Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/101712
Title: An efficient heterodinuclear Ir(iii)/Pt(ii) complex: Synthesis, photophysics and application in light-emitting electrochemical cells
Authors: Shafikov, M. Z.
Tang, S.
Larsen, C.
Bodensteiner, M.
Kozhevnikov, V. N.
Edman, L.
Issue Date: 2019
Publisher: Royal Society of Chemistry
Citation: An efficient heterodinuclear Ir(iii)/Pt(ii) complex: Synthesis, photophysics and application in light-emitting electrochemical cells / M. Z. Shafikov, S. Tang, C. Larsen, et al. — DOI 10.1039/c9tc02930c // Journal of Materials Chemistry C. — 2019. — Vol. 7. — Iss. 34. — P. 10672-10682.
Abstract: We report on the design, synthesis, characterization and successful application of a heterodinuclear Ir(iii)/Pt(ii) complex endowed with two 4,6-diphenylpyrimidine ligands and two acetylacetonate ligands, with one of the former being the rigid bridging unit between the two metal centers. The heterodinuclear complex exhibits red phosphorescence with a high quantum yield of ΦPL = 85% and a short room-temperature decay time of τ = 640 ns in degassed toluene solution. The high efficiency of the spin-forbidden T1 → S0 transition is demonstrated to originate in a strong spin-orbit coupling of the T1 state with a manifold of excited singlet states, which contributes to the record-breaking zero-field splitting of the T1 state of 240 cm-1. The high-solubility and non-ionic hetero-dinuclear complex was employed as the emissive guest compound in host-guest light-emitting electrochemical cells, and such optimized devices delivered vibrant red emission (λpeak = 615 nm) with a second-fast turn-on and a high external quantum efficiency of 2.7% at a luminance of 265 cd m-2 This journal is © The Royal Society of Chemistry.
Keywords: CHELATION
EFFICIENCY
ELECTROCHEMICAL CELLS
EXCITED STATES
LIGANDS
LIGHT EMISSION
PHOTOPHYSICS
QUANTUM EFFICIENCY
ACETYLACETONATE LIGANDS
EXCITED SINGLET STATE
EXTERNAL QUANTUM EFFICIENCY
HETERODINUCLEAR COMPLEXES
LIGHT-EMITTING ELECTROCHEMICAL CELL
RED PHOSPHORESCENCE
SPIN-ORBIT COUPLINGS
ZERO-FIELD SPLITTINGS
IRIDIUM COMPOUNDS
URI: http://hdl.handle.net/10995/101712
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85071606638
PURE ID: 10767943
8bf48216-5c3a-45b7-a2ed-ec3368e891a4
ISSN: 20507534
DOI: 10.1039/c9tc02930c
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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