Organic semiconductor N-channel

Ling MM, Erk P, Gomez M, Koenemann M, Locklin J, Bao ZN (2007) Air-stable n-channel organic semiconductors based on perylene diimide derivatives without strong electron withdrawing groups. Adv Mater 19 1123... 

C. R. Newman, C. D. Flisbie, D. A. da Silva Filho, J. L. Bredas, P. C. Ewbank, and K. R. Mann, Introduction to organic thin film transistors and design of n-channel organic semiconductors, Chemistry of Materials, 16, 4436, 2004. 

An n-channel organic semiconductor. Emission intensity Aabs 275-400 nm Xan 400-550 nm. Shows an and number of bands is dependent on the solvent, as such easily detected long lived green [riic [riicn escence in... 

UV-visible spectral measurements show that substituted indolo[ 3,2-ib] carbazoles (5) absorb significantly below 450 nm (Fig. 4.12). Their band gaps in the solid state, estimated from the on-set UV-visible absorption, were >2.55 eV, which are significantly larger than those of most p-channel organic semiconductors for OTFTs (Table 4.1). In addition, whereas chlorine substitution at the 3,9 positions of 5,ll-dialkylindolo[3,2-jb]carbazole (i.e. 5d) did not cause noticeable changes in the spectral properties, substitution at the 2,8 positions (i.e. 5c) results in red-shifts in both solution and thin film absorption - a phenomenon that clearly indicates the pronounced electronic effects of substituents at positions para to the radical cation sites (5-N and 11-N positions). 

Fig. 10.23. The frame on the left shows current-voltage characteristics of an n-channel transistor formed with electrodes patterned by nanotransfer printing. Laminating these electrodes against a substrate (PET) that supports an organic semiconductor (FCuPc), a gate dielectric (GR) and a gate (ITO)...

Design, Synthesis, and Transistor Performance of Organic Semiconductors 199 Thiophene-based N-Channel Oligomers (49a-49q)... 

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