期刊
OPTICS EXPRESS
卷 20, 期 19, 页码 A722-A728出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.20.00A722
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资金
- National Natural Science Foundations of China [51002146, 51272242]
- Ph.D. Programs Foundation of Ministry of Education of China [20090022120002]
- Fundamental Research Funds for the Central Universities [2010ZY35, 2011YYL131]
LaOBr:Nd3+/Yb3+ has been prepared via a high temperature solid-state method, and near-infrared (NIR) quantum cutting (QC) luminescence in this system has been demonstrated. NIR luminescence of LaOBr: Nd3+/Yb3+ has been investigated by excitation, emission spectra and lifetime measurements, respectively. After absorption of a single 363 nm photon, downconversion (DC) occurs from the Nd3+ (4)G(9/2) level via the cross-relaxation process Nd3+ ((4)G(9/2)-> F-4(3/2)), Yb3+ (F-2(7/2)-> F-2(5/2)), followed by a second energy transfer step from Nd3+ (F-4(3/2) level) to Yb3+ (F-2(5/2) level), leading to the emission of two IR photons from Yb3+, which is a promising avenue to boost the efficiency of solar cells with a twofold increase in the photon number. (C) 2012 Optical Society of America
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