Blinking suppression of CdTe quantum dots on epitaxial graphene and the analysis with Marcus electron transfer

Journal Article · Mon Aug 25 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4893667· OSTI ID:22310965

Hirose, Takuya; Tamai, Naoto ^[1]; Kutsuma, Yasunori; Kurita, Atsusi; Kaneko, Tadaaki ^[2]

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1. Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337 (Japan)
2. Department of Physics, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337 (Japan)

We have prepared epitaxial graphene by a Si sublimation method from 4H-SiC. Single-particle spectroscopy of CdTe quantum dots (QDs) on epitaxial graphene covered with polyvinylpyrrolidone (PVP) or polyethylene glycol (PEG) showed the suppression of luminescence blinking and ∼10 times decreased luminescence intensity as compared with those on a glass. The electronic coupling constant, H{sub 01}, between CdTe QDs and graphene was calculated to be (3.3 ± 0.4) × 10{sup 2 }cm{sup −1} in PVP and (3.7 ± 0.8) × 10{sup 2 }cm{sup −1} in PEG based on Marcus theory of electron transfer and Tang-Marcus model of blinking with statistical distribution.

• OSTI ID: 22310965
• Journal Information: Applied Physics Letters, Vol. 105, Issue 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CADMIUM TELLURIDES
COUPLING CONSTANTS
DISTRIBUTION
ELECTRON TRANSFER
EPITAXY
GLASS
GRAPHENE
LUMINESCENCE
POLYETHYLENE GLYCOLS
PVP
QUANTUM DOTS
SILICON CARBIDES
SPECTROSCOPY
SUBLIMATION