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Y2Si3O3N4:Ce3+: a promising phosphor for WLEDs in general lighting applications

H. M. TRUNG1, N. T. D. AN2, N. L. THAI3,* , H. Y. LEE4

Affiliation

  1. Faculty of Basic Sciences, Vinh Long University of Technology Education, Vinh Long Province, Vietnam
  2. Faculty of Electrical Engineering Technology, Industrial University of Ho Chi Minh City, Ho Chi Minh City, Vietnam
  3. Faculty of Engineering and Technology, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
  4. Department of Electrical Engineering, National Kaohsiung University of Sciences and Technology, Kaohsiung, Taiwan

Abstract

The blue-green emitting phosphor Y2Si3O3N4:Ce3+ , with strong absorption well matching with the near-UV excitation of the LED, is produced using solid-state synthesis. The characterization analysis of the prepared phosphor shows that Y2Si3O3N4:Ce3+ with 0.06 doping concentration of Ce3+ ion presents significant absorption centered at 397 nm and broad emission range from blue to green under the near-UV excitation. The large emission wavelength band (456 nm – 500 nm) of Ce3+ -doped Y2Si3O3N4 could be owing to the transition from 5d to 4f energy levels of Ce3+ ions. The phosphor is incorporated as the second phosphor material, with yellow-emitting phosphor YAG:Ce3+, to fabricate a single white lightemitting diode (W-LED) structure. The impacts of doping Y2Si3O3N4:Ce3+ on the lighting efficiency of the W-LED are investigated. The luminous intensity and color temperature consistency are generally benefitted from the increase of Y2Si3O3N4:Ce3+ doping concentration. Conversely, the color rendering indices tend to favor the lower concentration of Y2Si3O3N4:Ce3+. The blue-green emitting phosphor Y2Si3O3N4:Ce3+ , therefore, can be promising for high-flux lighting applications that require relatively good chromatic rendition.

Keywords

White LED, Lambert-Beer law, Color rendering index, Luminous efficacy.

Citation

H. M. TRUNG, N. T. D. AN, N. L. THAI, H. Y. LEE, Y2Si3O3N4:Ce3+: a promising phosphor for WLEDs in general lighting applications, Optoelectronics and Advanced Materials - Rapid Communications, 17, 9-10, September-October 2023, pp.467-473 (2023).

Submitted at: May 16, 2022

Accepted at: Oct. 9, 2023