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Ultranarrow and Widely Tunable Mn2+-Induced Photoluminescence from Single Mn-Doped Nanocrystals of ZnS-CdS Alloys

Abhijit Hazarika, Arunasish Layek, Suman De, Angshuman Nag, Saikat Debnath, Priya Mahadevan, Arindam Chowdhury, and D. D. Sarma
Phys. Rev. Lett. 110, 267401 – Published 28 June 2013
Physics logo See Focus story: A Quantum Dot Shows Its True Colors
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Abstract

Extensively studied Mn-doped semiconductor nanocrystals have invariably exhibited photoluminescence over a narrow energy window of width 150meV in the orange-red region and a surprisingly large spectral width (180meV), contrary to its presumed atomic-like origin. Carrying out emission measurements on individual single nanocrystals and supported by ab initio calculations, we show that Mn PL emission, in fact, can (i) vary over a much wider range (370meV) covering the deep green—deep red region and (ii) exhibit widths substantially lower (6075meV) than reported so far, opening newer application possibilities and requiring a fundamental shift in our perception of the emission from Mn-doped semiconductor nanocrystals.

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  • Received 2 August 2012

DOI:https://doi.org/10.1103/PhysRevLett.110.267401

© 2013 American Physical Society

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A Quantum Dot Shows Its True Colors

Published 28 June 2013

Nanoparticles previously thought to glow in only a single color turn out to produce a rainbow of hues, making them more useful for highly efficient electronic displays.

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Authors & Affiliations

Abhijit Hazarika1, Arunasish Layek2, Suman De2, Angshuman Nag1, Saikat Debnath3, Priya Mahadevan3, Arindam Chowdhury2, and D. D. Sarma1,4,5,*

  • 1Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India
  • 2Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
  • 3Department of Condensed Matter Physics and Material Science, S. N. Bose National Centre for Basic Sciences, Kolkata 700098, India
  • 4Council of Scientific and Industrial Research-Network of Institutes for Solar Energy (CSIR-NISE), Anusandhan Bhawan, New Delhi 110001, India
  • 5Department of Physics and Astronomy, Uppsala University, Box-516, SE-75120 Uppsala, Sweden

  • *sarma@sscu.iisc.ernet.in

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Issue

Vol. 110, Iss. 26 — 28 June 2013

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