945929-49-7Relevant academic research and scientific papers
High electron mobility in nickel bis(dithiolene) complexes
Cho, Jian-Yang,Domercq, Benoit,Jones, Simon C.,Yu, Junsheng,Zhang, Xiaohong,An, Zesheng,Bishop, Maximilienne,Barlow, Stephen,Marder, Seth R.,Kippelen, Bernard
, p. 2642 - 2647 (2007)
The charge-carrier mobilities for three Ni bis(dithiolene) complexes have been determined using the steady-state space-charge limited current technique. A high mobility of 2.8 cm2 V-1 s-1 was observed for one compound, which exhibits a π-stacked columnar structure, in an annealed unsymmetrical melt-processed device. Energy-level considerations and field-effect transistor measurements suggest that this value represents an electron mobility. However, saturation mobilities measured for this compound in spin-coated field-effect transistors were found to be over two orders of magnitude lower than the space-charge limited current values. X-Ray diffraction shows a difference in morphology between thick melt-processed and thin spin-coated films and, therefore, a significant change in intermolecular packing between the device types may explain the discrepancy in mobilities obtained using the two techniques. The Royal Society of Chemistry.
