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- W4312796585 abstract "Controllably optimizing excited-state characteristics is crucial for luminescent nanoclusters but remains a formidable challenge. Herein, we report an effective “ligand-induced asymmetrization” strategy for constructing thermally activated delayed fluorescence-featured cubic Cu 4 I 4 nanoclusters with asymmetric configurations, named [tBCzDBFDP] 2 Cu 4 I 4 and [PTZDBFDP] 2 Cu 4 I 4 . Through changing 3,6-di- tert -butyl-carbazole (tBCz) to phenothiazine (PTZ) with a stronger electron-donating effect, emission color is tuned from greenish blue of [tBCzDBFDP] 2 Cu 4 I 4 to yellow of [PTZDBFDP] 2 Cu 4 I 4 , as well as the triplet locally excited state of the former to the triplet charge transfer state of the latter. Temperature-correlated spectroscopic investigation indicates that in terms of triplet quenching suppression, [tBCzDBFDP] 2 Cu 4 I 4 is superior to [PTZDBFDP] 2 Cu 4 I 4 , in accord with the stabilities of their triplet locally excited state and triplet charge transfer state. As a consequence, these asymmetric Cu 4 I 4 nanocubes endowed their cluster light-emitting diodes with the external quantum efficiencies beyond 12% for sky blue and 8% for yellow. These results suggest the significance and effectiveness of ligand engineering for optoelectronic nanoclusters." @default.
- W4312796585 created "2023-01-05" @default.
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- W4312796585 date "2022-01-01" @default.
- W4312796585 modified "2023-09-28" @default.
- W4312796585 title "Sky Blue and Yellow Cluster Light-Emitting Diodes Based on Asymmetric Cu <sub>4</sub> I <sub>4</sub> Nanocubes" @default.
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- W4312796585 doi "https://doi.org/10.34133/research.0005" @default.
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