Haranath, D. and Sahai, Sonal and Joshi, Prachi (2008) Tuning of emission colors in zinc oxide quantum dots. Applied Physics Letters, 92 (23). 233113-1-233113-3. ISSN 1077-3118

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High brightness zinc oxide quantum dots were made with intentional alkali metal doping using quantum-confined atom model. The tuning of emission spectrum in the range of 480-562 nm was achieved by dispersing them in solvents with varying index of refraction. The observed emission bands are quite distinct from the nonstructured green emission of zinc oxide at 2.4 eV (515 nm) but are attributed to donor-acceptor recombination involving the zinc vacancy and Li(+)/Na(+), or the modifications assigned to the surface states by the surrounding medium. The photoluminescence shifts are found to be sensitive to refractive index term n(2)-1/2n(2)+1 useful for practical applications.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s American Institute of Physics.
Subjects: Applied Physics/Condensed Matter
Depositing User: Ms Neetu Chandra
Date Deposited: 06 Apr 2017 08:10
Last Modified: 06 Apr 2017 08:10
URI: http://npl.csircentral.net/id/eprint/2093

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