Flame synthesized Y2O3:Tb3+–Yb3+ phosphors as spectral convertors for solar cells

Sovann Khan, Bo In Park, Joon Soo Han, Seung Yong Lee, So Hye Cho

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Near-infrared (NIR) quantum cutting phosphors serve as a potential material for fabricating photovoltaic spectral convertors. In many cases, quantum cutting phosphors are obtained via a wet chemical method coupled with a post-annealing treatment—a very costly process. In this report, we used continuous flame spray pyrolysis (FSP) for fabricating Y2O3:Tb3+–Yb3+ quantum-cutting phosphors without any post-treatment. Based on characterizations by scanning electron microscopy, transmission electron microscopy, and X-ray diffraction, we found that as-synthesized Y2O3:Tb3+–Yb3+ phosphors exhibit hollow and shell-like micro-structures composed of highly crystalline and pure cubic-phase nanoparticles (< 50 nm). Photoluminescence studies of the phosphors revealed that NIR emissions appeared with the introduction of Yb to Y2O3:Tb3+. Phosphor size was successfully controlled by managing the concentration of the metal precursor solution for FSP. The Y2O3:Tb3+–Yb3+ phosphors were then embedded into transparent poly-ethylene-co-vinyl acetate (EVA) film to form a spectral convertor. The composite films of Y2O3:Tb3+–Yb3+ phosphors and poly-EVA were found to be highly transparent in the visible range (> 500 nm), making them suitable as spectral photovoltaic convertors.

Original languageEnglish
Pages (from-to)4619-4632
Number of pages14
JournalResearch on Chemical Intermediates
Issue number8
Publication statusPublished - Aug 1 2018
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry


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