Iridium(<scp>iii</scp>) phosphors with bis(diphenylphorothioyl)amide ligand for efficient green and sky-blue OLEDs with EQE of nearly 28%

Xia, Jing-Cheng; Liang, Xiao; Yan, Zhi‐Ping; Wu, Zheng‐Guang; Zhao, Yue; Zheng, You‐Xuan; Zhang, Wenwei

doi:10.1039/c8tc02265h

Cited by 23 publications

(8 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Herein, we incorporate S atoms into the original tpip framework bearing a novel S^Ir^S coordination structure and obtain three Ir(III) complexes that are qualified as standard green emitters. The unique structural and electronic properties of S atoms could potentially alter the photophysical and electrochemical properties of the corresponding complexes . Because S atom is known to be able to bind strongly with a transition metal, the unique coordination S^Ir^S structure could also help improve the stability of the corresponding complexes.…”

Section: Introductionmentioning

confidence: 99%

Fast Synthesis of Iridium(III) Complexes Incorporating a Bis(diphenylphorothioyl)amide Ligand for Efficient Pure Green OLEDs

Liang

Zhang

Yan

et al. 2019

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Bis(diphenylphorothioyl)amide (Stpip) containing phosphor–sulfur (PS) bonds was used as an ancillary ligand for three pure green iridium(III) emitters Ir1, Ir2, and Ir3, which were synthesized in few minutes at room temperature with high reaction yields above 70%. All these complexes show good thermal stability and excellent sublimation yields of around 80–90%, which are considered beneficial for industry practical production and organic light-emitting diode (OLED) fabrication. The emission profiles of these complexes meet the green standards of CIE1931 with coordinates of (0.33, 0.63), (0.33, 0.62), and (0.34, 0.62), respectively, and high photoluminescence quantum yields of up to 98% are achieved. Utilizing these complexes as emissive dopants, these OLEDs exhibited high current efficiency up to 91.94 cd A–1, external quantum efficiency up to 26.52%, and power efficiency up to 92.60 lm W–1 with very small efficiency roll-off, without adopting internal or external out-coupling methods. These results indicate that Stpip is a potentially suitable ligand scaffold for highly efficient phosphorescent Ir(III) emitters that endow corresponding OLEDs with high efficiency and small roll-off.

show abstract

Section: Introductionmentioning

confidence: 99%

Fast Synthesis of Iridium(III) Complexes Incorporating a Bis(diphenylphorothioyl)amide Ligand for Efficient Pure Green OLEDs

Liang

Zhang

Yan

et al. 2019

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

show abstract

“…The tpip and Stpip ligands were prepared according to previous research studies. 21,28 The main ligand 4tfptp was synthesized through the selective Pd-catalyzed Suzuki coupling reaction of 4-trifluoromethylphenylboronic acid and 4-chloro-1-benzothiophene. Then, the chloro-bridged dimer was obtained by the reaction of the main ligand and IrCl 3 ·3H 2 O.…”

Section: Resultsmentioning

confidence: 99%

Iridium(iii) complexes incorporating thieno[2,3-d]pyrimidine units for efficient orange-to-yellow electroluminescence with low efficiency roll-off

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…The ligands 3/4-ppy and tpip/stpip and Ir(III) chloro-bridged dimers were synthesized according to previous reports. − …”

Section: Experimental Sectionmentioning

confidence: 99%

“…The nitrogen heterocycles of the cyclometalated ligands can influence the electronic states and change the photophysical properties of the phosphors to give green and red emissions. To exploit more diverse molecular structures, tetraphenyl imidodiphosphinate (tpip) and bis(diphenylphorothioyl)amide (stpip) ancillary ligands were further introduced, which were developed by our group previously . Herein, 2-(3/4-(pentafluorosulfanyl)phenyl)pyridine (3/4-ppy) species were chosen as representatives of cyclometalated ligands and the four complexes Ir5 – Ir8 were obtained (Scheme ).…”

Section: Introductionmentioning

confidence: 99%

Syntheses, Crystal Structures, and Photoluminescence of a Series of Iridium(III) Complexes Containing the Pentafluorosulfanyl Group

Luo

Yan

et al. 2019

Organometallics

Self Cite

View full text Add to dashboard Cite

Eight neutral iridium(III) complexes (Ir1−Ir8) containing an electronwithdrawing pentafluorosulfanyl (−SF 5 ) group on cyclometalated ligands with different ancillary ligands were synthesized and investigated. 2-(3/4-(Pentafluorosulfanyl)phenyl)pyrimidine (for Ir1 and Ir2), 1-(3/4-(pentafluorosulfanyl)phenyl)isoquinoline (for Ir3 and Ir4), and 2-(3/4-(pentafluorosulfanyl)phenyl)pyridine (for Ir5−Ir8) were chosen as cyclometalated ligands and 2,2,6,6-tetramethylheptane-3,5-dione (for Ir1−Ir4), tetraphenylimidodiphosphinate (for Ir5 and Ir6), and bis(diphenylphorothioyl)amide (for Ir7 and Ir8) were used as ancillary ligands. The crystal structures of Ir1, Ir3, Ir4, Ir6, and Ir8 also confirmed the identities of these complexes. Complexes Ir1, Ir2, and Ir5−Ir8 exhibit sky blue to green emissions (480−533 nm) with high photoluminescence quantum efficiency yields up to 94.7% in CH 2 Cl 2 solution at room temperature. Complexes Ir3 and Ir4 are red phosphors (λ max = 607 nm, Φ = 76.8% for Ir3 and λ max = 627 nm, Φ = 49.2% for Ir4, respectively). Theoretical calculations were carried out to provide a further study of the orbital distributions and electronic states of eight Ir(III) complexes. Additionally, ion detection studies reveal that Ir2 has the potential for detecting Hg 2+ ion.

show abstract

Iridium(iii) phosphors with bis(diphenylphorothioyl)amide ligand for efficient green and sky-blue OLEDs with EQE of nearly 28%

Abstract: A ligand, bis(diphenylphorothioyl)amide, containing phosphorus–sulfur (PS) bonds was synthesized as an ancillary ligand for four green or sky-blue iridium(iii) complexes with high quantum yields, good thermal stabilities and satisfactory device performances with EQE of nearly 28%.

Cited by 23 publications

References 42 publications

Fast Synthesis of Iridium(III) Complexes Incorporating a Bis(diphenylphorothioyl)amide Ligand for Efficient Pure Green OLEDs

Fast Synthesis of Iridium(III) Complexes Incorporating a Bis(diphenylphorothioyl)amide Ligand for Efficient Pure Green OLEDs

Iridium(iii) complexes incorporating thieno[2,3-d]pyrimidine units for efficient orange-to-yellow electroluminescence with low efficiency roll-off

Syntheses, Crystal Structures, and Photoluminescence of a Series of Iridium(III) Complexes Containing the Pentafluorosulfanyl Group

Contact Info

Product

Resources

About