Phosphorescent PdII–PdII Emitter‐Based Red OLEDs with an EQEmax of 20.52%
Abstract Three dinuclear Pd(II) complexes (1, 2, and 3) with intense red phosphorescence at room temperature are here synthesized using strong ligand field strength compounds. All three complexes are characterized by nuclear magnetic resonance, high‐resolution mass spectrometry, and elemental analys...
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| Format: | Article |
| Language: | English |
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Wiley
2024-09-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202404621 |
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| author | Lige Qiao Xiangjun Kong Kechun Li Lequn Yuan Yunjun Shen Yuzhen Zhang Liang Zhou |
| author_facet | Lige Qiao Xiangjun Kong Kechun Li Lequn Yuan Yunjun Shen Yuzhen Zhang Liang Zhou |
| author_sort | Lige Qiao |
| collection | DOAJ |
| description | Abstract Three dinuclear Pd(II) complexes (1, 2, and 3) with intense red phosphorescence at room temperature are here synthesized using strong ligand field strength compounds. All three complexes are characterized by nuclear magnetic resonance, high‐resolution mass spectrometry, and elemental analyses. Complexes 2 and 3 are characterized by single‐crystal X‐ray diffraction. The crystalline data of 2 and 3 reveal complex double‐layer structures, with Pd–Pd distances of 2.8690(9) Å and 2.8584(17) Å, respectively. Furthermore, complexes 1, 2, and 3 show phosphorescence at room temperature in their solid states at the wavelengths of 678, 601, and 672 nm, respectively. In addition, they show phosphorescence at 634, 635, and 582 nm, respectively, in the 2 wt.% (PMMA) films, and phosphorescence at 670, 675, and 589 nm, respectively, in the deoxygenated CH2Cl2 solutions. Among three complexes, complex 1 shows red emission at 634 nm with phosphorescent quantum yield Ф = 67% in the 2 wt.% PMMA film. Furthermore, complex 1‐based organic light‐emitting diode is fabricated using a vapor‐phase deposition process, and their maximum external quantum efficiency reaches 20.52%, which is the highest percentage obtained by using the dinuclear Pd(II) complex triplet emitters with the CIE coordinates of (0.62, 0.38). |
| format | Article |
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| institution | OA Journals |
| issn | 2198-3844 |
| language | English |
| publishDate | 2024-09-01 |
| publisher | Wiley |
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| series | Advanced Science |
| spelling | doaj-art-6d2b488a5ccf499abd470c70df23ad592025-08-20T01:55:16ZengWileyAdvanced Science2198-38442024-09-011135n/an/a10.1002/advs.202404621Phosphorescent PdII–PdII Emitter‐Based Red OLEDs with an EQEmax of 20.52%Lige Qiao0Xiangjun Kong1Kechun Li2Lequn Yuan3Yunjun Shen4Yuzhen Zhang5Liang Zhou6Key Laboratory of Chemistry and Engineering of Forest Products State Ethnic Affairs Commission Guangxi Key Laboratory of Chemistry and Engineering of Forest Products Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products School of Chemistry and Chemical Engineering Guangxi Minzu University Nanning Guangxi 530006 ChinaKey Laboratory of Chemistry and Engineering of Forest Products State Ethnic Affairs Commission Guangxi Key Laboratory of Chemistry and Engineering of Forest Products Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products School of Chemistry and Chemical Engineering Guangxi Minzu University Nanning Guangxi 530006 ChinaKey Laboratory of Chemistry and Engineering of Forest Products State Ethnic Affairs Commission Guangxi Key Laboratory of Chemistry and Engineering of Forest Products Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products School of Chemistry and Chemical Engineering Guangxi Minzu University Nanning Guangxi 530006 ChinaKey Laboratory of Chemistry and Engineering of Forest Products State Ethnic Affairs Commission Guangxi Key Laboratory of Chemistry and Engineering of Forest Products Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products School of Chemistry and Chemical Engineering Guangxi Minzu University Nanning Guangxi 530006 ChinaKey Laboratory of Chemistry and Engineering of Forest Products State Ethnic Affairs Commission Guangxi Key Laboratory of Chemistry and Engineering of Forest Products Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products School of Chemistry and Chemical Engineering Guangxi Minzu University Nanning Guangxi 530006 ChinaKey Laboratory of Chemistry and Engineering of Forest Products State Ethnic Affairs Commission Guangxi Key Laboratory of Chemistry and Engineering of Forest Products Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products School of Chemistry and Chemical Engineering Guangxi Minzu University Nanning Guangxi 530006 ChinaState Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. ChinaAbstract Three dinuclear Pd(II) complexes (1, 2, and 3) with intense red phosphorescence at room temperature are here synthesized using strong ligand field strength compounds. All three complexes are characterized by nuclear magnetic resonance, high‐resolution mass spectrometry, and elemental analyses. Complexes 2 and 3 are characterized by single‐crystal X‐ray diffraction. The crystalline data of 2 and 3 reveal complex double‐layer structures, with Pd–Pd distances of 2.8690(9) Å and 2.8584(17) Å, respectively. Furthermore, complexes 1, 2, and 3 show phosphorescence at room temperature in their solid states at the wavelengths of 678, 601, and 672 nm, respectively. In addition, they show phosphorescence at 634, 635, and 582 nm, respectively, in the 2 wt.% (PMMA) films, and phosphorescence at 670, 675, and 589 nm, respectively, in the deoxygenated CH2Cl2 solutions. Among three complexes, complex 1 shows red emission at 634 nm with phosphorescent quantum yield Ф = 67% in the 2 wt.% PMMA film. Furthermore, complex 1‐based organic light‐emitting diode is fabricated using a vapor‐phase deposition process, and their maximum external quantum efficiency reaches 20.52%, which is the highest percentage obtained by using the dinuclear Pd(II) complex triplet emitters with the CIE coordinates of (0.62, 0.38).https://doi.org/10.1002/advs.202404621dinuclear palladium complexesorganic light‐emitting diodephosphorescencepolymethylmethacrylate |
| spellingShingle | Lige Qiao Xiangjun Kong Kechun Li Lequn Yuan Yunjun Shen Yuzhen Zhang Liang Zhou Phosphorescent PdII–PdII Emitter‐Based Red OLEDs with an EQEmax of 20.52% Advanced Science dinuclear palladium complexes organic light‐emitting diode phosphorescence polymethylmethacrylate |
| title | Phosphorescent PdII–PdII Emitter‐Based Red OLEDs with an EQEmax of 20.52% |
| title_full | Phosphorescent PdII–PdII Emitter‐Based Red OLEDs with an EQEmax of 20.52% |
| title_fullStr | Phosphorescent PdII–PdII Emitter‐Based Red OLEDs with an EQEmax of 20.52% |
| title_full_unstemmed | Phosphorescent PdII–PdII Emitter‐Based Red OLEDs with an EQEmax of 20.52% |
| title_short | Phosphorescent PdII–PdII Emitter‐Based Red OLEDs with an EQEmax of 20.52% |
| title_sort | phosphorescent pdii pdii emitter based red oleds with an eqemax of 20 52 |
| topic | dinuclear palladium complexes organic light‐emitting diode phosphorescence polymethylmethacrylate |
| url | https://doi.org/10.1002/advs.202404621 |
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