6533b839fe1ef96bd12a5bc1

RESEARCH PRODUCT

White Light-Emitting Electrochemical Cells Based on the Langmuir–Blodgett Technique

Miguel Clemente-leónJesus M. Fernandez-hernandezLuisa De ColaHenk J. BolinkDiego RepettoAlicia Forment-aliagaAngel López-muñozEugenio Coronado

subject

PhotoluminescenceBrewster's angleMaterials scienceAnalytical chemistrySurfaces and InterfacesElectroluminescenceCondensed Matter PhysicsLangmuir–Blodgett filmIndium tin oxidesymbols.namesakeX-ray photoelectron spectroscopyMicroscopyMonolayerElectrochemistrysymbolsGeneral Materials ScienceSpectroscopy

description

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)).

yearjournalcountryeditionlanguage
2014-10-28Langmuir
https://doi.org/10.1021/la503144v