Solvent-Induced Galvanoluminescence of Metal–Organic Framework Electroluminescent DiodesClick to copy article linkArticle link copied!
- Haonan Huang
- Michelle Beuchel
- Yeseul Park
- Patrick J. Baesjou
- Stefan C. J. Meskers
- Dago M. de Leeuw
- Kamal Asadi
Abstract
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.
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