TOM
Tailored Optical
Materials
Phosphor Information Leaflet
GENERAL
Name
Chemical formula
Application areas
Strontium sulfide europium
SrS:Eu2+
Light emitting diodes, cathode ray tubes, EL
Light sources
OPTICAL PROPERTIES
Excitation maxima @ 655 nm
284 nm (≙4.4 eV), 443 nm (≙2.8 eV),
502 nm (≙2.5 eV),
Emission maximum @ 443 nm exc.
Centroid wavelength
Full width @ half emission maximum
Lumen equivalent
CIE1931 chromaticity coordinates (x, y)
Band edge of host lattice
Reflection @ 254 nm
Decay time 1/e
615 nm (≙ 2.01 eV)
627 nm (≙ 1.97 eV)
71 nm
260 lm/W
0.628, 0.371
258 nm (4.8 eV)
13%
1 ms
PHYSICAL PROPERTIES
Body colour
Density
Refractive index (at 589 nm)
orange
3.7 g/cm3
2.107
Halite
Cubic
Fm-3m (225)
Mineral type
Crystal system
Space group (#)
X-ray diffraction pattern (Cu K radiation)
1,0
1,0
0,8
0,8
Intensity [a.u.]
Relative intensity
Emission spectrum (Exc. @ 450 nm)
Excitation spectrum (Em. monitored @ 615 nm)
Reflection spectrum
0,6
0,4
0,6
0,4
0,2
0,2
0,0
0,0
300
400
500
600
Wavelength [nm]
700
800
10
20
30
40
50
2  [°]
60
70
80