On the development of a new approach to the design of lanthanide-based materials for solution-processed OLEDs

Abstract

The targeted design of lanthanide-based emitters for solution-processed OLEDs was aimed at the combination of high luminescence efficiency with solubility and charge carrier mobility.

New Coordination Polymers of Selected Lanthanides with 1,2-Phenylenediacetate Linker: Structures, Thermal and Luminescence Properties

“…Taking into account the sharp emissions of the europium(III) and terbium(III) complexes in the visible light range, these compounds can be further investigated for their potential applications in solid state lighting and display areas [70,71]. Generally, metal complexes offer better compatibility with organic matrices in the OLEDs system compared with inorganic compounds.…”

“…Generally, metal complexes offer better compatibility with organic matrices in the OLEDs system compared with inorganic compounds. On the other hand, the utilization of lanthanide complexes in the fabrication of OLEDs is strongly limited by their poor solubility and charge transportation features [71,72]. The other fields of their potential application is sensing of small molecules, cations and anions, pH or temperature [33].…”

A 50% increase in the terbium-based OLED luminance through reducing the excited-state lifetime due to the introduction of gold nanoparticles

“…13 Electroluminescence properties of Tb(czb) 3 TDZP Tb(czb) 3 TDZP was tested as an emission layer in an OLED with the heterostructure ITO/PEDOT:PSS/poly-TPD/EML/TPBi/LiF/ Al, which was already approved for lanthanide coordination compounds. 28,33 The Tb(czb) 3 TDZP-based OLED gives rise to a typical terbium electroluminescence spectra (Fig. 4a).…”

“…27 The neutral ligand (TDZP, [1,2,5]thiadiazolo[3,4-f ][1,10]phenanthroline) contains an electron-accepting thiodiazole fragment to increase the electron transport properties and reduce the lifetime of the excited state. 13,28 This neutral ligand is utilized within the terbium complex, which showed record-breaking luminance and efficiency for Tb-based OLEDs. 29…”

PMMA or PVDF films blended with β-diketonate tetrakis EuIII or TbIII complexes used as downshifting coatings of near-UV LEDs

“…Lanthanide (Ln III ) complexes have been investigated for several applications 1 e.g. , biological markers, 2 contrast agents, 3 organic light-emitting diodes (OLEDs), 4 light-emitting diodes (LEDs), 5 among others. The Ln III luminescence arises from 4 f n –4 f n electronic transitions protected from the crystalline field by fulfilled 5s 2 and 5p 6 outer shells, which makes the energy of such transitions only slightly influenced by the chemical environment and renders narrow excitation and emission bands as well as high emission color purity 6 for most of the Ln III ions.…”