Light-emitting organic field-effect transistors

C. Rost, S. Karg, W. Riess, M. A. Loi, M. Murgia and M. Muccini, Ambipolar light-emitting organic field-effect transistor, AppZ. Phys. Lett., 85, 1613-1615 (2004). 

T. Sakanoue, M. Yahiro, C. Adachi, H. Uchiuzou, T. Takahashi and A. Toshimitsu, Ambipolar light-emitting organic field-effect transistors using a wide-band-gap blue-emitting small molecule, Appl. Phys. Lett, 90, 171118 (2007). 

Thermally and mechanically stable thin film formation is indispensable for fabrication of practical electronic devices such as organic light-emitting diodes, field-effect transistors, and particularly for flexible electronic papers. There are two approaches for formation of thermally and mechanically stable thin films. One is formation of glassy semiconductors retaining ordered structures by cooling from liquid-crystalline states [94]. The other approach is polymerization of liquid-crystalline semiconductors with a reactive moiety. 

In modem history, particularly in the recent decades, liquid crystals (LCs) have become a very important class of materials. Since the first invention of LC display (LCD), LCs have become the quintessential materials in information displays such as TVs, computer monitors, and digital displays. In the recent development of LC materials, LCs have moved rapidly beyond display applications and are evolving into entirely new scientific frontiers, opening broad avenues for versatile applications such as lasers, photovoltaics, light-emitting diodes, field effect transistors, biosensors, switchable windows, and nanophotonics [1]. AU these applications benefit from LC s unique properties, e.g. self-organization and being able to... 

Silicon-bridged biaryls (SBArs) have attracted growing attention in the fields of functional organic materials such as light-emitting diodes, field-effect transistors, and solar cells. The conventional synthesis of SBArs always involves dilithiation of the corresponding 2,2 -dihalobiaryls with dichlorosilanes. However, this protocol is limited to symmetrical substrates in most cases. 

As a class of n-type organic semiconductors, PBI derivatives have received considerable attention for a variety of applications [312, 313], for example, for organic or polymer light-emitting diodes (OLEDs and PLEDs) [314, 315], thin-film organic field-effect transistors (OFETs) [316, 317], solar cells [318, 319], and liquid crystals [320]. They are also interesting candidates for single-molecule device applications, such as sensors [321], molecular wires [322], or transistors [141]. 

---