WFU Physics Colloquium

TITLE: Optical Two-Dimensional Fourier Transform Spectroscopy of P3HT Thin Films

SPEAKER: Professor Kenan Gundogdu,

TIME: Wednesday March 28, 2012 at 4:00 PM

PLACE: Room 101 Olin Physical Laboratory

Conjugated polymers and their hybrids with fullerenes have tremendous potential use for cheap, flexible, light weight opto-electronic applications and can be synthesized and processed to exhibit a variety of electronic behavior from metal-like to insulator. Critical fundamental aspects about their optical and electronic properties, including charge transport, excitations and de-excitations are still poorly understood despite years of work. Specifically the challenge of these materials arises from their soft nature and incomplete ordering. They can structurally organize into a variety of configurations and morphologies, which has significant impact on their physical characteristics, including mechanical properties such as hardness, fragility, and flexibility as well as electronic and optical properties including conductivity, optical absorption, and emission. Our understanding of the role of coupling between excitons, polarons, bipolarons, exciplexes and charge transfer states is still rather rudimentary, including radiative and non-radiative decay channels of the various states. In this work, we will present multidimensional spectroscopy and its applications to study exciton/charge dynamics in P3HT thin films.