Journal
JOURNAL OF LUMINESCENCE
Volume 218, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2019.116847
Keywords
Dinuclear Ir(III)-Complex; Aggregation-induced phosphorescent enhancement; NIR luminescence; Polymer light-emitting diode
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Funding
- National Natural Science Foundation [21373160, 21173165]
- MOE Laboratory of Bioinorganic and Synthetic Chemistry
- Postdoctoral Science Foundation [2018M633564]
- Fundamental Research Fund for the Central Universities [G2018KY0308]
- Graduate Innovation and Creativity Fund of Northwest University in China [YZZ17127]
- State Key Laboratory of Structural Chemistry
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In this work, for the obtained NIR-emitting dinuclear [(iqbt)(2)Ir-L-n-Ir(iqbt)(2)] complexes (n = 1-3, 1-3; Hiqbt = 1-(benzo[b]-thiophen-2-yl)-isoquinoline) with the bridging linkages of three flexible bis-(NO)-O-boolean AND-Schiff-base ligands H2Ln, their obvious aggregation-induced phosphorescent enhancement (AIPE) behaviors in powder-form solid or MeCN-H2O mixture are observed, respectively. Moreover, based on the AIPE-switched NIR phosphorescence (Phi(em) = 0.11 and tau = 0.27 mu s) of the diiridium complex 1 without electron-donating substituents in the aggregation state, its solution-processed NIR-PLED is reliably realized, exhibiting the attractive electroluminescent performance with both eta(max)(EQE) = 1.08% and almost negligible efficiency-roll-off.
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