title: Temperature dependence of exciton diffusion in a small-molecule organic semiconductor processed with and without additive.
abstract: The temperature dependence of exciton diffusion in a small-molecule organic semiconductor processed with and without additive is investigated. As-cast and 1,8-diiodooctane-processed films yield exciton diffusion lengths of 6.8 and 4.9 nm, respectively. Using a Monte Carlo simulation, it is shown that processing with 1,8-diiodooctane increases the excitonic trap density, which directly reduces the exciton diffusion length.
authors.affiliation: Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106, USA.
authors.forename: Jason D A
authors.initials: JD
authors.lastname: Lin
authors.forename: Oleksandr V
authors.initials: OV
authors.lastname: Mikhnenko
authors.forename: Thomas S
authors.initials: TS
authors.lastname: van der Poll
authors.forename: Guillermo C
authors.initials: GC
authors.lastname: Bazan
authors.forename: Thuc-Quyen
authors.initials: TQ
authors.lastname: Nguyen
keywords: additive processing; exciton diffusion length; photoluminescence; temperature dependence; trap density