Two new red emitting ternary europium(III) complexes with high photoluminescence quantum yields and exceptional performance in OLED devices

Paul Raithby; Rashid Ilmi; Xiaofang Li; Nawal Al-Rashbi; Liang  Zhou; Wai-Yeung Wong; Muhammad S Khan

doi:10.1039/D3DT02147E

Two new red emitting ternary europium(III) complexes with high photoluminescence quantum yields and exceptional performance in OLED devices

Paul Raithby, Rashid Ilmi, Xiaofang Li, Nawal Al-Rashbi, Liang Zhou, Wai-Yeung Wong, Muhammad S Khan

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

10 Citations (SciVal)

Abstract

Two new organo-europium complexes (OEuCs) [Eu(btfa) ₃(Bathphen)] (OEuC-1) and [Eu(tta) ₃(Bathphen)] (OEuC-2) where btfa and tta are the anions of 4,4,4-trifluoro-1-phenyl-1,3-butanedione and 2-thenoyltrifluoroacetone while Bathphen = Bathophenanthroline have been synthesized and characterized. Both complexes in the solid state exhibit strong red emissions with photoluminescence quantum yields (PLQYs) of 80% ± 10%. These complexes were tested as dopants in the emitting layer (EML) to fabricate red organic light emitting diodes (R-OLEDs). Through device engineering involving the amalgamation of appropriate host materials and complexes, we have achieved exceptional overall R-OLED performance for an OEuC-2 based device, with maximum current efficiency (CE _max) = 9.91 cd A ⁻¹, maximum power efficiency (PE _max) = 9.15 lm W ⁻¹, maximum external quantum efficiency (EQE _max.) = 6.24%, brightness (B) of 545 cd m ⁻², and (CIE) _x,y = 0.620, 0.323

Original language	English
Pages (from-to)	12885-12891
Number of pages	7
Journal	Dalton Transactions
Volume	52
Issue number	36
Early online date	15 Aug 2023
DOIs	https://doi.org/10.1039/D3DT02147E
Publication status	Published - 28 Sept 2023

Bibliographical note

Acknowledgements:
MSK acknowledges His Majesty's Trust Fund for Strategic Research (Grant No. SR/SQU/SCI/CHEM/21/01) and The Ministry of Higher Education, Research and Innovation (MoHERI), Oman (Grant: RC/RG-SCI/CHEM/22/01) for funding. RI thanks HM's Trust Fund for a postdoctoral fellowship. LZ is grateful for the financial aid from the National Natural Science Foundation of China (62174160). WYW thanks the Hong Kong Research Grants Council (PolyU 15305320), the Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials (2019B121205002), the CAS-Croucher Funding Scheme for Joint Laboratories (ZH4A), Hong Kong Polytechnic University, Research Institute for Smart Energy (CDAQ) and the Endowed Professorship in Energy from Miss Clarea Au (847S) for the financial support. PRR is grateful to the Engineering and Physical Sciences Research Council (EPSRC) for funding (Grant EP/K004956/1).

Keywords

Europium(III)
photoluminescence
OLED

ASJC Scopus subject areas

General Chemistry

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10.1039/D3DT02147ELicence: CC BY

Cite this

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title = "Two new red emitting ternary europium(III) complexes with high photoluminescence quantum yields and exceptional performance in OLED devices",

abstract = "Two new organo-europium complexes (OEuCs) [Eu(btfa) 3(Bathphen)] (OEuC-1) and [Eu(tta) 3(Bathphen)] (OEuC-2) where btfa and tta are the anions of 4,4,4-trifluoro-1-phenyl-1,3-butanedione and 2-thenoyltrifluoroacetone while Bathphen = Bathophenanthroline have been synthesized and characterized. Both complexes in the solid state exhibit strong red emissions with photoluminescence quantum yields (PLQYs) of 80% ± 10%. These complexes were tested as dopants in the emitting layer (EML) to fabricate red organic light emitting diodes (R-OLEDs). Through device engineering involving the amalgamation of appropriate host materials and complexes, we have achieved exceptional overall R-OLED performance for an OEuC-2 based device, with maximum current efficiency (CE max) = 9.91 cd A −1, maximum power efficiency (PE max) = 9.15 lm W −1, maximum external quantum efficiency (EQE max.) = 6.24%, brightness (B) of 545 cd m −2, and (CIE) x,y = 0.620, 0.323",

