Air stability of PTCDI-C13-based n-OFETs on polymer interfacial layers

作者：Roh Jeongkyun; Lee Jaemin; Kang Chan mo; Lee Changhee^*; Jung Byung Jun

来源：Physica Status Solidi-Rapid Research Letters, 2013, 7(7): 469-472.

DOI：10.1002/pssr.201307150

• organic field effect transistor
• organic thin film transistor
• PTCDI-C13
• air stability

This Letter reports the novel use of poly(9-vinylcarbazole) (PVK) as a dielectric interfacial layer for n-type organic field-effect transistors (n-OFETs). With PVK, both the air stability and electron mobility of N,N-ditridecylperylene-3,4,9,10-tetracarboxylic diimide (PTCDI-C13)-based OFETs were improved. Among the PVKs with different weight-average molecular weight (M-w), PVK with high M-w showed good performance. The high glass transition temperature of PVK enabled thermal post annealing of the active layer, which resulted in a high electron mobility of 0.61 cm(2)/Vs. This mobility was maintained at 90% and 59% after 4 days and 105 days in air, respectively. The PVK interfacial layer reduced the trapped charges in the PTCDI-C13-based n-OFET for air-exposure and caused a decrease in the threshold voltage shift.

• 出版日期2013-7