Dresden 2017 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 50: Poster: Organic Electronics and Photovoltaics, Molecular Excitations
CPP 50.8: Poster
Mittwoch, 22. März 2017, 18:30–21:00, P3
Solvent Induced Galvanoluminescence of Metal-Organic Framework Electroluminescent Diodes — •Haonan Huang1, Michelle Beuchel2, Dago de Leeuw2, and Kamal Asadi2 — 1Max Planck Institute for Solid State Research, D-70569 Stuttgart — 2Max Planck Institute for Polymer Research, D-55128 Mainz
Alternating current (AC) electroluminescent diodes were fabricated from MOF-5, a metal organic framework consisting of tetrahedral [Zn4O]6+ units linked by 1,4-benzenedicarboxylate ligands. An additional insulating layer was incorporated to prevent formation of electrical shorts. The electroluminescence spectrum was dramatically red-shifted with respect to the photoluminescence spectrum. By deliberately varying trapped solvent molecules, we demonstrate that the light emission does not originate from MOF-5 but is due to galvanoluminescence, emission of weak optical radiation in the visible region that occurs during anodic oxidation of the Al top electrode in contact with electrolytes.