Kumar, Vineet and Khan, A. F. and Chawla, Santa (2013) Intense red-emitting multi-rare-earth doped nanoparticles of YVO4 for spectrum conversion towards improved energy harvesting by solar cells. Journal of Physics D: Applied Physics, 46 (36). 365101-1-365101-9. ISSN 0022-3727

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Abstract

Yttrium vanadate nano-particles doped with single and multi ions (Sm3+, Eu3+, Bi3+) have been successfully synthesized at room temperature by optimized co-precipitation method. Doped orthovanadate forms monophasic nanocrystals in the 10-50 nm size range. Photoluminescence (PL) excitation shows broad band in the range 250-350 nm due to vanadate absorption and sharp peaks in the range of 390-470 nm due to f-f transitions of Sm3+/Eu3+ and emission in intense red/orange (614, 645, 699 nm). The nanoparticles can efficiently convert UV and blue photons (250-470 nm) to intense red and orange light that can be harnessed by both Si and dye sensitized solar cells for photovoltaic conversion. PL and time-resolved decay suggest that excitation and charge transfer between host, dopant and co-dopants play a profound role in the photophysical processes of multi-ion doped yttrium vanadate nanophosphor. Thin films of such nanophosphor exhibit 80-90% transparency in the visible range. Nanophosphor films convert UV to visible leading to better photon harvesting by solar cells.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s IOP Publishing.
Subjects:	Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	22 Jul 2020 09:30
Last Modified:	22 Jul 2020 09:30
URI:	http://npl.csircentral.net/id/eprint/3160

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