title: White light-emitting electrochemical cells based on the Langmuir-Blodgett technique.
abstract: Light-emitting electrochemical cells (LECs) showing a white emission have been prepared with Langmuir-Blodgett (LB) films of the metallosurfactant bis[2-(2,4-difluorophenyl)pyridine][2-(1-hexadecyl-1H-1,2,3-triazol-4-yl)pyridine]iridium(III) chloride (1), which work with an air-stable Al electrode. They were prepared by depositing a LB film of 1 on top of a layer of poly(N,N'-diphenyl-N,N'-bis(4-hexylphenyl)-[1,1'-biphenyl]-4,4'-diamine (pTPD) spin-coated on indium tin oxide (ITO). The white color of the electroluminescence of the device contrasts with the blue color of the photoluminescence of 1 in solution and within the LB films. Furthermore, the crystal structure of 1 is reported together with the preparation and characterization of the Langmuir monolayers (π-A compression isotherms and Brewster angle microscopy (BAM)) and LB films of 1 (IR, UV-vis and emission spectroscopy, X-ray photoelectron spectroscopy (XPS), specular X-ray reflectivity (SXR), and atomic force microscopy (AFM)).
authors.affiliation: Physicalisches Institut and Center for Nanotechnology (CeNTech), Westfälische Wilhelms-Universität Münster , Heisenbergstrasse 11, 48149 Münster, Germany.
authors.forename: Jesús M
authors.initials: JM
authors.lastname: Fernández-Hernández
authors.forename: Luisa
authors.initials: L
authors.lastname: De Cola
authors.forename: Henk J
authors.initials: HJ
authors.lastname: Bolink
authors.forename: Miguel
authors.initials: M
authors.lastname: Clemente-León
authors.forename: Eugenio
authors.initials: E
authors.lastname: Coronado
authors.forename: Alicia
authors.initials: A
authors.lastname: Forment-Aliaga
authors.forename: Angel
authors.initials: A
authors.lastname: López-Muñoz
authors.forename: Diego
authors.initials: D
authors.lastname: Repetto