Interface engineering of semiconductor/dielectric heterojunctions toward functional organic thin-film transistors.

Abstract

Interface modification is an effective and promising route for developing functional organic field-effect transistors (OFETs). In this context, however, researchers have not created a reliable method of functionalizing the interfaces existing in OFETs, although this has been crucial for the technological development of high-performance CMOS circuits. Here, we demonstrate a novel approach that enables us to reversibly photocontrol the carrier density at the interface by using photochromic spiropyran (SP) self-assembled monolayers (SAMs) sandwiched between active semiconductors and gate insulators. Reversible changes in dipole moment of SPs in SAMs triggered by lights with different wavelengths produce two distinct built-in electric fields on the OFET that can modulate the channel conductance and consequently threshold voltage values, thus leading to a low-cost noninvasive memory device. This concept of interface functionalization offers attractive new prospects for the development of organic electronic devices with tailored electronic and other properties.

• Authors: Hongtao Zhang, Xuefeng Guo, Jingshu Hui, Shuxin Hu, Wei Xu, Daoben Zhu
• Journal: Nano letters (Nano Lett) Vol. 11 Issue 11 Pg. 4939-46 (Nov 09 2011) ISSN: 1530-6992 [Electronic] United States
• PMID: 22011136 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Membranes, Artificial
• Organic Chemicals

Topics

• Electrodes
• Equipment Design
• Equipment Failure Analysis
• Membranes, Artificial
• Nanotechnology (instrumentation)
• Organic Chemicals (chemistry)
• Semiconductors
• Transistors, Electronic