Columbia ISA - Audio & Video
Television
CRT Phosphors
CRT phosphors are specific chemical compounds which are luminescent and are arranged on the inside of the TV tube in a certain order and are available in various colors, starting with basic red, green and blue for color CRTs, with precise grain size control, dispersion control and surface treatment to match exact tube specifications. 

When excited by a scanning electron beam in the CRT, the phosphors will glow momentarily until refreshed again (many times per second) forming a picture composed of colors by utilizing the red, green and blue combinations. If you look at your TV screen (while it is turned on) with a magnifying glass, you can see the colored elements. Over many years of use, the phosphors will gradually fade in brilliance and the color of your TV screen will lose its original richness.

   Chemical compounds of phosphors
Red Phosphor (europium yttrium vanadate)
Green Phosphor (zinc cadmium sulfide)
Blue Phosphor (zinc sulfide)
TV display screens
CRT Phosphors2
magnified CRT screen


CRT electron gun 'paints' the picture on the screen many times per second
 
Category
Color (JEDEC RMA Number)
Chemical Composition
Color CRT
Blue (P-22B)
ZnS:Ag
Blue (P-22B)
ZnS:Ag+Pigment
Green (P-22G)
ZnS:Cu,Al
Green (P-22G)
ZnS:Cu,Au,Al
Red (P-22R)
Y2O2S:Eu
Red (P-22R)
Y2O2S:Eu+Pigment
 
Oher phosphors
Phosphors are also widely used in applications such as those listed below.
 
Category
Color
Chemical Composition
EL Panels
Blue-Green
ZnS:Cu
Green
ZnS:Cu
Orange
ZnS:Cu,Mn
X-Ray Intensifying Screens
 
Gd2O2S:Tb
Printing
Blue
ZnS:Ag
Green
ZnS:Cu
Orange
ZnS:Mn

Luminescent Materials
CRT Phosphors - P22 Color - EIA Registered

NP #
Composition WTDS/EIA S.G. Emission Peak (nm)/Color Decay (1/10) Notes
NP-2111
ZnS:Ag,Cl
(non-pigmented)
X/P22 4.07
450 Blue
MS
-
NP-2112
ZnS:Ag,Cl
(pigmented)
X/P22 4.07
450 Blue
MS
-
NP-2121
ZnS:Ag,Al
(non-pigmented)
X/P22 4.07
450 Blue
MS
-
NP-2122
ZnS:Ag,Al
(pigmented)
X/P22 4.07
450 Blue
MS
-
NP-2211
ZnS:Cu,Al X/P22,DB/P54 4.10
530 Green
MS
Cu Green
NP-2221
ZnS:Cu,Au,Al X/P22 4.10
535 Green
MS
Au Green
NP-2311
Y2O2S:Eu
(non-pigmented)
X/P22,DB/P54 4.95
626 Red
M
-
NP-2312
Y2O2S:Eu
(pigmented)
X/P22 4.95
626 Red
M
-

ZnS = Zinc sulfide, Ag = Silver, Cl = Chlorine, Cu = Copper, Al= Aluminum, Au = Gold

NP #
Composition WTDS/EIA S.G. Emission Peak (nm)/Color Decay (1/10) Notes
NP-1001
Zn2SiO4:Mn GJ/P1 4.13
525
M
Display Tubes
NP-1004
ZnS:Ag + (Zn,Cd)S:Cu WW/P4
-
White
MS
B&W Tubes, Display Tubes
NP-1011
ZnS:Ag,Cl or ZnS:(Zn) BE/P11 4.07
460
MS
Display Tubes, Vacuum Fluorescent Display
NP-1019
(KF,MgF2):Mn LF/P19 3.14
590
L
Radar Screen
NP-1020
(Zn,Cd)S:Ag or (Zn,Cd)S:Cu KA/P20 4.13
Yellow
M
Display Tubes
NP-1024
ZnO:Zn GE/P24 5.60
505
S
Vacuum Fluorescent Display
NP-1026
(KF,MgF2):Mn LC/P26 3.14
595
VL
Radar Screen
NP-1028
(Zn,Cd)S:Cu,Cl KE/P28
-
Yellow
M
Display Tubes
NP-1031
ZnS:Cu or ZnS:Cu,Ag GH/P31 4.10
Yellowish-Green
MS
Oscilloscopes for Printing
NP-1033
MgF2:Mn LD/P33 3.14
590
VL
Radar Screen
NP-1038
(Zn,Mg)F2:Mn LK/P38 3.14
590
VL
Radar Screen
NP-1039
Zn2SiO4:Mn,As GR/P39 4.20
525
L
Display Tubes
NP-1040
ZnS:Ag + (Zn,Cd)S:Cu GA/P40
-
White
L
Display Tubes
NP-1043
Gd2O2S:Tb GY/P43 7.50
545
M
Display Tubes
NP-1045
Y2O2S:Tb WB/P45 4.95
545 White
M
View Finder
NP-1045
Y2O2S:Tb
-
4.95
545 Green
M
Display Tubes
NP-1046
Y3Al5O12:Ce KG/P46 4.15
530
VS
Beam Index Tubes
NP-1046A
Y3(Al,Ga)5O12:Ce
-
4.96
520
VS
Beam Index Tubes
NP-1047
Y2SiO5:Ce BH/P47 4.36
400
VS
Beam Index Tubes
NP-1053
Y3Al5O12:Tb KJ/P53 4.74
544
M
Projection Tubes
NP-1053A
Y3(Al,Ga)5O12:Tb
-
5.15
544
M
Projection Tubes
NP-1055
ZnS:Ag,Al BM/P55 4.07
450
MS
Projection Tubes
NP-1056
Y2O3:Eu X/P22,RF/P56 5.05
611
M
Projection Tubes

