Abstract We proposed the FIR method-based optical materials involving dual luminescent centers of Bi3+ and lanthanide (Ln): Eu3+/Sm3+. Resulted from the f-f characteristic transition of Eu3+, the tunable color region changing from cyan to jacinth with the augment of Eu3+/Bi3+ ratio exists . Owing to Bi3+ being susceptive to crystal surroundings, and asymmetric crystal sites of Sm3+ in the host, phenomena respectively involving redshift and energy level splitting occur. In addition, benefiting from the unshielded 3d orbitals, the thermal quenching of Bi3+ ion occurs through energy-level crossing relaxation (ELCR), while the heating quenching of Ln3+ ions takes place due to the shielded 4f orbitals via multi-phonon deexcitation (MPD). Considering the symmetric crystal environment, stronger sensitivity compared with Sm3+ ion to the outer environment due to its smaller value of thermal activation energy and the weaker crystal field than CAZO:Bi3+,Sm3+, a more excellent temperature sensing sensitivity is excepted by applying Eu3+ as the temperature-detecting signal.

中文翻译：

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锌酸盐荧光粉共掺杂铋 Bi3+ 和镧系元素 Eu3+/Sm3+ 的发光和温度传感能力

摘要 我们提出了基于 FIR 方法的光学材料，涉及 Bi3+ 和镧系元素 (Ln) 的双发光中心：Eu3+/Sm3+。由于Eu3+的ff特征跃迁，随着Eu3+/Bi3+比值的增加，存在从青色变为紫红色的可调颜色区域。由于Bi3+易受晶体环境的影响，以及Sm3+在主体中的不对称晶位，分别出现红移和能级分裂现象。此外，受益于未屏蔽的 3d 轨道，Bi3+ 离子的热猝灭通过能级交叉弛豫 (ELCR) 发生，而 Ln3+ 离子的加热猝灭则由于多声子去激 (MPD) 的屏蔽 4f 轨道而发生. 考虑到对称晶体环境，