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Title: Highly luminescent two dimensional excitons in atomically thin CdSe nanosheets

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.
Authors:
; ;  [1] ;  [2] ;  [3]
  1. School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Toshali Bhawan, Satyanagar, Bhubaneswar 751 007 (India)
  2. Department of Physics, National Institute of Science Education and Research, Sachivalaya marg, Bhubaneswar 751 005 (India)
  3. Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700 064 (India)
Publication Date:
OSTI Identifier:
22269188
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 18; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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