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Three novel Iridium(III) complexes containing double chiral atoms for OLEDs
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  • Gan Cheng,
  • Junjian Lu,
  • Li-ya Zhu,
  • Gaozhao Lu
Gan Cheng
Hunan University of Humanities Science and Technology
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Junjian Lu
Hunan University of Humanities Science and Technology

Corresponding Author:[email protected]

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Li-ya Zhu
Hunan University of Humanities Science and Technology
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Gaozhao Lu
Shenzhen Institute of Information Technology
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Abstract

Chiral Iridium complexes are very important for the preparation of circularly polarized light emitting diodes (CP-OLEDs). Three novel Iridium(III) complexes, Ir(dnfppy)2(Cl/pyrrole), Ir(dfppy)2(dpp) and Ir(tfmqz)2(sdpp) have been synthesized and characterized, respectively. These Iridium(III) complexes emitted deep-blue, blue and red photoluminescence with high quantum yields, for ((Ir(dnfppy)2(Cl/Pyrrole): λmax=447 nm, F=62.4%; Ir(dfppy)2(dpp): λmax=467 nm, F= 25%; Ir(tfmqz)2(sdpp): λmax=609 nm, F=73.7%). Compared with Ir(dnfppy)2(Cl/pyrrole), HOMO energy level of Ir(dfppy)2(dpp) and Ir(tfmqz)2(sdpp) was calculated to be −5.71/-5.73 eV, and LUMO energy level increased to be -2.75/-3.36 eV, respectively. CD spectra of two pairs of the enantiomers for Ir(dfppy)2(dpp) or Ir(tfmqz)2(sdpp) displayed symmetry with opposite polarization between 300 and 600 nm. The maximum external quantum efficiency (EQEmax) of OLEDs based on Ir(tfmpqz)2(sddp) was 13.8%, showing a relatively low efficiency roll-off with the EQE of 10.7% at 5000 cd/m2.
27 Feb 2023Submitted to Micro & Nano Letters
28 Feb 2023Submission Checks Completed
28 Feb 2023Assigned to Editor
07 Mar 2023Reviewer(s) Assigned
29 Mar 2023Review(s) Completed, Editorial Evaluation Pending
02 Apr 2023Editorial Decision: Revise Major
06 Apr 20231st Revision Received
12 Apr 2023Submission Checks Completed
12 Apr 2023Assigned to Editor
16 Apr 2023Reviewer(s) Assigned
18 Apr 2023Review(s) Completed, Editorial Evaluation Pending
24 Apr 2023Editorial Decision: Revise Minor
28 Apr 20232nd Revision Received
01 May 2023Submission Checks Completed
01 May 2023Assigned to Editor
07 May 2023Reviewer(s) Assigned
12 May 2023Review(s) Completed, Editorial Evaluation Pending
14 May 2023Editorial Decision: Revise Minor
15 May 20233rd Revision Received
16 May 2023Submission Checks Completed
16 May 2023Assigned to Editor
21 May 2023Reviewer(s) Assigned
22 May 2023Review(s) Completed, Editorial Evaluation Pending
23 May 2023Editorial Decision: Accept