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Energy transfer in Tb3+- Yb3+ doubly doped CsGd(MoO4)2 single crystals for contactless thermometry, solid-state lighting and solar cells
Materials Technology ( IF 3.1 ) Pub Date : 2021-04-18 , DOI: 10.1080/10667857.2021.1915055
Alexey Ryadun 1 , Mariana I. Rakhmanova 1 , Vyacheslav A. Trifonov 1 , Anatoly A. Pavluk 1
Affiliation  

ABSTRACT

A novel terbium (Tb3+) and ytterbium (Yb3+) co-doped optical quality CsGd(MoO4)2 single crystals were grown by the low-thermal-gradient Czochralski method. Photoluminescence spectra were measured and studied for Tb3+– Yb3+ doubly doped CsGd(MoO4)2 crystals at 77–340 K temperature range. Under 330 nm excitation the main peaks of Tb3+ and Yb3+ emission were observed. Decay curves were obtained for the energy levels 5D4 of Tb3+ and 2F7/2 of Yb3+ in CsGd(MoO4)2 crystals. Decay time for Tb3+ transitions significantly varies at temperatures close to ambient. Such behaviour allows to assume perspective application of this effect for non-contact luminescence lifetime thermometry. The emission colour chromaticity coordinates of CsGd(MoO4)2: Tb3+ -Yb3+ crystals are close to SMPTE (Society of Motion Picture and Television Engineers) standard for green colour, as shown on CIE 1931 diagram. Correlated colour temperature varies from 5538 K at 77 K to 4297 K at 340 K.



中文翻译:

用于非接触式测温、固态照明和太阳能电池的 Tb3+-Yb3+ 双掺杂 CsGd(MoO4)2 单晶中的能量转移

摘要

采用低热梯度直拉法生长出一种新型铽(Tb 3+)和镱(Yb 3+)共掺杂光学质量CsGd(MoO 4 ) 2单晶。在 77–340 K 温度范围内测量和研究了 Tb 3+ – Yb 3+双掺杂 CsGd(MoO 4 ) 2晶体的光致发光光谱。在 330 nm 激发下,观察到Tb 3+和 Yb 3+发射的主峰。获得Tb 3+的能级5 D 4和Yb 的2 F 7/2能级的衰减曲线CsGd(MoO 4 ) 2晶体中的3+ 。Tb 3+跃迁的衰减时间在接近环境温度时显着变化。这种行为允许假设这种效应在非接触式发光寿命测温中的应用前景。CsGd(MoO 4 ) 2: Tb 3+ -Yb 3+晶体的发射色度坐标接近绿色的 SMPTE(电影和电视工程师协会)标准,如 CIE 1931 图表所示。相关色温从 77 K 的 5538 K 变化到 340 K 的 4297 K。

更新日期:2021-04-18
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