White light emitting Ho3+-doped CdS nanocrystal ingrained glass nanocomposites

We report the generation of white light from Ho3+ ion doped CdS nanocrystal ingrained borosilicate glass nanocomposites prepared by the conventional melt-quench method. Near visible 405 nm diode laser excited white light emission is produced by tuning the blue emission from the Ho3+ ions, green band...

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Published in:Applied physics letters 2015-02, Vol.106 (8)
Main Authors: Dey, Chirantan, Goswami, Madhumita, Karmakar, Basudeb
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Language:English
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creator Dey, Chirantan
Goswami, Madhumita
Karmakar, Basudeb
description We report the generation of white light from Ho3+ ion doped CdS nanocrystal ingrained borosilicate glass nanocomposites prepared by the conventional melt-quench method. Near visible 405 nm diode laser excited white light emission is produced by tuning the blue emission from the Ho3+ ions, green band edge, and orange-red surface-state emissions of the nanocrystalline CdS, which are further controlled by the size of the nanocrystals. The absorption and emission spectra evidenced the excitation of Ho3+ ions by absorption of photons emitted by the CdS nanocrystals. The high color rendering index (CRI = 84–89) and befitting chromaticity coordinates (x = 0.308–0.309, y = 0.326–0.338) of white light emission, near visible harmless excitation wavelength (405 nm), and high absorbance values at excitation wavelength point out that these glass nanocomposites may serve as a prominent candidate for resin free high power white light emitting diodes.
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title White light emitting Ho3+-doped CdS nanocrystal ingrained glass nanocomposites
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