Iridium Based Ionic Materials For Information Recording And Storage

Iridium based ionic complexes containing lots of divine photophysical properties, for example, high conductively, high luminescence efficiencies, significant Stokes shifts and easy-to-adjust emission properties. Duo to those significative properties, Iridium based materials are widely used in organic light emitting diodes(OLEDs), light emitting cells(LECs), organic electrical bistability devices(OEBDs), sensors, and bio-imaging. Ironic materials possess many fine characters relative to neutral materials one of them is easy process under solution, ionic materials dissolved in high boiling point solvent by spin coating production device can simplify the fabrication process of devices. Therefore, it is meaningful to study the synthesis and the application of Iridium based ionic complexes in optoelectronic devices.In this work we synthetized Iridium based complexes IrPMP and IrPHP, containing active N-H moiety on the auxiliary ligand. And organic memory materials 2Fppy-2t BTBBM, ppy-2tBTBBM with triazine as core and carbazole as outer-ring.All the synthetized materials have been though 1H NMR and MALDI-TOP-MS to confirm structure. Both IrPMP and IrPHP show dual emission, the emission peak located at 525 nm、625 nm and 525 nm、630 nm, respectively. IrPMP and IrPHP can show emission color change from yellow to green and red under electrical field stimulus, the mechanization of electrochromism has been deeply studied. Interestingly, with the introduction of imidazole salt IrPMP need a lower droving voltage to change emission color than IrPHP. Based on electrochromism an electrochromic film device has been fabricated and realized information record and storage under flexible condition. And based on the easy process ability of ionic materials, we fabricated organic electrical bistability devices using 2Fppy-2t BTBBM and ppy-2tBTBBM, the organic electrical bistability devices with 2Fppy-2tBTBBM has very low droving voltage under-1.0 V. We hope ionic iridium based materials could cut down the droving voltage of optoelectronic devices in the near future.