Liu Hang, Liu Jian, Sun Bo, Zhang Ziyi, Jiao Chongshan, Sun Ding, Zhang LiXin, Zhang Yuhong
School of Electrical and Computer Engineering, Jilin Jianzhu University, Changchun 130118, China.
School of Physics, Nankai University, Tianjin 300071, China.
Inorg Chem. 2024 Mar 25;63(12):5365-5377. doi: 10.1021/acs.inorgchem.3c03939. Epub 2024 Mar 11.
Herein, Bi/Mn doped CaLaTaO phosphors with a double-perovskite structure were successfully synthesized with solid-state reaction at high temperature. The photoluminescence (PL) performances were investigated in detail. The blue radiation (∼465 nm) from the Bi ion and the red radiation (∼686 nm) originating from the Mn ion were obtained under 313 nm excitation. Especially, the pathway of energy transfer (Bi → Mn) contributes to enhance the red emission intensity (Mn: ∼686 nm) in CaLaTaO:Bi/Mn system. The PL mechanism of CaLaTaO:Bi/Mn was analyzed through luminescence lifetimes and PL spectra. Moreover, the emitting bands of CaLaTaO:Bi/Mn were primarily matched with the absorbing bands of carotenoids and phytochrome P on behalf of plant growth, so the phosphors were suitable for the design of a plant growth light under near-ultraviolet to blue excitation. At last, the optical temperature dependent performances of the CaLaTaO:Bi/Mn were analyzed with luminescence intensity ratio technology. The sample has presented excellent temperature measuring relative sensitivity ( = 2.106% K). The results illustrated that the CaLaTaO:Bi/Mn phosphor also can be used to develop an optical temperature sensor.
在此，采用高温固相反应成功合成了具有双钙钛矿结构的Bi/Mn掺杂CaLaTaO荧光粉。详细研究了其光致发光（PL）性能。在313nm激发下，获得了Bi离子发出的蓝光（465nm）和Mn离子发出的红光（686nm）。特别是，能量转移途径（Bi→Mn）有助于提高CaLaTaO:Bi/Mn体系中红光发射强度（Mn:~686nm）。通过发光寿命和PL光谱分析了CaLaTaO:Bi/Mn的PL机制。此外，CaLaTaO:Bi/Mn的发射带与代表植物生长的类胡萝卜素和光敏色素P的吸收带基本匹配，因此该荧光粉适用于近紫外到蓝光激发下的植物生长灯设计。最后，利用发光强度比技术分析了CaLaTaO:Bi/Mn的光学温度依赖性能。该样品具有优异的测温相对灵敏度（=2.106%K）。结果表明，CaLaTaO:Bi/Mn荧光粉也可用于开发光学温度传感器。
