Nano Archive

Core-shell nanophosphor with enhanced NIR-visible upconversion as spectrum modifier for enhancement of solar cell efficiency

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). pp. 6837-6846.

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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 (Er 3+ , Yb 3+ )-doped NaYF 4 core with undoped NaYF 4 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 (NaYF 4 : Er, Yb/NaYF 4 ) 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
ID Code:11443
Deposited By:Prof. Alexey Ivanov
Deposited On:05 Jan 2012 09:29
Last Modified:05 Jan 2012 09:42

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