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Issue 41, 2018
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Thin-shell CdSe/ZnCdS core/shell quantum dots and their electroluminescent device application

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Abstract

To reduce the charge injection barrier, we attempt to synthesize thin-shell CdSe/ZnxCd1−xS core/shell quantum dots (QDs) in this work. A low-temperature (90–115 °C) synthetic scheme was developed for highly luminescent CdSe/ZnxCd1−xS core/shell QDs by employing short-chain tert-dodecanethiol as the ligand and low-boiling xylene or octane as the solvent. Thiol-capped CdSe/2ZnxCd1−xS core/shell QDs with two monolayers of the shells were directly synthesized in open air, including CdSe/2ZnS, CdSe/2Zn2/3Cd1/3S, CdSe/2Zn1/2Cd1/2S, CdSe/2Zn1/3Cd2/3S, CdSe/2CdS, and CdSe/1CdS/1ZnS core/shell QDs. These short-chain ligand capped and thin-shell QDs were used as the emitting layers to fabricate quantum dot light emitting diodes (QD-LEDs). The results showed that QDs coated with an alloyed Zn0.5Cd0.5S shell possess the optimal photoluminescence (PL) and electroluminescence (EL) properties as well as a maximum current efficiency of 12.5 cd A−1.

Graphical abstract: Thin-shell CdSe/ZnCdS core/shell quantum dots and their electroluminescent device application

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Publication details

The article was received on 06 Aug 2018, accepted on 10 Sep 2018 and first published on 12 Sep 2018


Article type: Paper
DOI: 10.1039/C8TC03906B
Citation: J. Mater. Chem. C, 2018,6, 11104-11110
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    Thin-shell CdSe/ZnCdS core/shell quantum dots and their electroluminescent device application

    S. Wei, Y. Liu, M. Ma, Y. Wu, L. Huang and D. Pan, J. Mater. Chem. C, 2018, 6, 11104
    DOI: 10.1039/C8TC03906B

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