Development of high-performance n-type organic thin-film transistors using a small-molecule polymer blend

作者：Amegadze Paul S K; Noh Yong Young^*

来源：Thin Solid Films, 2014, 556: 414-418.

DOI：10.1016/j.tsf.2014.01.004

• Organic field-effect transistors
• Charge transport
• Conjugated molecules
• Printed electronics

We report the fabrication of high-performance solution-processed organic field-effect transistors (OFETs) using small-molecule polymer blends as the active layer. N,N-dialkyl-substituted-(1,7%261,6)-dicyanoperylene-3,4: 9,10-bis (dicarboximide) derivative (PDI-RCN2) and polystyrene (PS) or poly[(9,9-di-n-octylfluorenyl-2,7-diyl)-alt-(benzo[2,1,3]thiadiazol-4,8-diyl)] (F8BT) are used as the small molecules and polymer binders, respectively, that comprise the semiconducting layer. Both the n-type PDI-RCN2 and PS or F8BT-blended OFETs have high field-effect mobility (mu(FET)) of 0.4 cm(2)/Vs, with average mu(FET) values of 0.25 and 0.16 cm(2)/Vs for PDI-RCN2/F8BT and PDI-RCN2/PS, respectively. Moreover, OFETs with blended active layers exhibit significantly improved device-to-device uniformity and reproducibility, as evidenced by the mu(FET) standard deviations of 0.23, 0.1, and 0.12 for PDI-RCN2, PDI-RCN2/PS, and PDI-RCN2/F8BT, respectively.

• 出版日期2014-4-1