Synthesis, crystal structure, and transistor performance of tetracene derivatives.
The substitution of chloro or bromo groups in tetracene gives rise to the change of crystal structure, having a substantial effect on carrier transport. Halogenated tetracene derivatives were synthesized and grown into single crystals. Monosubstituted 5-bromo- and 5-chlorotetracenes have the herringbone-type structure, while 5,11-dichlorotetracene has the slipped pi stacking structure. Mobility of 5,11-dichlorotetracene was measured to be as high as 1.6 cm2/V.s in single-crystal transistors. The pi stacking structure, which enhances pi orbital overlap and facilitates carrier transport, may thus be responsible for this high mobility.
Moon
Hyunsik
H
Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974, USA.
Zeis
Roswitha
R
Borkent
Evert-Jan
EJ
Besnard
Celine
C
Lovinger
Andrew J
AJ
Siegrist
Theo
T
Kloc
Christian
C
Bao
Zhenan
Z