keywords = "Europium(III), photoluminescence, OLED",

author = "Paul Raithby and Rashid Ilmi and Xiaofang Li and Nawal Al-Rashbi and Liang Zhou and Wai-Yeung Wong and Khan, {Muhammad S}",

note = "Acknowledgements: MSK acknowledges His Majesty's Trust Fund for Strategic Research (Grant No. SR/SQU/SCI/CHEM/21/01) and The Ministry of Higher Education, Research and Innovation (MoHERI), Oman (Grant: RC/RG-SCI/CHEM/22/01) for funding. RI thanks HM's Trust Fund for a postdoctoral fellowship. LZ is grateful for the financial aid from the National Natural Science Foundation of China (62174160). WYW thanks the Hong Kong Research Grants Council (PolyU 15305320), the Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials (2019B121205002), the CAS-Croucher Funding Scheme for Joint Laboratories (ZH4A), Hong Kong Polytechnic University, Research Institute for Smart Energy (CDAQ) and the Endowed Professorship in Energy from Miss Clarea Au (847S) for the financial support. PRR is grateful to the Engineering and Physical Sciences Research Council (EPSRC) for funding (Grant EP/K004956/1).",

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month = sep,

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doi = "10.1039/D3DT02147E",

language = "English",

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AU - Ilmi, Rashid

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AU - Al-Rashbi, Nawal

AU - Zhou, Liang

AU - Wong, Wai-Yeung

AU - Khan, Muhammad S

N1 - Acknowledgements: MSK acknowledges His Majesty's Trust Fund for Strategic Research (Grant No. SR/SQU/SCI/CHEM/21/01) and The Ministry of Higher Education, Research and Innovation (MoHERI), Oman (Grant: RC/RG-SCI/CHEM/22/01) for funding. RI thanks HM's Trust Fund for a postdoctoral fellowship. LZ is grateful for the financial aid from the National Natural Science Foundation of China (62174160). WYW thanks the Hong Kong Research Grants Council (PolyU 15305320), the Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials (2019B121205002), the CAS-Croucher Funding Scheme for Joint Laboratories (ZH4A), Hong Kong Polytechnic University, Research Institute for Smart Energy (CDAQ) and the Endowed Professorship in Energy from Miss Clarea Au (847S) for the financial support. PRR is grateful to the Engineering and Physical Sciences Research Council (EPSRC) for funding (Grant EP/K004956/1).

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N2 - Two new organo-europium complexes (OEuCs) [Eu(btfa) 3(Bathphen)] (OEuC-1) and [Eu(tta) 3(Bathphen)] (OEuC-2) where btfa and tta are the anions of 4,4,4-trifluoro-1-phenyl-1,3-butanedione and 2-thenoyltrifluoroacetone while Bathphen = Bathophenanthroline have been synthesized and characterized. Both complexes in the solid state exhibit strong red emissions with photoluminescence quantum yields (PLQYs) of 80% ± 10%. These complexes were tested as dopants in the emitting layer (EML) to fabricate red organic light emitting diodes (R-OLEDs). Through device engineering involving the amalgamation of appropriate host materials and complexes, we have achieved exceptional overall R-OLED performance for an OEuC-2 based device, with maximum current efficiency (CE max) = 9.91 cd A −1, maximum power efficiency (PE max) = 9.15 lm W −1, maximum external quantum efficiency (EQE max.) = 6.24%, brightness (B) of 545 cd m −2, and (CIE) x,y = 0.620, 0.323

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KW - photoluminescence

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U2 - 10.1039/D3DT02147E

DO - 10.1039/D3DT02147E

M3 - Article

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VL - 52

SP - 12885

EP - 12891

JO - Dalton Transactions

JF - Dalton Transactions

IS - 36

ER -

Two new red emitting ternary europium(III) complexes with high photoluminescence quantum yields and exceptional performance in OLED devices

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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

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Two new red emitting ternary europium(III) complexes with high photoluminescence quantum yields and exceptional performance in OLED devices

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

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

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