Strong red upconversion luminescence of Yb3+/Er3+ co-doped Bi2O3 phosphors for optical thermometry

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-03-01 DOI:10.1016/j.ceramint.2024.12.329

Xiangyue Liu , Bing Li , Bin Duan , Shiying Guo , Shengli Zhang , Nan Meng , Zhaoyang Lou , Tong Liu , Junshan Hu , Hong Ge

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Abstract

Bi₂O₃ phosphors co-doped with Yb³⁺ and Er³⁺ ions were successfully synthesized using a high-temperature solid-state method. Under 980 nm near-infrared laser excitation, Bi₂O₃: Yb³⁺/Er³⁺ phosphors emit strong red light at 658 nm and weak green light at 551 nm. The optimal doping concentrations of Yb³⁺ and Er³⁺ are 0.10 and 0.02, respectively. This composition results in a red-to-green intensity ratio of 157.6. The red emission is primarily driven by energy transfer, promoting Er³⁺ from the ⁴I_13/2 level to the ⁴F_9/2 level [Yb³⁺ (²F_5/2) + Er³⁺ (⁴I_13/2) → Yb³⁺ (²F_7/2) + Er³⁺ (⁴F_9/2)]. The cross-relaxation process lowers the photon population in the ⁴F_7/2 level and raises the photon population in the ⁴F_9/2 level, leading to the occurrence of a single-band red emission. This phosphor also demonstrates promising potential for optical temperature sensing. It exhibits a maximum relative sensitivity of 3.02 % K⁻¹ at 298 K.

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用于光学测温的Yb3+/Er3+共掺Bi2O3荧光粉的强红色上转换发光

采用高温固相法成功合成了Yb3+和Er3+离子共掺杂的Bi2O3荧光粉。在980 nm近红外激光激发下，Bi2O3: Yb3+/Er3+荧光粉在658 nm处发出强红光，在551 nm处发出弱绿光。Yb3+和Er3+的最佳掺杂浓度分别为0.10和0.02。这种成分产生的红绿强度比为157.6。红色发射主要受能量转移驱动，促使Er3+从4I13/2能级向4F9/2能级转移[Yb3+ (2F5/2) + Er3+ (4I13/2)→Yb3+ (2F7/2) + Er3+ (4F9/2)]。交叉弛豫过程降低了4F7/2能级上的光子居数，提高了4F9/2能级上的光子居数，导致单波段红发射的发生。这种荧光粉在光学温度传感方面也显示出很好的潜力。它在298 K时的最大相对灵敏度为3.02% K−1。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.