期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 2, 期 26, 页码 5149-5154出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4tc00390j
关键词
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资金
- European Commission [FP7-287568]
- DFG [1355]
- DFG within the German Excellence Initiative via the Cluster of Excellence EXC 1056 Center for Advancing Electronics Dresden (cfAED)
- KAU
The semiconducting properties of a bithiophene-naphthalene diimide copolymer (PNDIT2) prepared by Ni-catalyzed chain-growth polycondensation (P1) and commercially available N2200 synthesized by Pdcatalyzed step-growth polycondensation were compared. Both polymers show similar electron mobility of similar to 0.2 cm(2) V-1 s(-1), as measured in top-gate OFETs with Au source/drain electrodes. It is noteworthy that the new synthesis has several technological advantages compared to traditional Stille polycondensation, as it proceeds rapidly at room temperature and does not involve toxic tin-based monomers. Furthermore, a step forward to fully printed polymeric devices was achieved. To this end, transistors with PEDOT: PSS source/drain electrodes were fabricated on plastic foils by means of mass printing technologies in a roll-to-roll printing press. Surface treatment of the printed electrodes with PEIE, which reduces the work function of PEDOT: PSS, was essential to lower the threshold voltage and achieve high electron mobility. Fully polymeric P1 and N2200-based OFETs achieved average linear and saturation FET mobilities of > 0.08 cm(2) V-1 s(-1). Hence, the performance of n-type, plastic OFET devices prepared in ambient laboratory conditions approaches those achieved by more sophisticated and expensive technologies, utilizing gold electrodes and time/energy consuming thermal annealing and lithographic steps.
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