Khan, Atif F. and Yadav, Ravishanker and Mukhopadhya, P. K. and Singh, Sukhvir and Dwivedi, Charu and Dutta, Viresh and Chawla, Santa (2011) Core–shell nanophosphor with enhanced NIR–visible upconversion as spectrum modifier for enhancement of solar cell efficiency. Journal of Nanoparticle Research , 13 (12). 6837-6846. ISSN 1388-0764

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Abstract

A distinct enhancement of upconversion luminescence from core to core/shell (C/S) structure under low flux near infrared (NIR) excitation at 976 nm has been achieved in lanthanide (Er3+, Yb3+)-doped NaYF4 core with undoped NaYF4 shell nanoparticles (NP). A green chemistry approach has been taken to synthesize monodisperse monophasic C/S NP with the core (~20 nm) and shell (~5 nm) crystallizing into cubic phase. Hydrophobic C/S NP have been further made hydrophilic by coating a transparent SHMP layer without affecting luminescence. C/S (NaYF4: Er, Yb/NaYF4) NP integrated dye-sensitized solar cell indicated 11.9% enhancement in overall conversion efficiency under AM 1.5 conditions, due to NIR–visible spectrum modification by fluorescent NPs. The results indicate great potential of such upconverting C/S nanophosphor in solar cell applications.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Springer Verlag.
Uncontrolled Keywords:	Upconversion photoluminescence; Core-shell nanoparticle; Solar cells; Spectrum modification; Rare earth ions; Energy conversion
Subjects:	Chemistry Materials Science Nanoscience/ Nanotechnology Physics
Divisions:	UNSPECIFIED
Depositing User:	Mr. Abhishek Yadav
Date Deposited:	20 Nov 2012 08:25
Last Modified:	20 Nov 2012 08:25
URI:	http://npl.csircentral.net/id/eprint/824

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