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Near-infrared DC approach by Bi3+–Yb3+ co-doped YAG phosphor

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Abstract

Bi3+–Yb3+ ion pair co-doped YAG phosphors were successfully synthesized using conventional solid state reaction method varying the concentration of Yb3+ ions from 0.5 to 10 mol%. The optimum phosphors were characterized by powder X-ray diffraction (XRD), and surface morphology was studied with a scanning electronic microscope (SEM). The photoluminescence (PL) properties were studied with a spectrophotometers in near infrared (NIR) and ultraviolet visible (UV-Vis) regions. The synthesized phosphors can convert a photon of UV region (330 nm) into photons of NIR region (979 and 992 nm). The co-operative energy transfer (CET) was studied using a time decay curve and PL spectra. The theoretical value of quantum efficiency (QE) was calculated from steady time decay measurement, and the maximum efficiency approached up to 166.91 %. Hence, this phosphor could be used as a downconversion (DC) luminescent convertor in front of crystalline silicon solar cell (c-Si) panels to reduce heat loss due to spectral mismatch of the solar cells.

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Acknowledgments

One of the authors, Niraj S. Sawala, is thankful to the Chairman FIST-DST Project, SGBA University, Amravati (MH), PIN-444602 INDIA for providing the XRD facility for this work. The author is thankful to Dr. M. Krishnan (Head GCTL) and Dr. P. Nandi (GCTL) BARC, Mumbai (MH) INDIA for providing the FLS980 spectrophotometer facility to study PL in the NIR range. The author also thanks Dr. Prakash R. Somani, Applied Science Innovations Pvt. Ltd., Pune, Maharashtra, India for providing access to the SEM facility.

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  1. Department of Physics, Sant Gadge Baba Amravati University, Amravati, MH, 444602, India

    N. S. Sawala & S. K. Omanwar

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  1. N. S. Sawala
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  2. S. K. Omanwar
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Correspondence to N. S. Sawala.

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Sawala, N.S., Omanwar, S.K. Near-infrared DC approach by Bi3+–Yb3+ co-doped YAG phosphor. Res Chem Intermed 43, 693–702 (2017). https://doi.org/10.1007/s11164-016-2646-0

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