Intense violet-blue photoluminescence in as-deposited amorphous Si:H:O films

1997 ◽  
Vol 71 (5) ◽  
pp. 698-700 ◽  
Author(s):  
Song Tong ◽  
Xiang-na Liu ◽  
Ting Gao ◽  
Xi-mao Bao
Keyword(s):  
Blue Photoluminescence

Blue photoluminescence of α-Ga2S3 and α-Ga2S3:Fe2+ single crystals

2003 ◽  
Vol 83 (10) ◽  
pp. 1947-1949 ◽  
Author(s):  
Chang-Sun Yoon ◽  
F. D. Medina ◽  
L. Martinez ◽  
Tae-Young Park ◽  
Moon-Seog Jin ◽  
...  
Keyword(s):  
Single Crystals ◽  
Blue Photoluminescence

Strong blue photoluminescence from as-fabricated amorphous-Si:H∕SiO2 multilayers

2004 ◽  
Vol 85 (4) ◽  
pp. 516-518 ◽  
Author(s):  
Zhongyuan Ma ◽  
Kunji Chen ◽  
Xinfan Huang ◽  
Jun Xu ◽  
Wei Li ◽  
...  
Keyword(s):  
Blue Photoluminescence

Synthesis, Photoluminescence and Bio-Targeting Applications of Blue Graphene Quantum Dots

2016 ◽  
Vol 16 (4) ◽  
pp. 3457-3467 ◽  
Author(s):  
Jigang Wang ◽  
Ji Zhou ◽  
Wenhua Zhou ◽  
Jilong Shi ◽  
Lun Ma ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Sodium Hydroxide ◽  
Heating Temperature ◽  
Thin Sheet ◽  
Graphene Quantum Dots ◽  
Photoluminescence Intensity ◽  
Cytotoxic Effects ◽  
Different Temperatures ◽  
Blue Photoluminescence

Chemical derived graphene oxide, an atomically thin sheet of graphite with two-dimensional construction, offers interesting physical, electronic, thermal, chemical, and mechanical properties that are currently being explored for advanced physics electronics, membranes, and composites. Herein, we study graphene quantum dots (GQD) with the blue photoluminescence under various parameters. The GQD samples were prepared at different temperatures, and the blue photoluminescence intensity of the solution improved radically as the heating temperatures increased. Concerning PL peak and intensity of the quantum dots, the results demonstrated dependence on time under heating, temperature of heating, and pH adjusted by the addition of sodium hydroxide. After hydrothermal synthesis routes, the functional groups of graphene oxide were altered the morphology showed the stacking configuration, and self-assembled structure of the graphene sheets with obvious wrinkles appeared at the edge structures. In addition, absorption, PL, and PLE spectra of the graphene quantum dots increase with different quantities of sodium hydroxide added. Finally, using GQD to target PNTIA cells was carried out successfully. High uptake efficiency and no cytotoxic effects indicate graphene quantum dots can be suitable for bio-targeting.

Luminescence Intensity Enhancement of Copper Doped Hydronium Alunite Synthesized under Hydrothermal Conditions Using Sulfates Solution

2014 ◽  
Vol 90 ◽  
pp. 127-132
Author(s):  
Yuichiro Kuroki ◽  
Takashi Hatsuse ◽  
Tomoichiro Okamoto ◽  
Masasuke Takata
Keyword(s):  
Crystal Structure ◽  
Luminescence Intensity ◽  
Single Phase ◽  
Elemental Sulfur ◽  
Nitrate Solution ◽  
Hydrothermal Condition ◽  
Copper Nitrate ◽  
Hydrothermal Conditions ◽  
Photoluminescence Peak ◽  
Blue Photoluminescence

A novel phosphor, copper doped hydronium alunite ((H3O)Al3(SO4)2(OH)6:Cu), exhibiting a blue photoluminescence peak at a wavelength of 420 nm was successfully synthesized from aluminum and copper sulfates solution under hydrothermal condition (240 °C, 60 min). The measurement of XRD revealed that the obtained products were single phase with a crystal structure of (H3O)Al3(SO4)2(OH)6. Luminescence intensity of (H3O)Al3(SO4)2(OH)6:Cu synthesized from sulfates solution was 6.2 times higher than that from an aluminum nitrate solution mixed with an elemental sulfur and a copper nitrate solution. The increase of luminescence intensity was resulted from an improvement of the crystallinity of (H3O)Al3(SO4)2(OH)6.

scholarly journals The blue photoluminescence from rare earths-doped porous silicon

2004 ◽  
Vol 53 (5) ◽  
pp. 1562
Author(s):  
Peng Ai-Hua ◽  
Xie Er-Qing ◽  
Jia Chang-Wen ◽  
Jiang Ran ◽  
Lin Hong-Feng ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Rare Earths ◽  
Blue Photoluminescence

MICROSTRUCTURE AND BLUE PHOTOLUMINESCENCE OF HYDROGENATED SILICON CARBONITRIDE THIN FILMS

2019 ◽  
Vol 26 (04) ◽  
pp. 1850177 ◽  
Author(s):  
YINQIAO PENG ◽  
JICHENG ZHOU ◽  
GUIBIN LEI ◽  
YUANJU GAN ◽  
YUEFENG CHEN
Keyword(s):  
Thin Films ◽  
Network Structure ◽  
Energy Dispersive Spectrometer ◽  
Silicon Carbonitride ◽  
X Ray Diffraction ◽  
Hydrogenated Silicon ◽  
X Ray ◽  
Atomic Force ◽  
Scanning Electron ◽  
Blue Photoluminescence

Hydrogenated silicon carbonitride (SiCN:H) thin films were deposited by sputtering of silicon carbide target in hydrogen-doped argon and nitrogen atmospheres. The properties of the SiCN:H films were analyzed by scanning electron microscopy with energy dispersive spectrometer, atomic force microscope, Fourier transform infrared spectroscopy, X-ray diffraction and fluorescence spectrophotometer. No distinct crystal was formed in the SiCN:H films as-deposited and annealed at 600∘C and 800∘C. The SiCN:H films were mainly composed of Si–N, Si–C, Si–O, C–C, C–N, C[Formula: see text]N, N–Hn bonds and SiCxNy network structure. The strong blue photoluminescence observed from the SiCN:H film annealed at 600∘C was attributed to SiCxNy network structure.

Morphology and Blue Photoluminescence Emission of PbMoO4 Processed in Conventional Hydrothermal

2009 ◽  
Vol 113 (14) ◽  
pp. 5812-5822 ◽  
Author(s):  
J. C. Sczancoski ◽  
M. D. R. Bomio ◽  
L. S. Cavalcante ◽  
M. R. Joya ◽  
P. S. Pizani ◽  
...  
Keyword(s):  
Photoluminescence Emission ◽  
Blue Photoluminescence
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