Speaker
Description
Development of electroluminescent quantum dots (EL-QDs) has been retarded from their trade-off between processability and electrical property. Long alkyl chain-based ligands have been applied to achieve dispersion stability in organic solvents; insulating nature of the alkyl chain is detrimental to device performances. To circumvent this issue, we selected a new series of adamantane-based ligands for surface modification of EL-QDs. Our strategy was successfully applied to ZnSeTe-based blue-emitting EL-QDs. Compact and bulky features of adamantane resulted in close-packing of the quantum dots in thin film, concomitantly guaranteeing high dispersibility in organic solvents. An electroluminescent device containing the adamantane-modified ZnSeTe-based quantum dot showed lowered driving voltage, 14-fold improved luminance, and 13-fold increased lifetime compared to that with a conventional dodecane-modified one as a control.
References
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| Keywords | Ligand Engineering, Quantum Dots, Light Emitting Diode |
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