title: Conjugated polymer-fullerene blend with strong optical limiting in the near-infrared.
abstract: Optical-quality, melt processable thick films of a conjugated polymer blend containing poly(2-methoxy-5-(2-ethyl-hexyloxy)-(phenylene vinylene)) (MEH-PPV), a C(60) derivative (PCBM) and a plasticizer (1,2-di-iso-octylphthalate) have been developed and their nonlinear absorption and optical limiting properties have been investigated. These blend materials exhibited strong optical limiting characteristics in the near infrared region (750-900 nm), with broad temporal dynamic range spanning femtosecond to nanosecond pulse widths. The dispersion of the optical limiting figure-of-merit of the MEH-PPV:PCBM:DOP blend shows a peak near the wavelength of the MEH-PPV cation, indicating an important role of one-photon and two-photon induced charge transfer in the nonlinear absorption response.
authors.affiliation: School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, USA.
authors.forename: San-Hui
authors.initials: SH
authors.lastname: Chi
authors.forename: Joel M
authors.initials: JM
authors.lastname: Hales
authors.forename: Matteo
authors.initials: M
authors.lastname: Cozzuol
authors.forename: Charles
authors.initials: C
authors.lastname: Ochoa
authors.forename: Madison
authors.initials: M
authors.lastname: Fitzpatrick
authors.forename: Joseph W
authors.initials: JW
authors.lastname: Perry
mesh_terms: D000042:Absorption; D002412:Cations; D037741:Fullerenes / Q000737:chemistry*; D007259:Infrared Rays; D008422:Materials Testing; D008956:Models, Chemical; D055095:Optics and Photonics; D017785:Photons; D010795:Phthalic Acids / Q000737:chemistry; D010968:Plasticizers; D011108:Polymers / Q000737:chemistry*; D019265:Spectroscopy, Near-Infrared / Q000295:instrumentation / Q000379:methods; D014753:Vinyl Compounds / Q000737:chemistry
chemical_list: C539575:(6,6)-phenyl C61-butyric acid methyl ester; D002412:Cations; D037741:Fullerenes; D010795:Phthalic Acids; D010968:Plasticizers; D011108:Polymers; D014753:Vinyl Compounds; C520682:poly(2-methoxy-5-(2'-ethylhexyloxy)-p-phenylenevinylene); C471688:diisooctyl phthalate; C069837:fullerene C60