A single component white electroluminescent device fabricated from a metallo-organic terbium complex

Rashid Ilmi; Muhammad S. Khan; Weidong Sun; Liang Zhou; Wai Yeung Wong; Paul R. Raithby

doi:10.1039/c9tc04653d

A single component white electroluminescent device fabricated from a metallo-organic terbium complex

Rashid Ilmi, Muhammad S. Khan, Weidong Sun, Liang Zhou, Wai Yeung Wong, Paul R. Raithby

Department of Chemistry

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

38 Citations (SciVal)

Abstract

Two new mixed ligand complexes [Eu(tfac)₃(DPEPO)] (Eu-1) and [Tb(tfac)₃(DPEPO)] (Tb-2) incorporating trifluoroacetylacetone (Htfac) and bis(2-(diphenylphosphino)phenyl)ether oxide (DPEPO) were synthesized in gram-scale quantities and used as emitters to fabricate single- and double-EML (light-emitting layer) electroluminescence (EL) devices. The single-EML device with the structure: ITO/HAT-CN (6 nm)/HAT-CN (0.2 wt%):TAPC (50 nm)/Eu-1 (1-6 wt%): 26DCzPPy (10 nm)/Tm3PyP26PyB (50 nm)/LiF (1 nm)/Al (100 nm) showed light red (CIE, x: 0.574; y: 0.275) emission for the Eu-1 based EL devices due to the presence of a host emission with a brightness of 1274 cd m^-2, current efficiency (η_c), power efficiency (η_p) and external quantum efficiency (EQE) of 0.58 cd A^-1, 0.68 lm W^-1, and 0.70%, respectively. The single-EML device for the Tb-2 complex with the same device structure displayed white-light emission. The optimized single-EML device of Tb-2 with 14.0 wt% doping concentration showed an impressive EL performance with brightness of 1637 cd m^-2, η_c ≈ 3.05 cd A^-1, η_p ≈ 2.80 lm W^-1, EQE ≈ 1.4%, V_turn-on ≈ 3.1 V, respectively. This is the first report of single component white organic light emitting diode (W-OLED) fabricated from an organo-Tb(iii) complex. The W-OLEDs show low turn-on voltages (V_turn-on) ≈ 3.1 V and are thus advantageous in lowering the power consumption of the OLED display.

Original language	English
Pages (from-to)	13966-13975
Number of pages	10
Journal	Journal of Materials Chemistry C
Volume	7
Issue number	44
Early online date	23 Oct 2019
DOIs	https://doi.org/10.1039/c9tc04653d
Publication status	Published - 28 Nov 2019

Funding

MSK acknowledges His Majesty’s Trust Fund for Strategic Research (Grant No. SR/SQU/SCI/CHEM/16/02) for funding. RI thanks HM’s Trust Fund for a post-doctoral fellowship. PRR is grateful to the Engineering and Physical Sciences Research Council (EPSRC, UK) for funding (EP/K004956/1). WYW thanks the Hong Kong Polytechnic University (1-ZE1C) and the Endowed Professorship in Energy from Ms Clarea Au (847S) for the financial support. LZ is grateful to the financial aid from National Natural Science Foundation of China (21771172), Youth Innovation Promotion Association of Chinese Academy of Sciences (2013150).

ASJC Scopus subject areas

General Chemistry
Materials Chemistry

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10.1039/c9tc04653dLicence: CC BY

Cite this

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title = "A single component white electroluminescent device fabricated from a metallo-organic terbium complex",

abstract = "Two new mixed ligand complexes [Eu(tfac)3(DPEPO)] (Eu-1) and [Tb(tfac)3(DPEPO)] (Tb-2) incorporating trifluoroacetylacetone (Htfac) and bis(2-(diphenylphosphino)phenyl)ether oxide (DPEPO) were synthesized in gram-scale quantities and used as emitters to fabricate single- and double-EML (light-emitting layer) electroluminescence (EL) devices. The single-EML device with the structure: ITO/HAT-CN (6 nm)/HAT-CN (0.2 wt%):TAPC (50 nm)/Eu-1 (1-6 wt%): 26DCzPPy (10 nm)/Tm3PyP26PyB (50 nm)/LiF (1 nm)/Al (100 nm) showed light red (CIE, x: 0.574; y: 0.275) emission for the Eu-1 based EL devices due to the presence of a host emission with a brightness of 1274 cd m-2, current efficiency (ηc), power efficiency (ηp) and external quantum efficiency (EQE) of 0.58 cd A-1, 0.68 lm W-1, and 0.70%, respectively. The single-EML device for the Tb-2 complex with the same device structure displayed white-light emission. The optimized single-EML device of Tb-2 with 14.0 wt% doping concentration showed an impressive EL performance with brightness of 1637 cd m-2, ηc ≈ 3.05 cd A-1, ηp ≈ 2.80 lm W-1, EQE ≈ 1.4%, Vturn-on ≈ 3.1 V, respectively. This is the first report of single component white organic light emitting diode (W-OLED) fabricated from an organo-Tb(iii) complex. The W-OLEDs show low turn-on voltages (Vturn-on) ≈ 3.1 V and are thus advantageous in lowering the power consumption of the OLED display.",

author = "Rashid Ilmi and Khan, {Muhammad S.} and Weidong Sun and Liang Zhou and Wong, {Wai Yeung} and Raithby, {Paul R.}",

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AU - Ilmi, Rashid

AU - Khan, Muhammad S.

AU - Sun, Weidong

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AU - Wong, Wai Yeung

AU - Raithby, Paul R.

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AB - Two new mixed ligand complexes [Eu(tfac)3(DPEPO)] (Eu-1) and [Tb(tfac)3(DPEPO)] (Tb-2) incorporating trifluoroacetylacetone (Htfac) and bis(2-(diphenylphosphino)phenyl)ether oxide (DPEPO) were synthesized in gram-scale quantities and used as emitters to fabricate single- and double-EML (light-emitting layer) electroluminescence (EL) devices. The single-EML device with the structure: ITO/HAT-CN (6 nm)/HAT-CN (0.2 wt%):TAPC (50 nm)/Eu-1 (1-6 wt%): 26DCzPPy (10 nm)/Tm3PyP26PyB (50 nm)/LiF (1 nm)/Al (100 nm) showed light red (CIE, x: 0.574; y: 0.275) emission for the Eu-1 based EL devices due to the presence of a host emission with a brightness of 1274 cd m-2, current efficiency (ηc), power efficiency (ηp) and external quantum efficiency (EQE) of 0.58 cd A-1, 0.68 lm W-1, and 0.70%, respectively. The single-EML device for the Tb-2 complex with the same device structure displayed white-light emission. The optimized single-EML device of Tb-2 with 14.0 wt% doping concentration showed an impressive EL performance with brightness of 1637 cd m-2, ηc ≈ 3.05 cd A-1, ηp ≈ 2.80 lm W-1, EQE ≈ 1.4%, Vturn-on ≈ 3.1 V, respectively. This is the first report of single component white organic light emitting diode (W-OLED) fabricated from an organo-Tb(iii) complex. The W-OLEDs show low turn-on voltages (Vturn-on) ≈ 3.1 V and are thus advantageous in lowering the power consumption of the OLED display.

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A single component white electroluminescent device fabricated from a metallo-organic terbium complex

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Applying Long-Lived Metastable States in Switchable Functionality via Kinetic Control of Molecular Assembly

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A single component white electroluminescent device fabricated from a metallo-organic terbium complex

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Applying Long-Lived Metastable States in Switchable Functionality via Kinetic Control of Molecular Assembly

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