High-performance single crystal organic field-effect transistors based on two dithiophene-tetrathiafulvalene (DT-TTF) polymorphs.
Solution prepared single crystal organic field-effect transistors (OFETs) combine low-cost with high performance due to structural ordering of molecules. However, in organic crystals polymorphism is a known phenomenon, which can have a crucial influence on charge transport. Here, the performance of solution-prepared single crystal OFETs based on two different polymorphs of dithiophene-tetrathiafulvalene, which were investigated by confocal Raman spectroscopy and X-ray diffraction, are reported. OFET devices prepared using different configurations show that both polymorphs exhibited excellent device performance, although the -phase revealed charge carrier mobility between two and ten times higher in accordance to the closer stacking of the molecules.
Pfattner
Raphael
R
Institut de Ciencia de Materials de Barcelona, Bellaterra, Spain.
Mas-Torrent
Marta
M
Bilotti
Ivano
I
Brillante
Aldo
A
Milita
Silvia
S
Liscio
Fabiola
F
Biscarini
Fabio
F
Marszalek
Tomasz
T
Ulanski
Jacek
J
Nosal
Andrzej
A
Gazicki-Lipman
Maciej
M
Leufgen
Michael
M
Schmidt
Georg
G
Molenkamp
Laurens W
LW
Laukhin
Vladimir
V
Veciana
Jaume
J
Rovira
Concepció
C
D003460:Crystallization; D006571:Heterocyclic Compounds / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D013876:Thiophenes / Q000737:chemistry*; D014173:Transistors, Electronic; D014961:X-Ray Diffraction
D006571:Heterocyclic Compounds; D013876:Thiophenes; C063887:tetrathiafulvalene