Synthesis and Luminescent Properties of Blue Light Emitting Polymers Containing a 4,4' or 3,3'-Linked Biphenyl Unit

2012 ◽  
Vol 13 (6) ◽  
pp. 317-321 ◽  
Author(s):  
Taek Ahn
Keyword(s):  
Blue Light ◽  
Luminescent Properties ◽  
Light Emitting

Synthesis and Luminescent Properties of Strong Blue Light-Emitting Al[sub 2]O[sub 3]/ZnO Nanocables

2008 ◽  
Vol 155 (5) ◽  
pp. K96 ◽  
Author(s):  
Chi-Sheng Hsiao ◽  
Wan-Lin Kuo ◽  
San-Yuan Chen ◽  
Ji-Lin Shen ◽  
Chin-Ching Lin ◽  
...  
Keyword(s):  
Blue Light ◽  
Luminescent Properties ◽  
Light Emitting

scholarly journals Synthesis and Luminescence Properties of a Novel Green-Yellow-Emitting Phosphor BiOCl:Pr3+ for Blue-Light-Based w-LEDs

Molecules ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1296 ◽  
Author(s):  
Qi Wang ◽  
Meiling Xie ◽  
Minghao Fang ◽  
Xiaowen Wu ◽  
Yan’gai Liu ◽  
...  
Keyword(s):  
Blue Light ◽  
High Performance ◽  
Doping Concentration ◽  
Thermal Quenching ◽  
Luminescent Properties ◽  
Solid State Reaction Method ◽  
Exchange Effect ◽  
Light Emitting ◽  
Good Thermal Stability ◽  
Luminescence Efficiency

The development of white-light-emitting diodes (w-LEDs) makes it meaningful to develop novel high-performance phosphors excited by blue light. Herein, BiOCl:Pr3+ green-yellow phosphors were prepared via a high-temperature solid-state reaction method. The crystal structure, luminescent properties, lifetime, thermal quenching behavior, and quantum yield were studied in detail. The BiOCl:Pr3+ phosphors presented several emission peaks located in green and red regions, under excitation at 453 nm. The CIE coordinates could be tuned along with the changed doping concentration with fair luminescence efficiency. The results also indicated that the optimized doping concentration of Pr3+ ions was at x = 0.0075 because of the concentration quenching behavior resulting from an intense exchange effect. When the temperature reached 150 °C, the intensity of the emission peak at 495 nm could remain at 78% of that at room temperature. The activation energy of 0.20 eV also confirmed that the BiOCl:Pr3+ phosphor exhibited good thermal stability. All these results indicate that the prepared products have potential to be used as a high-performance green-yellow-light-emitting phosphor for blue-light-based w-LEDs.

Synthesis and Luminescent Properties of Blue-Emitting Hydrotalcite-Like Compound for NUV Light-Emitting Diodes

2014 ◽  
Vol 1004-1005 ◽  
pp. 340-343
Author(s):  
Chen Hong ◽  
Hui Gao ◽  
Zhao Xuan ◽  
Li Hong Jiang ◽  
Qi Dan Ling
Keyword(s):  
Fluorescence Spectrum ◽  
Blue Light ◽  
Light Emitting Diodes ◽  
Luminescent Properties ◽  
Coprecipitation Method ◽  
White Led ◽  
Hybrid Nanocomposite ◽  
Inorganic Hybrid ◽  
Light Emitting ◽  
Bright Blue

Layered organic-inorganic hybrid nanocomposite material with the hydrotalcite-like structure, containing Mg (II),Zn (II) and Al (III) in the layers, and salicylate ions in the interlayer, have been prepared by a simple coprecipitation method (MgAlZn-sal-HTlc). Fluorescence spectrum, XRD and TG were used to characterize the properties of the sample. Additionally, A LED device was fabricated by coating MgAlZn-sal-HTlc onto InGaN-based LED chip. The device emits bright blue light. All the results indicate that blue-emitting fluorescent hydrotalcite-like compound can act as blue components in the fabrication of white LED.

scholarly journals A Novel Red-Emitting Na2NbOF5:Mn4+ Phosphor with Ultrahigh Color Purity for Warm White Lighting and Wide-Gamut Backlight Displays

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5317
Author(s):  
Jingshan Hou ◽  
Wenxiang Yin ◽  
Langping Dong ◽  
Yang Li ◽  
Yufeng Liu ◽  
...  
Keyword(s):  
Blue Light ◽  
Light Emission ◽  
Light Emitting Diode ◽  
Red Light ◽  
Luminescent Properties ◽  
Fluorescence Decay ◽  
Color Temperature ◽  
Color Purity ◽  
Zero Phonon Line ◽  
Light Emitting

