission was observed under blue-light excitation. A bright green light-emitting diode with an efficiency of 18.22 lm/w was fabricated by coating the organic phosphor onto a 460 nm-emitting InGaN chip. All the results indicate that BPEA is a useful green-emitting material which is efficiently excited by blue light, and therefore, that it could be applied in many fields without UV radiation.

Bright green emission in Ho doped Bi1/2Na1/2TiO3 ferroelectric ceramics

2014 ◽  
Vol 115 ◽  
pp. 129-131 ◽  
Author(s):  
T. Wei ◽  
Z. Chang ◽  
Q.J. Zhou ◽  
D.M. An ◽  
Z.P. Li ◽  
...  
Keyword(s):  
Green Emission ◽  
Ferroelectric Ceramics ◽  
Bright Green

scholarly journals A Facile Synthesis and Optical Properties of Bundle-Shaped TbPO4·H2O Nanorods

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Dan Yue ◽  
Wen Luo ◽  
Wei Lu ◽  
Ruiyong Wang ◽  
Chunyang Li ◽  
...  
Keyword(s):  
Diffuse Reflectance ◽  
Reflectance Spectrum ◽  
Uv Light ◽  
Diffuse Reflectance Spectrum ◽  
Green Emission ◽  
Hexagonal Structure ◽  
Single Crystalline ◽  
Uv Light Irradiation ◽  
Plane Direction ◽  
Bright Green

Bundle-shaped TbPO4·H2O nanorods have been prepared by a facile hydrothermal technique and characterized by XRD, SEM, TEM, UV-Vis diffuse reflectance spectrum (DRS), photoluminescence (PL) spectrum, and lifetime. The results indicate that the obtained sample has hexagonal structure of TbPO4·H2O and is composed of nanorods bundles which is assembled from many single crystalline nanorods with the diameter of around 45 nm and the length of 2.3 μm. The growth of the single crystalline nanorod is along the (001) plane direction. Under the UV light irradiation, TbPO4·H2O nanorods bundles exhibit bright green emission corresponding to theD54→F7J(J=6,5,4,3) transitions of the Tb3+ions, and the lifetime is determined to be about 0.24 ms.

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