A study on electrical contact at the PEDOT:PSS electrode/molecule interface in large-area molecular junctions

作者：Jeong Inho; Song Hyunwook^*

来源：Journal of the Korean Physical Society, 2017, 71(3): 161-165.

DOI：10.3938/jkps.71.161

• Molecular electronics
• Molecular junctions
• PEDOT: PSS
• Transition voltage spectroscopy

We have investigated the effect of the PEDOT:PSS electrode/molecule contact on the charge transport characteristics of large-area molecular junctions. We incorporated two different benzenethiolate molecules into the molecular junctions: 4-methylbenzenethiol (MBT) and benzene- 1,4-dithiol (BDT). They have an identical backbone structure but different top end-groups. From statistical analysis, we found that the tunneling transport behavior showed a significant difference between the two prototype conjugated molecules, which was attributed to their distinct electrical contacts at the PEDOT:PSS electrode/molecule interface. We also observed an enhancement of the junction conductance at elevated temperatures, which would be caused by the increased grain size of the conducting PEDOT-rich cores and the removal of residual solvents or water in the junctions.

• 出版日期2017-8