molecules. This latter group of materials offers advantages in that characteristics
such as the emission wavelength and sign of the g value can be easily tailored. In
addition, aggregation-induced emission (AIE) [7], first discovered by Tang et al. in
2001, has applications to materials that are capable of light emission in aggregate
form, and can be used in organic LEDs (OLEDs) and cell dyeing agents. These
materials are often measured in thin-film form. However, it is necessary to ensure
that CPL measurements of solid sample are not affected by the artifacts described
above.
Furthermore, recent results concerning the design of CPL materials based on
quantum chemistry calculations, and the subsequent synthesis of such a material [8],
highlight the possibility of a method for developing novel CPL materials that does
not require an empirical approach. Given the wide range of potential applications of
circularly polarized light-emitting materials, the ability to perform CPL measurements in the solid state is highly significant.
0
0.15
560
660
Wavelength [nm]
-10
10
Rotation angle
0°
45°
90°
CPL
[mdeg]
]
t
i
n
U
.
b
r
A
[
L
F
Fig. 14.15 CPL and fluorescence spectra of Eu(facam) 3 in KBr pellet
14 Principles and Applications of Circularly Polarized Luminescence. . .
323
such as the emission wavelength and sign of the g value can be easily tailored. In
addition, aggregation-induced emission (AIE) [7], first discovered by Tang et al. in
2001, has applications to materials that are capable of light emission in aggregate
form, and can be used in organic LEDs (OLEDs) and cell dyeing agents. These
materials are often measured in thin-film form. However, it is necessary to ensure
that CPL measurements of solid sample are not affected by the artifacts described
above.
Furthermore, recent results concerning the design of CPL materials based on
quantum chemistry calculations, and the subsequent synthesis of such a material [8],
highlight the possibility of a method for developing novel CPL materials that does
not require an empirical approach. Given the wide range of potential applications of
circularly polarized light-emitting materials, the ability to perform CPL measurements in the solid state is highly significant.
0
0.15
560
660
Wavelength [nm]
-10
10
Rotation angle
0°
45°
90°
CPL
[mdeg]
]
t
i
n
U
.
b
r
A
[
L
F
Fig. 14.15 CPL and fluorescence spectra of Eu(facam) 3 in KBr pellet
14 Principles and Applications of Circularly Polarized Luminescence. . .
323