Organic Semiconductor ChemistryThu, Dec 13, 2012, 3pm / 36-428
School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta
Organic semiconductors have attracted interest for electronic applications due to their potential for use in low-cost, large-area, flexible electronic devices. While many examples of organic semiconductors for p-channel and n-channel organic field-effect transistors (OFETs) and organic photovoltaic systems (OPVs) have been reported in the recent literature, there is a paucity of high-performance, solution-processable, small-molecule electron transport materials. Here, we report that bis(NDI) derivatives with conjugated bridging groups based on fused heterocycle ring systems can be used to create solution-processed films that exhibit OFET electron mobility values of up to 1.5 cm2V–1s–1, which is among the highest yet reported for an n-channel OFET based on a solution-processed small molecule. In addition we will discuss the development of metal complexes that can be used to both n-dope or p-dope organic semiconductors and the use of surface modifiers to vary the work function of electrodes for use in optoelectronic applications.