White electroluminescence of lanthanide complexes resulting from exciplex formation

Gaël Zucchi; Taewoo Jeon; Denis Tondelier; Dmitry Aldakov; Pierre Thuéry; Michel Ephritikhine; Bernard Geffroy

doi:10.1039/b921740a

White electroluminescence of lanthanide complexes resulting from exciplex formation

Gaël Zucchi
, Taewoo Jeon
, Denis Tondelier
, Dmitry Aldakov
, Pierre Thuéry
, Michel Ephritikhine
, Bernard Geffroy

Research output: Contribution to journal › Article › peer-review

Abstract

Bimetallic complexes of the visible-emitting Eu³⁺, Tb ³⁺ and Sm³⁺ ions with 2,2′-bipyrimidine (bpm) and acetylacetonate (acac) ligands have been synthesized and crystallographically characterized. They have been found to be isomorphous with the general formula [{Ln(acac)₃}₂(μ-bpm)] (Ln = Eu, 1; Ln = Tb, 2; Ln = Sm, 3). Their X-ray crystal structure shows that the aromatic polyamine ligand bridges the two metal ions. These volatile complexes have been thermally evaporated to be introduced in multilayer OLEDs as dopants. In addition to the electroluminescence of the lanthanide ion, a broad emission in the yellow-green region was obtained. This resulted in white electroluminescence of the devices doped with 1 or [{Eu(tta)₃}₂(μ-bpm)] (4) complexes (tta = 2-thenoyltrifluoromethanesulfonato). This broad emission is shown to be caused by the formation of an exciplex between the dopant and the host matrix within the emitting layer of the devices.

Original language	English
Pages (from-to)	2114-2120
Number of pages	7
Journal	Journal of Materials Chemistry
Volume	20
Issue number	11
DOIs	https://doi.org/10.1039/b921740a
Publication status	Published - 9 Mar 2010
Externally published	Yes

Access to Document

10.1039/b921740a

Cite this

@article{568f482d019d473fbf49fef14c2f4443,

title = "White electroluminescence of lanthanide complexes resulting from exciplex formation",

abstract = "Bimetallic complexes of the visible-emitting Eu3+, Tb 3+ and Sm3+ ions with 2,2′-bipyrimidine (bpm) and acetylacetonate (acac) ligands have been synthesized and crystallographically characterized. They have been found to be isomorphous with the general formula [\{Ln(acac)3\}2(μ-bpm)] (Ln = Eu, 1; Ln = Tb, 2; Ln = Sm, 3). Their X-ray crystal structure shows that the aromatic polyamine ligand bridges the two metal ions. These volatile complexes have been thermally evaporated to be introduced in multilayer OLEDs as dopants. In addition to the electroluminescence of the lanthanide ion, a broad emission in the yellow-green region was obtained. This resulted in white electroluminescence of the devices doped with 1 or [\{Eu(tta)3\}2(μ-bpm)] (4) complexes (tta = 2-thenoyltrifluoromethanesulfonato). This broad emission is shown to be caused by the formation of an exciplex between the dopant and the host matrix within the emitting layer of the devices.",

author = "Ga{\"e}l Zucchi and Taewoo Jeon and Denis Tondelier and Dmitry Aldakov and Pierre Thu{\'e}ry and Michel Ephritikhine and Bernard Geffroy",

year = "2010",

month = mar,

day = "9",

doi = "10.1039/b921740a",

language = "English",

volume = "20",

pages = "2114--2120",

journal = "Journal of Materials Chemistry",

issn = "0959-9428",

number = "11",

}

TY - JOUR

T1 - White electroluminescence of lanthanide complexes resulting from exciplex formation

AU - Zucchi, Gaël

AU - Jeon, Taewoo

AU - Tondelier, Denis

AU - Aldakov, Dmitry

AU - Thuéry, Pierre

AU - Ephritikhine, Michel

AU - Geffroy, Bernard

PY - 2010/3/9

Y1 - 2010/3/9

N2 - Bimetallic complexes of the visible-emitting Eu3+, Tb 3+ and Sm3+ ions with 2,2′-bipyrimidine (bpm) and acetylacetonate (acac) ligands have been synthesized and crystallographically characterized. They have been found to be isomorphous with the general formula [{Ln(acac)3}2(μ-bpm)] (Ln = Eu, 1; Ln = Tb, 2; Ln = Sm, 3). Their X-ray crystal structure shows that the aromatic polyamine ligand bridges the two metal ions. These volatile complexes have been thermally evaporated to be introduced in multilayer OLEDs as dopants. In addition to the electroluminescence of the lanthanide ion, a broad emission in the yellow-green region was obtained. This resulted in white electroluminescence of the devices doped with 1 or [{Eu(tta)3}2(μ-bpm)] (4) complexes (tta = 2-thenoyltrifluoromethanesulfonato). This broad emission is shown to be caused by the formation of an exciplex between the dopant and the host matrix within the emitting layer of the devices.

AB - Bimetallic complexes of the visible-emitting Eu3+, Tb 3+ and Sm3+ ions with 2,2′-bipyrimidine (bpm) and acetylacetonate (acac) ligands have been synthesized and crystallographically characterized. They have been found to be isomorphous with the general formula [{Ln(acac)3}2(μ-bpm)] (Ln = Eu, 1; Ln = Tb, 2; Ln = Sm, 3). Their X-ray crystal structure shows that the aromatic polyamine ligand bridges the two metal ions. These volatile complexes have been thermally evaporated to be introduced in multilayer OLEDs as dopants. In addition to the electroluminescence of the lanthanide ion, a broad emission in the yellow-green region was obtained. This resulted in white electroluminescence of the devices doped with 1 or [{Eu(tta)3}2(μ-bpm)] (4) complexes (tta = 2-thenoyltrifluoromethanesulfonato). This broad emission is shown to be caused by the formation of an exciplex between the dopant and the host matrix within the emitting layer of the devices.

U2 - 10.1039/b921740a

DO - 10.1039/b921740a

M3 - Article

AN - SCOPUS:77649210594

SN - 0959-9428

VL - 20

SP - 2114

EP - 2120

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

IS - 11

ER -

White electroluminescence of lanthanide complexes resulting from exciplex formation

Abstract

Access to Document

Fingerprint

Cite this