Hybrid Composites of Quantum Dots, Monolayer WSe2, and Ag Nanodisks for White Light-Emitting Diodes

Chiao-Yun Chang, Cheng-Li Yu, Chen-An Lin, Hsiang-Ting Lin, Andrew Boyi Lee, Zheng-Zhe Chen, Li-Syuan Lu, Wen-Hao Chang, Hao-Chung Kuo, Min-Hsiung Shih*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We investigated hybrid zero-dimensional core-shell CdSe/ZnS quantum dot (QD)/two-dimensional monolayer WSe2 semiconductors with an Ag nanodisk (ND) for manipulating plasmonic-enhanced photoluminescence (PL) and color conversion efficiency. The absorption spectrum of the local surface plasmon resonance (LSPR) effectively overlaps with that of QDs or monolayer WSe2 to considerably enhance PL. The broad absorption spectrum of the LSPR simultaneously overlapped with the emission spectrum of QDs and the absorption spectrum of excitons in WSe2 to enhance the color conversion efficiency. The highest efficiency of color conversion from QDs to WSe2 with Ag ND was 53%. In the future, hybrid QD/transition metal dichalcogenide light emitters could be further integrated with GaN-based white light-emitting diodes to manipulate the color temperature and expand the color gamut to develop a miniature white light-emitting diode.

Original languageEnglish
Pages (from-to)6855-6862
Number of pages8
JournalACS Applied Nano Materials
Volume3
Issue number7
DOIs
StatePublished - 24 Jul 2020

Keywords

  • color conversion
  • Light emitter
  • local surface plasmon resonance
  • quantum dots
  • transition metal dichalcogenides

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