Scholars@Duke

Temperature-Dependent Electroluminescence of Phosphor-Converted White LEDs With K2SiF6:Mn4+Below Room Temperature

Publication ,  Journal Article
Zhang, D; Zheng, Y; Lu, K; Wang, Z; Tang, F; Ning, J; Xu, S; Zheng, C
Published in: IEEE Electron Device Letters
April 1, 2022
Published version (DOI)

High-efficiency Mn4+-activated red phosphor of K2SiF6:Mn4+ synthesized at low temperature was utilized to fabricate phosphor-converted white light-emitting diodes (pc-WLEDs). Temperature-dependent electroluminescence (EL) measurements were undertaken at a constant forward voltage mode. A large negative-thermal-quenching (NTQ) effect is demonstrated for the luminescence intensity of this kind of red phosphor in the temperature range of 100-300 K. It is found that its enhancement rate is several times higher than those of the blue chip and the green component, such that the overall color of the pc-WLED shows a wide color gamut in the studied temperature range. By utilizing this outstanding NTQ property of the red phosphor, a color rendering index up to R a=93 is obtained for the high-brightness pc-WLED with relatively low blue light from the LED chip.

Duke Scholars

Changcheng Zheng
Author Changcheng Zheng DKU Faculty

Published In

IEEE Electron Device Letters

DOI

10.1109/LED.2022.3151117

EISSN

1558-0563

ISSN

0741-3106

Publication Date

April 1, 2022

Volume

43

Issue

4

Start / End Page

600 / 603

Related Subject Headings

  • Applied Physics
  • 4009 Electronics, sensors and digital hardware
  • 0906 Electrical and Electronic Engineering
 

Citation

APA
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Zhang, D., Zheng, Y., Lu, K., Wang, Z., Tang, F., Ning, J., … Zheng, C. (2022). Temperature-Dependent Electroluminescence of Phosphor-Converted White LEDs With K2SiF6:Mn4+Below Room Temperature. IEEE Electron Device Letters, 43(4), 600–603. https://doi.org/10.1109/LED.2022.3151117
Zhang, D., Y. Zheng, K. Lu, Z. Wang, F. Tang, J. Ning, S. Xu, and C. Zheng. “Temperature-Dependent Electroluminescence of Phosphor-Converted White LEDs With K2SiF6:Mn4+Below Room Temperature.” IEEE Electron Device Letters 43, no. 4 (April 1, 2022): 600–603. https://doi.org/10.1109/LED.2022.3151117.
Zhang D, Zheng Y, Lu K, Wang Z, Tang F, Ning J, et al. Temperature-Dependent Electroluminescence of Phosphor-Converted White LEDs With K2SiF6:Mn4+Below Room Temperature. IEEE Electron Device Letters. 2022 Apr 1;43(4):600–3.
Zhang, D., et al. “Temperature-Dependent Electroluminescence of Phosphor-Converted White LEDs With K2SiF6:Mn4+Below Room Temperature.” IEEE Electron Device Letters, vol. 43, no. 4, Apr. 2022, pp. 600–03. Scopus, doi:10.1109/LED.2022.3151117.
Zhang D, Zheng Y, Lu K, Wang Z, Tang F, Ning J, Xu S, Zheng C. Temperature-Dependent Electroluminescence of Phosphor-Converted White LEDs With K2SiF6:Mn4+Below Room Temperature. IEEE Electron Device Letters. 2022 Apr 1;43(4):600–603.

Published In

IEEE Electron Device Letters

DOI

10.1109/LED.2022.3151117

EISSN

1558-0563

ISSN

0741-3106

Publication Date

April 1, 2022

Volume

43

Issue

4

Start / End Page

600 / 603

Related Subject Headings

  • Applied Physics
  • 4009 Electronics, sensors and digital hardware
  • 0906 Electrical and Electronic Engineering