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

Rashid Ilmi; Xiaofang Li; Nawal K. Al Rasbi; Liang Zhou; Wai Yeung Wong; Paul R. Raithby; 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

Rashid Ilmi, Xiaofang Li, Nawal K. Al Rasbi, Liang Zhou, Wai Yeung Wong (Corresponding Author), Paul R. Raithby, Muhammad S. Khan

Research output: Journal article publication › Journal article › Academic research › peer-review

14 Citations (Scopus)

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
DOIs	https://doi.org/10.1039/d3dt02147e
Publication status	Published - 15 Aug 2023

ASJC Scopus subject areas

Inorganic Chemistry

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10.1039/d3dt02147e

http://hdl.handle.net/10397/107900

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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 (CEmax) = 9.91 cd A−1, maximum power efficiency (PEmax) = 9.15 lm W−1, maximum external quantum efficiency (EQEmax.) = 6.24%, brightness (B) of 545 cd m−2, and (CIE)x,y = 0.620, 0.323",

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AU - Ilmi, Rashid

AU - Li, Xiaofang

AU - Al Rasbi, Nawal K.

AU - Zhou, Liang

AU - Wong, Wai Yeung

AU - Raithby, Paul R.

AU - Khan, Muhammad S.

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

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