Luminescent materials for solid-state lighting
Welcome to this Dalton Transactions themed issue on luminescent materials for solid-state lighting.
Computational insights into the photodeactivation dynamics of phosphors for OLEDs: a perspective
In this perspective we highlight recent computational efforts to unravel competing photodeactivation mechanisms of radiative and non-radiative nature of phosphors.
Improving the carrier balance of light-emitting electrochemical cells based on ionic transition metal complexes
Improved carrier balance of a light-emitting electrochemical cell reduces exciton quenching near the doped layers, rendering a higher device efficiency.
FIrpic: archetypal blue phosphorescent emitter for electroluminescence
FIrpic is the most investigated bis-cyclometallated iridium complex. This Perspective reviews the main experimental and theoretical aspects of FIrpic as well as its use as sky-blue emitter for OLED.
Unusual near-white electroluminescence of light emitting diodes based on saddle-shaped porphyrins
In contrast to the red electroluminescence emission frequently observed in porphyrins based OLED devices, the present devices exhibit a nearly white emission with greenish yellow, yellowish green and blue green hues.
Synthesis of dibenzothiophene-based host materials with a dimesitylborane substituent and their green PHOLED performances
Two structural isomers composed by linking between dibenzothiophene and dimesitylborane moieties on the phenyl group were synthesized and showed similar green device performance regardless of their different linkage positions.
X-shaped benzoylbenzophenone derivatives with crossed donors and acceptors for highly efficient thermally activated delayed fluorescence
Thermally activated delayed fluorescence (TADF) materials based on benzoylbenzophenone, AcPmBPX and PxPmBPX, were designed and synthesized.
Emissive Ir(III) complexes bearing thienylamido groups on a 1,10-phenanthroline scaffold
Highly emissive cyclometallated Ir(III) complexes bearing phenanthroline-based ancillary ligands are presented and the effect of tethered thiophene moieties on the photophysical properties is explored.
Paper
C^C* cyclometalated platinum(II) N-heterocyclic carbene complexes with a sterically demanding β-diketonato ligand – synthesis, characterization and photophysical properties
New platinum(II) triazolylidene complexes were prepared to investigate the influence of the 1,3-bis(2,4,6-trimethyl)-phenylpropan-1,3-dionato ligand on the photoluminescence properties.
Tuning the electronic and phosphorescence properties of blue-emitting iridium(III) complexes through different cyclometalated ligand substituents: a theoretical investigation
A DFT/TDDFT investigation was performed to estimate the OLED performance of six reported and seven newly designed iridium(III) complexes.
Synthesis and characterization of phosphorescent platinum and iridium complexes with cyclometalated corannulene
Novel, emissive Pt(II) and Ir(III) complexes are the first to have measured rates of inversion of cyclometalated corannulene.
Paper
Iridium(III) N-heterocyclic carbene complexes: an experimental and theoretical study of structural, spectroscopic, electrochemical and electrogenerated chemiluminescence properties
Theoretical and experimental studies of a series of iridium N-heterocyclic carbene complexes.
Paper
Formylated chloro-bridged iridium(III) dimers as OLED materials: opening up new possibilities
In this study, a series of four formyl-substituted chloro-bridged iridium(III) dimers were prepared.
Bidentate NHC^pyrozolate ligands in luminescent platinum(II) complexes
The tuning of luminescence from blue to yellow was achieved with platinum complexes containing NHC^pyrozolate and functionalized-phenyl-pyridine or triazole-pyridine ligands.
Neutral N^C^N terdentate luminescent Pt(II) complexes: their synthesis, photophysical properties, and bio-imaging applications
The reported cyclometallated Pt(II) complexes are characterized by a high cell permeability and a low cytotoxicity. In particular, PtL1Cl shows a very fast internalization kinetics.
Luminescent Pt(II) complexes bearing dual isoquinolinyl pyrazolates: fundamentals and applications
Pt(II) complex [Pt(Lx)2], LxH = 6-t-butyl-1-(3-trifluoromethyl-1H-pyrazol-5-yl) isoquinoline, with three colored morphologies can be interconverted by grinding and/or wetting with solvents.
Switchable platinum-based tweezers with Pt–Pt bonding and selective luminescence quenching
Molecular tweezers incorporating peripheral platinum salphen complexes and a central chelating terpyridine group have been synthesized and their switching and photophysical response to metal ions studied.
Cationic, luminescent cyclometalated iridium(III) complexes based on substituted 2-phenylthiazole ligands
Ten cationic heteroleptic iridium(III) complexes involving substituted phenylthiazole ligands reveal phosphorescence emission in solution.
Application of three-coordinate copper(I) complexes with halide ligands in organic light-emitting diodes that exhibit delayed fluorescence
Conventional bottom-emitting devices with three-layered structures containing sublimable three-coordinate copper(I) complexes produce bright green luminescence with maximum external quantum efficiencies (EQE) of 18.6–22.5%.
Blue phosphorescent N-heterocyclic carbene chelated Pt(II) complexes with an α-duryl-β-diketonato ancillary ligand
Blue phosphorescent Pt(II) complexes that display bright blue emission in the solid state have been obtained employing NHC-based C∧C*-chelate ligands and an α-duryl-β-diketonato ancillary ligand that provides steric blocking to minimize intermolecular interactions.
Methylated Re(I) tetrazolato complexes: photophysical properties and Light Emitting Devices
Methylated Re(I) tetrazolato complexes are suitable as phosphors for Light Emitting Devices.
Luminescent Re(I) terpyridine complexes for OLEDs: what does the DFT/TD-DFT probe reveal?
The electronic structure and spectroscopic properties of a series of rhenium(I) terpyridine complexes were investigated using density functional theory (DFT) and time dependent density functional theory (TD-DFT) methods.
Paper
A new class of luminescent Cu(I) complexes with tripodal ligands – TADF emitters for the yellow to red color range
A new class of emissive and neutral Cu(I) compounds with tripodal ligands is presented. The complexes were characterized chemically, computationally, and photophysically.
Emission energy of azole-based ionic iridium(III) complexes: a theoretical study
Tuning the emission color of azole-based iridium(III) complexes by changing the number and position of nitrogen atoms in the azole ring.
A new insight into the chemistry of iridium(III) complexes bearing phenyl phenylphosphonite cyclometalate and chelating pyridyl triazolate: the excited-state proton transfer tautomerism via an inter-ligand PO–H⋯N hydrogen bond
Ir(pdpit)(pppo)(bptz) complex (3) reveals a PO–H–N inter- ligand H-bond from which proton transfer takes place.
Tetraphenylborate versus tetraimidazolylborate as counterions for cationic iridium(III) complexes: enhanced electrochemical stabilities and electroluminescence
Tetraimidazolylborate is first used as the counterion of cationic iridium complexes to improve both electrochemical stabilities and device performance.
A heterotrimetallic Ir(III), Au(III) and Pt(II) complex incorporating cyclometallating bi- and tridentate ligands: simultaneous emission from different luminescent metal centres leads to broad-band light emission
Di- and tri-nuclear metal complexes incorporating Au(III), Ir(III) and Pt(II) units linked via a 1,3,5-triethynylbenzene core.
About this collection
Inorganic and organometallic components are essential for the creation of functioning light-emitting devices, the development of which is important for reducing world energy use.
This themed issue, guest edited by Dr Eli Zysman-Colman (University of St Andrews), highlights the latest and very best research in this field to the inorganic research community.