title: Electric field distribution in polymer light-emitting electrochemical cells
abstract: We use electroabsorption spectroscopy and modeling studies to probe the electric field in light-emitting electrochemical cells. At room temperature and constant applied bias, the steady-state internal field is zero for a range of biases. However, when the ions are frozen in place by cooling under steady bias, and the bias is subsequently changed, the profile of the electric potential resembles a typical p-n junction.
authors.affiliation: Cavendish Laboratory, Madingley Road, Cambridge, CB3 OHE, United Kingdom.
authors.initials: JC
authors.lastname: deMello
authors.initials: JJ
authors.lastname: Halls
authors.initials: SC
authors.lastname: Graham
authors.initials: N
authors.lastname: Tessler
authors.initials: RH
authors.lastname: Friend