Self Assembly and Pyroelectric Poling for Organics
Technical Report,01 Apr 2012,31 Mar 2015
University of Washington SEATTLE United States
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Insulating, dipolar and semiconducting molecular phosphonic acid PA self-assembled monolayers SAMs have been developed for applications in organic field-effect transistors OFETs and graphene transistors for low-power, low-cost flexible electronics. Multifunctional SAMs on ultrathin metal oxides, such as hafnium oxide and aluminum oxide, are shown to realize 1 enhanced performance of self-assembled monolayer field-effect transistors SAMFETs , 2 bottom-contact small-molecule n-type organic field effect transistors , 3 low operational voltage and high performance organic field effect memory transistors , and 4 systematic doping control of CVD graphene transistors. Key strategies of using electric field generated by pyroelectricity have been explored to efficiently pole highly efficient organic electro-optic OEO materials in thin films and nanophotonic waveguides. Through surface modification, novel pyroelectric elements such as pyroelectric crystals and ceramics are modified as conformal and detachable electric field source to study basic electrostatics and develop new device concepts for hybrid OEO nanophotonic platforms.