发光铁电体 Sm3+ 掺杂 LiNbO3 中 Bi3+ 驱动的缺陷形成及相关光学多模性

IF 3.3 3区物理与天体物理 Q2 OPTICS Journal of Luminescence Pub Date : 2024-09-05 DOI:10.1016/j.jlumin.2024.120879

D.J. Lee, Y.S. Lee

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引用次数: 0

摘要

我们研究了一种新型无机光致变色材料--Sm3+和Bi3+掺杂的LiNbO3，它是用传统的高温固态方法合成的。在我们的样品中，Sm3+ 充当橙红色发光中心，而共掺剂 Bi3+ 则在宿主晶格内产生陷阱。掺杂 Bi3+ 可抑制 Sm3+ 的橙红色发射，并显著改善紫外可见光开关光致变色（PC）行为以及与 Bi3+ 缺陷形成相关的光致发光调制。此外，我们的样品还表现出与 PC 行为密切相关的良好的持续发光特性。此外，即使掺杂了 Sm3+/Bi3+，我们的样品仍能保持其铁电特性。这些优异的光学特性表明，Sm3+ 和 Bi3+掺杂的 LiNbO3 是一种很有前途的用于光学信息存储的无机光致变色材料。

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Bi3+-driven defect formation and related optical multimode in luminescent ferroelectrics Sm3+-doped LiNbO3

We investigated a novel inorganic photochromic material, Sm³⁺ and Bi³⁺-codoped LiNbO₃, which was synthesized using a traditional high-temperature solid-state method. In our samples, Sm³⁺ acted as an orange-red luminescence center, whereas the codopant Bi³⁺ created traps within the host lattice. Doping with Bi³⁺ suppressed the orange-red emission of Sm³⁺ and significantly improved the UV–visible photoswitching photochromic (PC) behavior and the related photoluminescence modulation associated with defect formation by Bi³⁺. Moreover, our samples exhibited good persistent luminescence in close relation to the PC behavior. Furthermore, our samples retained their ferroelectric properties even after doping with Sm³⁺/Bi³⁺. These excellent optical properties suggest that Sm³⁺ and Bi³⁺-codoped LiNbO₃ can be promising inorganic photochromic materials for optical information storage.

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.