<s>
Poly(p-phenylene vinylene )	O
(	O
PPV	O
,	O
or	O
polyphenylene	B-Architecture
vinylene	I-Architecture
)	O
is	O
a	O
conducting	B-Algorithm
polymer	I-Algorithm
of	O
the	O
rigid-rod	O
polymer	O
family	O
.	O
</s>
<s>
Although	O
solid-state	O
lasing	O
has	O
yet	O
to	O
be	O
demonstrated	O
in	O
an	O
organic	B-Device
LED	I-Device
,	O
poly[2-methoxy-5-( 2’-ethylhexyloxy	O
)	O
-p-phenylene	O
vinylene ]	O
(	O
MEH-PPV	O
)	O
has	O
been	O
proven	O
to	O
be	O
a	O
promising	O
laser	O
dye	O
due	O
to	O
its	O
high	O
fluorescence	O
efficiency	O
in	O
solution	O
.	O
</s>
<s>
Polyphenylene	B-Architecture
vinylene	I-Architecture
is	O
electroluminescent	O
,	O
suggesting	O
applications	O
in	O
polymer-based	O
organic	B-Device
light	I-Device
emitting	I-Device
diodes	I-Device
.	O
</s>
