White light emitting Ho{sup 3+}-doped CdS nanocrystal ingrained glass nanocomposites

Journal Article · Mon Feb 23 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4913665· OSTI ID:22412716

Dey, Chirantan; Karmakar, Basudeb ^[1]; Goswami, Madhumita ^[2]

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1. Glass Science and Technology Section, Glass Division, CSIR-Central Glass and Ceramic Research Institute, 196, Raja S. C. Mullick Road, Kolkata 700032 (India)
2. Glass and Advanced Materials Division, Bhaba Atomic Research Centre, Trombay, Mumbai 400085 (India)

We report the generation of white light from Ho{sup 3+} 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 Ho{sup 3+} 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 Ho{sup 3+} 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.

• OSTI ID: 22412716
• Journal Information: Applied Physics Letters, Vol. 106, Issue 8; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION SPECTRA
BOROSILICATE GLASS
CADMIUM SULFIDES
COLOR
CRYSTALS
DOPED MATERIALS
EMISSION SPECTRA
EXCITATION
HOLMIUM IONS
LIGHT EMITTING DIODES
NANOCOMPOSITES
NANOSTRUCTURES
RESINS
SURFACES
VISIBLE RADIATION