Single-composition Al 3+ -singly doped ZnO phosphors for UV-pumped warm white light-emitting diode applications

The development of full-visible-spectrum phosphors is essential for next-generation light-emitting devices with better light quality. Herein, we report on a novel broad-band-emitting phosphor based on single-composition Al-doped ZnO phosphors. Under the UV excitation of 325 nm, the ZnO : Al phosphor...

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Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2021-07, Vol.50 (26), p.9037-9050
Main Authors: Trung, D. Q., Quang, N. V., Tran, M. T., Du, N. V., Tu, N., Hung, N. D., Viet, Dao Xuan, Anh, D. D., Huy, P. T.
Format: Article
Language:English
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Summary:The development of full-visible-spectrum phosphors is essential for next-generation light-emitting devices with better light quality. Herein, we report on a novel broad-band-emitting phosphor based on single-composition Al-doped ZnO phosphors. Under the UV excitation of 325 nm, the ZnO : Al phosphor exhibits a full spectrum emission in the visible wavelength range from 400 to 800 nm with a CIE chromaticity coordinate of (0.42, 0.48), a quantum efficiency of 43%, a color rendering index (CRI) of 74, a correlated color temperature (CCT) value of 3873 K and an activation energy of 0.22 eV. A prototype of a UV-pumped warm WLED with a high CRI of 87 and a CCT of 4067 K has been achieved by using only this broad-band-emitting Al 3+ -doped ZnO phosphor. The obtained results indicate that the single-composition Al 3+ -singly doped warm white emitting phosphor is a promising candidate for UV-pump warm white light-emitting diodes.
ISSN:1477-9226
1477-9234
DOI:10.1039/D1DT00971K