Luminescence properties of Mn4+-doped CaAl2O

Authors

  • Thi Kim Chi Nguyen*
  • Duy Hung Nguyen
  • Tan Vinh Le College of Natural Sciences, Can Tho University
  • Thanh Vu Tran
  • Chi Nguyen Vo
  • Thi Kim Trung Pham

Abstract

Akin to the enormous number of discoveries made through luminescence materials, rare earth-doped aluminates are attractive materials for a new class of next generation displays and lighting devices that show merits like high chemical stability, brightness, and flexible industrial processing ability. A series of Mn4+-activated CaAl2O4 (CAO) compounds were synthesized by co-precipitation to seek a candidate for a red-emitting phosphor to be employed in a white LED. The crystal structure, morphology, and fluorescence properties of the as-obtained phosphors were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence (PL). The deep red luminescence of Mn4+ in CaAl2O4 is reported and discussed. The excitation spectrum exhibited broadband emission between 260 and 550 nm with three peaks dominating at 320 nm due to the transition of 4A2->4T1. The emission spectra between 600 to 720 nm displays an overwhelming emission peak at 654 nm owing to the 2E->4A2 transition of Mn4+ ion. This research demonstrates the great promise of CaAl2O4:Mn4+ as a commercial red phosphor in warm white LEDs and opens up new avenues for the exploration of novel non-rare-earth red-emitting phosphors.

Keywords:

CaAl2O4:Mn4 , co-precipitation, phosphors

DOI:

https://doi.org/10.31276/VJSTE.63(3).03-07

Classification number

2.1

Author Biographies

Thi Kim Chi Nguyen

Advanced Institute for Science and Technology, Hanoi University of Science and Technology, 1 Dai Co Viet Street, Bach Khoa Ward, Hai Ba Trung District, Hanoi, Vietnam

College of Natural Sciences, Can Tho University, Area II, 3/2 Street, Xuan Khanh Ward, Ninh Kieu District, Can Tho City, Vietnam

Duy Hung Nguyen

Advanced Institute for Science and Technology, Hanoi University of Science and Technology, 1 Dai Co Viet Street, Bach Khoa Ward, Hai Ba Trung District, Hanoi, Vietnam

Tan Vinh Le, College of Natural Sciences, Can Tho University

College of Natural Sciences, Can Tho University, Area II, 3/2 Street, Xuan Khanh Ward, Ninh Kieu District, Can Tho City, Vietnam

Thanh Vu Tran

College of Natural Sciences, Can Tho University, Area II, 3/2 Street, Xuan Khanh Ward, Ninh Kieu District, Can Tho City, Vietnam

Chi Nguyen Vo

College of Natural Sciences, Can Tho University, Area II, 3/2 Street, Xuan Khanh Ward, Ninh Kieu District, Can Tho City, Vietnam

Thi Kim Trung Pham

College of Natural Sciences, Can Tho University, Area II, 3/2 Street, Xuan Khanh Ward, Ninh Kieu District, Can Tho City, Vietnam

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Published

2021-09-15

Received 6 January 2020; revised 6 March 2020; accepted 3 April 2020

How to Cite

Thi Kim Chi Nguyen, Duy Hung Nguyen, Tan Vinh Le, Thanh Vu Tran, Chi Nguyen Vo, & Thi Kim Trung Pham. (2021). Luminescence properties of Mn4+-doped CaAl2OVietnam Journal of Science, Technology and Engineering, 63(3), 3-7. https://doi.org/10.31276/VJSTE.63(3).03-07

Issue

Section

Physical Sciences