Organic solvent-assisted synthesis of the K3SiF7:Mn4+ red phosphor with improved morphology and stability

2019 ◽  
Vol 7 (47) ◽  
pp. 15014-15020 ◽  
Author(s):  
Minhee Noh ◽  
Dae Ho Yoon ◽  
Chang Hae Kim ◽  
Seon Joo Lee
Keyword(s):  
Organic Solvent ◽  
Synthetic Method ◽  
Red Phosphor ◽  
Enhanced Stability

Our organic solvent-assisted synthetic method provides a simple and very effective way to produce a uniform K3SiF7:Mn4+ phosphor with enhanced stability.

Light Conversion by Size Control of Inorganic Phosphors

2009 ◽  
Vol 620-622 ◽  
pp. 699-702
Author(s):  
In Churl Cho ◽  
Yong Kap Park ◽  
Yong Choi
Keyword(s):  
Electron Microscopy ◽  
Size Control ◽  
Spherical Shape ◽  
Ultraviolet Rays ◽  
Synthetic Method ◽  
Red Phosphor ◽  
Blue Phosphor ◽  
Infrared Rays ◽  
Unique Method

A unique method, so called, hydro-thermal synthetic method was applied to produce nano-sized inorganic blue (Y2SiO5:Ce) and red (Y2O2S:Eu+3) emitting phosphors. Electron microscopy revealed that the nano-sized emitting phosphor particles have spherical shape with 23-50nm in size. The particles can effectively change ultraviolet rays of 1-390 nm to infrared rays of 750nm -1mm, which are suitable to promote the growth of plants. The principle excitation and emitting spectrum of the red phosphor in 590-700 nm emitting spectrum were in the region of 308nm and 617nm, respectively, whereas, those of the blue phosphor in 420-470nm emitting spectrum were in the region of 254nm and 464nm, respectively. The addition of 0.1-0.2 wt% of the 2:1 mixed red and blue powders to a film showed the maximum emitting intensity of 537x1000 count/sec.

An Efficient Synthetic Method of N-Protected Dipeptide Acids Using Amino Acid Calcium Carboxylates in an Organic Solvent

Synlett ◽  
2011 ◽  
Vol 2011 (10) ◽  
pp. 1427-1430 ◽  
Author(s):  
Chikao Hashimoto ◽  
Kazunobu Takeguchi ◽  
Mitsuo Kodomari
Keyword(s):  
Amino Acid ◽  
Organic Solvent ◽  
Synthetic Method

Hydrolysis of Titanium Alkoxide in Organic Solvent at High Temperatures:  A New Synthetic Method for Nanosized, Thermally Stable Titanium(IV) Oxide

1999 ◽  
Vol 38 (10) ◽  
pp. 3925-3931 ◽  
Author(s):  
Hiroshi Kominami ◽  
Masaaki Kohno ◽  
Yoko Takada ◽  
Masashi Inoue ◽  
Tomoyuki Inui ◽  
...  
Keyword(s):  
Organic Solvent ◽  
High Temperatures ◽  
Synthetic Method ◽  
Titanium Alkoxide ◽  
Thermally Stable ◽  
Hydrolysis Of

Enhanced stability and separation efficiency of graphene oxide membranes in organic solvent nanofiltration

2018 ◽  
Vol 6 (40) ◽  
pp. 19563-19569 ◽  
Author(s):  
Tiantian Gao ◽  
Haibo Wu ◽  
Lei Tao ◽  
Liangti Qu ◽  
Chun Li
Keyword(s):  
Graphene Oxide ◽  
Organic Solvent ◽  
Separation Efficiency ◽  
Term Stability ◽  
Long Term Stability ◽  
Organic Solvent Nanofiltration ◽  
Oxide Membranes ◽  
Enhanced Stability ◽  
Graphene Oxide Membranes

GO–BA membranes exhibited excellent nanofiltration performances and long-term stability for OSN with the assistance of BA polymers.

Single-electron sensitivity with a lens-coupled CCD camera

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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