An active area of research has been the fabrication of large area nano-structures arrays of organic semiconductors for applications in field emission cold cathode. Recently, the researchers of Key Laboratory of Organic Solids have successfully fabricated the metal-organic charge transfer complexes of large area Cu-TCNAQ nanostructure arrays and discovered the remarkable field emission performance. They utilized a facile way to synthesize the Cu-TCNAQ complexes on the surface of Cu and controllable growth of large-area nanosturctured Cu-TCNAQ arrays films. Interestingly, they found tuning the growth parameters can significantly affect the morphologies of the resulting Cu-TCNAQ films. The nanowall array has shown excellent field emission performance with high current density and low turn-on field indicating the potential applications of organic charge-transfer complexes in field emission flat displays..

They also fabricated the large area nanorods array of κ-(BEDT-TTF)₂Cu(SCN)₂ and TTF-TCNQ by organic liquid-phase reactions combination of low temperature process. An extension concept of association of adsorption and complexation is used for construction of large area ZnO-PPV nanorods array (4 cm²). They have studied the piezoelectrical properties of ZnO-OPV nanostructures by collaboration with Prof. Zhonglin Wang (School of Materials Science and Engineering, Georgia Institute of Technology). The material exhibit outstanding p-n junction effect to controls the flow of current between OPV and ZnO serves as a “diode”.

These results were published in Adv. Mater. 2008, 20, 309-313, J. Phys. Chem. C 2007, 111, 3544-3547, Nanotechnology 2007, 18, 145706 和 Nano Lett. 2008, 8, 203-207.

Advanced Materials., 2008, 20, 309-313

Large-area nanowires and nanowalls of Cu-TCNAQ and their field emission properties, the nanorod arrays of κ-(BEDT-TTF)₂Cu(SCN)₂.