In this work, a novel red-emitting oxyfluoride phosphor Na2NbOF5:Mn4+ with an ultra-intense zero-phonon line (ZPL) was successfully synthesized by hydrothermal method. The phase composition and luminescent properties of Na2NbOF5:Mn4+ were studied in detail. The photoluminescence excitation spectrum contains two intense excitation bands centered at 369 and 470 nm, which match well with commercial UV and blue light-emitting diode (LED) chips. When excited by 470 nm blue light, Na2NbOF5:Mn4+ exhibits red light emission dominated by ZPL. Notably, the color purity of the Na2NbOF5:Mn4+ red phosphor can reach 99.9%. Meanwhile, the Na2NbOF5:Mn4+ phosphor has a shorter fluorescence decay time than commercial K2SiF6:Mn4+, which is conducive to fast switching of images in display applications. Profiting from the intense ZPL, white light-emitting diode (WLED) with high color rendering index of Ra = 86.2 and low correlated color temperature of Tc = 3133 K is realized using yellow YAG:Ce3+ and red Na2NbOF5:Mn4+ phosphor. The WLED fabricated using CsPbBr3 quantum dots (QDs) and red Na2NbOF5:Mn4+ phosphor shows a wide color gamut of 127.56% NTSC (National Television Standard Committee). The results show that red-emitting Na2NbOF5:Mn4+ phosphor has potential application prospects in WLED lighting and display backlight.

Syntheses and Luminescent Properties of Two Blue-Light – Emitting Chelates with Schiff Base Calixarene as Ligands

2003 ◽  
Vol 137 (1-3) ◽  
pp. 1149-1150 ◽  
Author(s):  
Xiao-Qiang WEI ◽  
Zhi-Yun LU ◽  
Ping ZOU ◽  
Ming-Gui XIE
Keyword(s):  
Schiff Base ◽  
Blue Light ◽  
Luminescent Properties ◽  
Light Emitting

scholarly journals Blue-Light-Based White-LEDs based on a Novel Green-Yellow-Emitting Phosphor: Synthesis and Luminescence Properties

2019 ◽  
Author(s):  
Qi Wang ◽  
Meiling Xie ◽  
Minghao Fang ◽  
Xiaowen Wu
Keyword(s):  
Blue Light ◽  
High Performance ◽  
Doping Concentration ◽  
Thermal Quenching ◽  
Luminescent Properties ◽  
Exchange Effect ◽  
Light Emitting ◽  
White Leds ◽  
Good Thermal Stability ◽  
Luminescence Efficiency

The development of white-light-emitting diodes (w-LEDs) makes it meaningful to develop novel high-performance phosphors excited by blue light. Herein, BiOCl:Pr3+ green-yellow phosphors were prepared via a high-temperature solid-state reaction method. The crystal structure, luminescent properties, lifetime, thermal quenching behavior, and quantum yield were studied in detail. The BiOCl:Pr3+ phosphors presented several emission peaks located in green and red regions, under excitation at 453 nm. The CIE coordinates could be tuned along with the changed doping concentration with fair luminescence efficiency. The results also indicated that the optimized doping concentration of Pr3+ ions was at x = 0.0075 because of the concentration quenching behavior resulting from an intense exchange effect. When the temperature reached 150 °C, the intensity of the emission peak at 495 nm could remain at 78% of that at room temperature. The activation energy of 0.20 eV also confirmed that the BiOCl:Pr3+ phosphor exhibited good thermal stability. All these results indicate that the prepared products have potential to be used as a high-performance green-yellow-light-emitting phosphor for blue-light-based w-LEDs.

Synthesis and luminescent properties of a new blue light-emitting phosphor KBa2−xTm x P5O15

2018 ◽  
Vol 15 (5) ◽  
pp. 1069-1074 ◽  
Author(s):  
Ji Zhao ◽  
Dan Zhao ◽  
Ming-Jie Ma ◽  
Zhao Ma ◽  
Bao-Zhong Liu ◽  
...  
Keyword(s):  
Blue Light ◽  
Luminescent Properties ◽  
Light Emitting

Synthesis and Photoluminescence Properties of Two-Bands Excited SrSi2O2N2: Yb2+ Phosphors

2012 ◽  
Vol 430-432 ◽  
pp. 315-318 ◽  
Author(s):  
Xue Wen Xu ◽  
Kun Fu ◽  
Long Hu ◽  
Zun Ming Lu ◽  
Xing Hua Zhang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Blue Light ◽  
White Light ◽  
Light Emitting Diode ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Chemical Compositions ◽  
Photoluminescence Properties ◽  
Light Emitting ◽  
Red Luminescence

The crystal structure and luminescent properties of synthesized SrSi2O2N2: Yb2+ phosphors have been investigated to seek for convention phosphor for white light-emitting diode applications. The Sr1-xYbxSi2O2N2 phosphors have yellow-red luminescence under the exciting of blue light, which is attributed to the 4fn↔4fn-15d transitions of Yb2+. Although the chemical compositions for Sr1-xYbxSi2O2N2 materials are different, no shifts are observed from the excitation and emission spectra.

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