Novel type of nanoscale modification of organic semiconductors: self-assembled monolayers at organic surfaces
Speaker: Vitaly Podzorov, Rutgers Physics
Date & Time: September 10, 2009 - 12:00pm
Location: Chem. 260
It was discovered that self-assembled monolayers (SAM) of silanes could be grown directly at the surface of small-molecule  and polymer  organic semiconductors, the materials of a great interest for organic electronics. One of the most interesting consequences of SAM formation on these materials is a high-density 2D hole gas induced at the SAM-organic interface [1,2]. This talk will cover our basic observations and other interesting effects related to this phenomenon. It will also include a discussion of surface characterization of pristine and SAM-modified molecular crystals and conjugated polymers, providing insights into the SAM composition and growth mechanism. Novel transport and optical properties of SAM-functionalized organic semiconductors will be briefly discussed .
1. M. F. Calhoun et al., "Electronic functionalization of the surface of organic semiconductors with self-assembled monolayers", Nature Mat. 7, 84 (2008).
2. C.-Y. Kao et al, "Doping of conjugated polythiophenes with alkyl silanes", Adv. Funct. Mater. 19, 1 (2009).
3. B. Lee et al., to appear in Adv. Funct. Mater. (2009).