CRT Phosphors - Others

NP #
Composition S.G. Emission Peak (nm)/Color Decay (1/10) Notes
NP-1101
InBO3:Tb 5.47
550
M
-
NP-1102
InBO3:Eu 5.47
588
M
-
NP-1104
ZnS:Ag 4.07
450
MS
-
NP-1108
ZnS:Cu,Al or ZnS:Cu,Au,Al 4.07
530
MS
-
NP-1109
ZnS:Ag
-
450
MS
-
NP-1150
Y2SiO5:Tb 4.43
545
M
Projection Tubes
NP-1201
(Zn,Cd)S:Cu,Cl + (Zn,Cd)S:Ag,Cl
-
White
M
-
NP-1291
InBO3:Tb + InBO3:Eu
-
Amber
M
-
NP-1305
ZnS:Ag + ZnS:Cu(or ZnS:Cu,Au) + Y2)2S:Eu
-
White
M
Cd free P4, B&W Tubes, Display Tubes
NP-1381
InBO3:Tb + InBO3:Eu + ZnS:Ag
-
White
M
-


PHOSPHORS FOR CATHODE RAY TUBES
 
TEPAC-WW CHEMICAL COMPOSITION MEDIAN PARTICLE SIZE (?m)
      
P1-GK Zn2SiO4:Mn 8.0
P1-GK Zn2SiO4:Mn 3.0
P5-BJ CaWO4 8.0
P7-YX (Zn,Cd)S:Cu 12.0
P11-BE ZnS:Ag 6.5
P11-BE ZnS:Ag 3.0
P15-GG ZnO:Zn 4.0
P19-LF KMgF3:Mn 8.0
P20-KA (Zn,Cd)S:Ag 8.0
P20-KA (Zn,Cd)S:Ag 3.5
P20-KA (Zn,Cd)S:Ag 2.1
P22-X (R) Y2O2S:Eu 7.5
P22-X (R) YVO4:Eu 5.0
P22-X (G) ZnS:Cu,Au,Al 8.0
P22-X (B) ZnS:Ag 8.0
P25-LJ CaSiO3:Mn,Pb 8.0
P26-LC KMgF3:Mn 8.0
P31-GH ZnS:Cu 10.0
P33-LD MgF2:Mn 9.0
P38-LK (Zn,Mg)F2:Mn 8.5
P39-GR Zn2SiO4:Mn, As 7.5
P39-GR Zn2SiO4:Mn, In 6.0
P43-GY Gd2O2S:Tb 8.5
P43-GY Gd2O2S:Tb 3.5
P43-GY Gd2O2S:Tb 2.5
P44-GX La2O2S:Tb 7.0
P45-WB Y2O2S:Tb 7.5
P45-WB Y2O2S:Tb 3.5
P45-RED-ENH Y2O2S:Tb,Eu 5.0
P45-RED-ENH Y2O2S:Tb,Eu 3.5
P45-RED-ENH Y2O2S:Tb,Eu 2.5
P46-KG Y3Al5O12:Ce 6.0
P46-KG Y3Al5O12:Ce 3.0
P46(Ga) Y3(Al,Ga)5O12:Ce 5.7
P46(Ga) Y3(Al,Ga)5O12:Ce 2.5
P47-BH Y2SiO5:Ce 6.5
P47-BH Y2SiO5:Ce 3.0
P47-BH Y2SiO5:Ce 2.0
P48-KH (P46+P47 BLEND) 6.0
P53(Ga) Y3(Al,Ga)5O12:Tb 8.5
P53(Ga) Y3(Al,Ga)5O12:Tb 3.5
P53(Ga) Y3(Al,Ga)5O12:Tb 2.5
P56-RF Y2O3:Eu 6.0
P56-RF Y2O3:Eu 3.5

Compounds of zinc:

zinc (II) sulphide

Synonyms

Physical properties

Element analysis.

Element

%

S 32.90
Zn 67.10

TV Screens