Strong luminescent iridium complexes with C∧N-N structure in ligands and their potential in efficient and thermally stable phosphorescent OLEDs

Bao Xiu Mi; Peng Fei Wang; Zhi Qiang Gao; Chun Sing Lee; Shuit Jong Lee; Hui Ling Hong; Xiao Ming Chen; Man Shing Wong; Ping Fang Xia; Kok Wai Cheah; Chin Hsin Chen; Wei Huang

doi:10.1002/adma.200801604

Strong luminescent iridium complexes with C∧N-N structure in ligands and their potential in efficient and thermally stable phosphorescent OLEDs

Bao Xiu Mi, Peng Fei Wang, Zhi Qiang Gao, Chun Sing Lee, Shuit Jong Lee, Hui Ling Hong, Xiao Ming Chen, Man Shing Wong, Ping Fang Xia, Kok Wai Cheah, Chin Hsin Chen, Wei Huang

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

111 Scopus citations

Abstract

A new Ir complex with the ligand 1,4-bis(phenyl)phthalazine (BPPa) resembling sp ²-hybrid N adjacent to the chelating N atom was developed. The complexes were also studied for their potential in efficient and thermally stable phosphorescent organic light emitting diodes (OLED). The structure of Ir complex shows that the molecule has octahedral geometry, with three BPPa ligands cyclometalated to the central iridium atom. The only difference between the molecular structures of Ir(PPy) ₃ and Ir(PPya) ₃ arises from the atom adjacent to the chelating N in the ligand. Ir(BPPa) ₃ emits a red light peaked at 625 nm in a CH ₂Cl ₂ solution, with a PL quantum yield of 0.20 measured with Rhodamine B as a calibrations standard. The devices with 2, 5, and 10% of Ir(BPPa) ₃ show maximum external quantum efficiencies (EQE) of 4.0, 8.3, and 5.1%.

Original language	English
Pages (from-to)	339-343
Number of pages	5
Journal	Advanced Materials
Volume	21
Issue number	3
DOIs	https://doi.org/10.1002/adma.200801604
State	Published - 19 Jan 2009
Externally published	Yes

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Mi, B. X., Wang, P. F., Gao, Z. Q., Lee, C. S., Lee, S. J., Hong, H. L., Chen, X. M., Wong, M. S., Xia, P. F., Cheah, K. W., Chen, C. H., & Huang, W. (2009). Strong luminescent iridium complexes with C∧N-N structure in ligands and their potential in efficient and thermally stable phosphorescent OLEDs. Advanced Materials, 21(3), 339-343. https://doi.org/10.1002/adma.200801604

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title = "Strong luminescent iridium complexes with C∧N-N structure in ligands and their potential in efficient and thermally stable phosphorescent OLEDs",

abstract = "A new Ir complex with the ligand 1,4-bis(phenyl)phthalazine (BPPa) resembling sp 2-hybrid N adjacent to the chelating N atom was developed. The complexes were also studied for their potential in efficient and thermally stable phosphorescent organic light emitting diodes (OLED). The structure of Ir complex shows that the molecule has octahedral geometry, with three BPPa ligands cyclometalated to the central iridium atom. The only difference between the molecular structures of Ir(PPy) 3 and Ir(PPya) 3 arises from the atom adjacent to the chelating N in the ligand. Ir(BPPa) 3 emits a red light peaked at 625 nm in a CH 2Cl 2 solution, with a PL quantum yield of 0.20 measured with Rhodamine B as a calibrations standard. The devices with 2, 5, and 10% of Ir(BPPa) 3 show maximum external quantum efficiencies (EQE) of 4.0, 8.3, and 5.1%.",

author = "Mi, {Bao Xiu} and Wang, {Peng Fei} and Gao, {Zhi Qiang} and Lee, {Chun Sing} and Lee, {Shuit Jong} and Hong, {Hui Ling} and Chen, {Xiao Ming} and Wong, {Man Shing} and Xia, {Ping Fang} and Cheah, {Kok Wai} and Chen, {Chin Hsin} and Wei Huang",

year = "2009",

month = jan,

day = "19",

doi = "10.1002/adma.200801604",

language = "英语",

volume = "21",

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T1 - Strong luminescent iridium complexes with C∧N-N structure in ligands and their potential in efficient and thermally stable phosphorescent OLEDs

AU - Mi, Bao Xiu

AU - Wang, Peng Fei

AU - Gao, Zhi Qiang

AU - Lee, Chun Sing

AU - Lee, Shuit Jong

AU - Hong, Hui Ling

AU - Chen, Xiao Ming

AU - Wong, Man Shing

AU - Xia, Ping Fang

AU - Cheah, Kok Wai

AU - Chen, Chin Hsin

AU - Huang, Wei

PY - 2009/1/19

Y1 - 2009/1/19

N2 - A new Ir complex with the ligand 1,4-bis(phenyl)phthalazine (BPPa) resembling sp 2-hybrid N adjacent to the chelating N atom was developed. The complexes were also studied for their potential in efficient and thermally stable phosphorescent organic light emitting diodes (OLED). The structure of Ir complex shows that the molecule has octahedral geometry, with three BPPa ligands cyclometalated to the central iridium atom. The only difference between the molecular structures of Ir(PPy) 3 and Ir(PPya) 3 arises from the atom adjacent to the chelating N in the ligand. Ir(BPPa) 3 emits a red light peaked at 625 nm in a CH 2Cl 2 solution, with a PL quantum yield of 0.20 measured with Rhodamine B as a calibrations standard. The devices with 2, 5, and 10% of Ir(BPPa) 3 show maximum external quantum efficiencies (EQE) of 4.0, 8.3, and 5.1%.

AB - A new Ir complex with the ligand 1,4-bis(phenyl)phthalazine (BPPa) resembling sp 2-hybrid N adjacent to the chelating N atom was developed. The complexes were also studied for their potential in efficient and thermally stable phosphorescent organic light emitting diodes (OLED). The structure of Ir complex shows that the molecule has octahedral geometry, with three BPPa ligands cyclometalated to the central iridium atom. The only difference between the molecular structures of Ir(PPy) 3 and Ir(PPya) 3 arises from the atom adjacent to the chelating N in the ligand. Ir(BPPa) 3 emits a red light peaked at 625 nm in a CH 2Cl 2 solution, with a PL quantum yield of 0.20 measured with Rhodamine B as a calibrations standard. The devices with 2, 5, and 10% of Ir(BPPa) 3 show maximum external quantum efficiencies (EQE) of 4.0, 8.3, and 5.1%.

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EP - 343

JO - Advanced Materials

JF - Advanced Materials

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ER -

Strong luminescent iridium complexes with C∧N-N structure in ligands and their potential in efficient and thermally stable phosphorescent OLEDs

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