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Issue 38, 2009
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UV photon harvesting and enhanced near-infrared emission in novel quantum cutting Ca2BO3Cl:Ce3+,Tb3+,Yb3+ phosphor

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Abstract

A novel near-infrared (NIR) quantum cutting (QC) Ca2BO3Cl:Ce3+,Tb3+,Yb3+ phosphor promising for luminescent solar concentrators (LSC) with Si solar cells was successfully developed. It can harvest UV photons and exhibits an intense NIR emission of Yb3+ around ∼1000 nm, perfectly matching the maximum spectral response of Si solar cells. The NIR emission intensity of Ca2BO3Cl:Ce3+,Tb3+,Yb3+ upon broadband excitation of Ce3+ ion at 288, 315 and 369 nm is about 9.1, 10 and 2.8 times as intense as that of GdBO3:Tb3+,Yb3+ with the highest NIR quantum efficiency of about 182% upon narrow excitation of Tb3+ ion at 488 nm. It demonstrates for the first time that Ce3+ ion can be an efficient sensitizer harvesting UV photons and greatly enhancing the NIR emission of Yb3+ ion through efficient energy feeding by the allowed 4f–5d absorption of Ce3+ ion with high oscillator strength. We believe this new NIR QC phosphor may open a new route to the design of advanced NIR QC phosphors for maximizing LSC performance with Si solar cells.

Graphical abstract: UV photon harvesting and enhanced near-infrared emission in novel quantum cutting Ca2BO3Cl:Ce3+,Tb3+,Yb3+ phosphor

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Publication details

The article was received on 08 Apr 2009, accepted on 10 Jul 2009 and first published on 06 Aug 2009


Article type: Paper
DOI: 10.1039/B906954B
Citation: J. Mater. Chem., 2009,19, 7088-7092
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    UV photon harvesting and enhanced near-infrared emission in novel quantum cutting Ca2BO3Cl:Ce3+,Tb3+,Yb3+ phosphor

    Q. Zhang, J. Wang, G. Zhang and Q. Su, J. Mater. Chem., 2009, 19, 7088
    DOI: 10.1039/B906954B

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