Highly luminescent two dimensional excitons in atomically thin CdSe nanosheets

Journal Article · Mon May 05 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4875912· OSTI ID:22269188

Halder, O.; Pradhani, A.; Sahoo, P. K. ^[1]; Satpati, B. ^[2]

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1. Department of Physics, National Institute of Science Education and Research, Sachivalaya marg, Bhubaneswar 751 005 (India)
2. Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700 064 (India)

Atomically thin Cadmium Selenide (CdSe) nanosheets have been synthesized using a surfactant mediated growth technique. The transmission electron microscopy studies confirm the presence of single layered nanosheets with thickness 1.31 nm and their stacking structures which are complemented by the small angle x-ray scattering measurements. The strongly bound and polarized character of two dimensional excitonic states with enhanced oscillator strength yielding distinct narrow blue luminescence has been observed from the CdSe nanosheets using room temperature based optical studies.

• OSTI ID: 22269188
• Journal Information: Applied Physics Letters, Vol. 104, Issue 18; 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

77 NANOSCIENCE AND NANOTECHNOLOGY
CADMIUM SELENIDES
LUMINESCENCE
NANOSTRUCTURES
OSCILLATOR STRENGTHS
SMALL ANGLE SCATTERING
TEMPERATURE RANGE 0273-0400 K
TRANSMISSION ELECTRON MICROSCOPY
TWO-DIMENSIONAL CALCULATIONS
X-RAY DIFFRACTION