Thermally stable blue emitting terfluorene block copolymers.
Spectroscopic and morphological studies on a series of rod-coil block copolymers containing terfluorene segments as the rigid blocks and polystyrene as the flexible parts demonstrate an increase in the photoluminescence intensity and the exciton lifetime as well as formation of isolated spheres as thin films upon thermal annealing in air (200 degrees C for 30 min). Moreover, no appearance of the low energy emission band centered at 520 nm was found after the same thermal treatment which permits these copolymers to emit pure blue light.
Chochos
Christos L
CL
Foundation for Research and Technology Hellas, Institute of Chemical Engineering and High-Temperature Processes (FORTH-ICEHT), P.O. Box 1414, Patras 26500, Greece.
Kallitsis
Joannis K
JK
Keivanidis
Panagiotis E
PE
Baluschev
Stanislav
S
Gregoriou
Vasilis G
VG