Abstract Recently, we proposed a concept for a new class of near infrared (NIR) scintillators by employing efficient Eu2+ → Sm2+ energy transfer. In this article we investigate the optical spectroscopy of Sm2+ in BaBrI, CsSrI3, and CsBa2I5 halide hosts. A criterion was derived for fast Sm2+ 5d → 4f emission and a list of new potential NIR scintillators is proposed.

中文翻译：

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设计具有高效 Eu2+ → Sm2+ 能量转移的近红外发射闪烁体

摘要 最近，我们通过采用高效的 Eu2+ → Sm2+ 能量转移，提出了一种新型近红外 (NIR) 闪烁体的概念。在本文中，我们研究了 BaBrI、CsSrI3 和 CsBa2I5 卤化物主体中 Sm2+ 的光谱。推导出了快速 Sm2+ 5d → 4f 发射的标准，并提出了新的潜在 NIR 闪烁体列表。