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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 21 — Oct. 11, 2010
  • pp: 21663–21668

Intense infrared emission of Er3+ in Ca8Mg(SiO4)4Cl2 phosphor from energy transfer of Eu2+ by broadband down-conversion

Jiajia Zhou, Yu Teng, Xiaofeng Liu, Song Ye, Xiaoqiu Xu, Zhijun Ma, and Jianrong Qiu  »View Author Affiliations

Optics Express, Vol. 18, Issue 21, pp. 21663-21668 (2010)

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We report on conversion of near-ultraviolet and visible radiation ranging from 250 to 500nm into near-infrared emission by a Ca8Mg(SiO4)4Cl2: Eu2+, Er3+ phosphor. Efficient 1530-1560nm Er3+ emission (4I13/2→4I15/2) was detected under the excitation of Eu2+ (4f→5d) absorption band as a result of energy transfer from Eu2+ to Er3+, which is confirmed by both steady state and time-resolved emission spectra. The laser power dependent emission intensity changes were investigated to analysis the energy transfer mechanism. Energy transfer from Eu2+ to Er3+ followed by a multi-photon quantum cutting of Er3+ is proposed. The result indicates that the phosphor has potential application in enhancement of conversion efficient of germanium solar cells because the energy difference of Er3+: 4I13/2→4I15/2 transition matches well with the bandgap of Ge (Eg~0.785 eV).

© 2010 OSA

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(300.6340) Spectroscopy : Spectroscopy, infrared

ToC Category:

Original Manuscript: August 20, 2010
Revised Manuscript: September 22, 2010
Manuscript Accepted: September 25, 2010
Published: September 29, 2010

Jiajia Zhou, Yu Teng, Xiaofeng Liu, Song Ye, Xiaoqiu Xu, Zhijun Ma, and Jianrong Qiu, "Intense infrared emission of Er3+ in Ca8Mg(SiO4)4Cl2 phosphor from energy transfer of Eu2+ by broadband down-conversion," Opt. Express 18, 21663-21668 (2010)

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