Europium(ii) complexes with substituted triethylenetetramine: new emitters to construct efficient deep blue organic light emitting diodes by spin coating

Abstract

Organic light-emitting diodes (OLEDs) have been considered as the next generation display and lighting technologies. However, deep blue OLEDs are still the bottleneck due to the lack of efficient luminescence...

Solution‐Phase Tuning of Emission of Divalent Europium

“…That change in geometry dominates the Lewis basicity of the donor atoms with respect to control of orbital energies. A similar trend is observed in the emission of Eu II ‐cyclooctatetraene complexes with and without the addition of bulky silyl groups on the cyclooctatetraene ring ( 18 and 19 ) [25] and other systems [18,26–27] …”

“…A similar trend is observed in the emission of Eu II -cyclooctatetraene complexes with and without the addition of bulky silyl groups on the cyclooctatetraene ring (18 and 19) [25] and other systems. [18,[26][27] In addition to cryptands, derivatives of tris(2-aminoethyl) amine (tren, 9-10 and 20-21), and cyclopentadiene (22)(23)(24) have been used to study the luminescence of Eu II . [18][19][20]28,29] Like with cryptates, the emission of divalent europium in derivatives of tren display patterns in which the Lewis basicity of donor atoms affects the splitting of 4 f and 5d orbitals.…”

Electrohydrodynamically Printed d–f Transition Cerium(III) Complex

“…Rare earth complexes with parity-allowed d–f transition exhibit high photoluminescence quantum yield (PLQY) up to 100%, short excited-state lifetime to tens of nanoseconds, tunable emission covering three primary colors, and exceptional thermal stability with high decomposition temperature. − Therefore, d–f transition rare earth complexes have been regarded as a promising candidate material for display applications.…”