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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 16 — Jul. 30, 2012
  • pp: 18031–18043

Appropriate green phosphor of SrSi2O2N2:Eu2+,Mn2+ for AC LEDs

Chiao-Wen Yeh, Ye Li, Jing Wang, and Ru-Shi Liu  »View Author Affiliations

Optics Express, Vol. 20, Issue 16, pp. 18031-18043 (2012)

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An AC (alternating current) LED exhibited the advantages of a low drive current, low static electricity, lack of a need for a rectifier, and high extraction efficiency. The input operating voltage of an AC LED is around 80V, and its operating frequency is 120 Hz or less. When the voltage is converted, a time gap of 1/120 s (10 ms), called dead time, is generated. This time gap is closely related to the scintillation phenomenon. Therefore, AC LEDs that have a phosphor composition, whose half-life composition can compensate for dead time that is generated during the voltage conversion, are sought to solve the problem of scintillation. The object of this work is to provide a phosphor SrSi2O2N2:Eu2+,Mn2+ for AC LEDs, in which the dead time that is generated during the voltage conversion is compensated for by the half-life of the phosphor.

© 2012 OSA

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(250.5230) Optoelectronics : Photoluminescence
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence

ToC Category:
Optical Devices

Original Manuscript: May 1, 2012
Revised Manuscript: July 4, 2012
Manuscript Accepted: July 10, 2012
Published: July 23, 2012

Chiao-Wen Yeh, Ye Li, Jing Wang, and Ru-Shi Liu, "Appropriate green phosphor of SrSi2O2N2:Eu2+,Mn2+ for AC LEDs," Opt. Express 20, 18031-18043 (2012)

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