A red phosphor of Ba3In2F12:Mn4+ with enhanced moisture stability for warm WLED application

As a highly productive narrow-band emission red phosphor, K2SiF6:Mn4+ has towardly application market in pc-WLEDs (Phosphor-converted white light-emitting diodes) and LCD (Liquid crystal display). However, the poor moisture resistance property is recognized impediment for generalizing its wider commercialization. Herein, we adopt a simply green and convenient strategy based on Fe2+, which is committed to decreasing the reaction between luminescence center and water. The K2SiF6:Mn4+ as expected exhibits highly efficient red emission upon excitation.

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Single-electron sensitivity with a lens-coupled CCD camera

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100149040 ◽

1993 ◽

Vol 51 ◽

pp. 642-643

Author(s):

G.Y. Fan ◽

Bruce Mrosko ◽

Mark H. Ellisman

Keyword(s):

Focal Length ◽

Thick Layer ◽

Ccd Camera ◽

Single Electron ◽

Bottom Flange ◽

X Rays ◽

Red Phosphor ◽

Ccd Detector ◽

Lens Assembly ◽

Efficient Coupling

A lens coupled CCD camera showing single electron sensitivity has been built for TEM applications. The design is illustrated in Fig. 1. The bottom flange of a JEM-4000EX microscope is replaced by a special flange which carries a large rectangular leaded glass window, 22 mm thick. A 20 μm thick layer of red phosphor is coated on the window, and the entire window is sputter-coated with a thin layer of Au/Pt. A two-lens relay system is used to provide efficient coupling between the image on the phosphor scintillator and the CCD imager. An f1.0 lens (Goerz optical) with front focal length 71.6 mm is used as the collector. A mirror prism, of the Amici type, is used to "bend" the optical path by 90° to prevent X-rays which may penetrate the leaded glass from hitting the CCD detector. Images may be relayed directly to the camera (1:1) or demagnified by a factor of up to 3:1 by moving the lens assembly.

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Functionalized Ionic Liquid-Crystal Additive for Perovskite Solar Cells with High Efficiency and Excellent Moisture Stability

ACS Applied Materials & Interfaces ◽

10.1021/acsami.1c02728 ◽

2021 ◽

Author(s):

Xuefeng Xia ◽

Jiayi Peng ◽

Qixin Wan ◽

Xiaofeng Wang ◽

Zhiping Fan ◽

...

Keyword(s):

Ionic Liquid ◽

Solar Cells ◽

Liquid Crystal ◽

High Efficiency ◽

Perovskite Solar Cells ◽

Functionalized Ionic Liquid ◽

Moisture Stability

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A novel near-ultraviolet-light excitable Eu3+-doped Sr2LaTaO6 red phosphor for white-light-emitting diodes

Optik ◽

10.1016/j.ijleo.2021.166908 ◽

2021 ◽

Vol 240 ◽

pp. 166908

Author(s):

Qifeng Tang ◽

Tao Yang ◽

Haifeng Huang ◽

Jinqing Ao ◽

Biyou Peng ◽

...

Keyword(s):

Ultraviolet Light ◽

White Light ◽

Light Emitting Diodes ◽

Red Phosphor ◽

Light Emitting ◽

Near Ultraviolet ◽

White Light Emitting Diodes

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Enhanced luminescence performances of Sr2YTaO6:Mn4+ narrow red phosphor by Rn+ (Li+,Na+,Ca2+,Mg2+) ions

Journal of Luminescence ◽

10.1016/j.jlumin.2021.118030 ◽

2021 ◽

Vol 235 ◽

pp. 118030

Author(s):

Zaifa Yang ◽

Hongxia Bu ◽

Fenghua Zhang ◽

Chen Fang ◽

Jingfen Zhao ◽

...

Keyword(s):

Red Phosphor ◽

Enhanced Luminescence

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Fabrication and Properties of Zinc Silicate Phosphors through Solid State Reaction

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.160-162.594 ◽

2010 ◽

Vol 160-162 ◽

pp. 594-598

Author(s):

Guo Jian Jiang ◽

Jia Yue Xu ◽

Hui Shen ◽

Yan Zhang ◽

Lin He Xu ◽

...

Keyword(s):

Solid State ◽

Solid State Reaction ◽

Solid State Reaction Method ◽

Emission Peak ◽

Zinc Silicate ◽

Red Phosphor ◽

Reaction Method ◽

Long Afterglow ◽

Luminescent Mechanism ◽

Silicate Phosphors

Zinc silicate-based (Zn2SiO4:Eu3+) long afterglow phosphors were produced by solid state reaction method. The effects of borax and Eu2O3 additive on the properties of fabricated products have been studied. The results show that, there is not much difference in phase compositions within the borax additive amount; however, their SEM morphologies are different. Borax additive can increase the grain size of the product. Some sintering phenomena could be observed in the sample with Eu2O3 addition. The fluorescence spectroscopy results indicate that, the emission peak of the sample with Eu3+ additive located at 612nm, which may be a good candidate for red phosphor applications. The luminescent mechanism of Zn2SiO4:Eu3+ is also discussed.

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