掺铒锆钛酸铅镧陶瓷的上转换动力学分析

测量了掺铒锆钛酸铅镧(Er³⁺:PLZT)陶瓷的吸收光谱和上转换荧光光谱，利用Er³⁺:PLZT的吸收光谱，计算Er³⁺离子的辐射跃迁概率. 分析了980nm 激发下 Er³⁺:PLZT 的上转换荧光光谱，观察到明显的上转换荧光，且峰值位于540，564nm附近的绿色荧光带比 678nm 附近的红色荧光带强. 建立了Er³⁺离子跃迁的速率方程，通过求解速率方程并采用拟合荧光衰减实验曲线的方法，得出 关键词： 频率上转换 3+离子')" href="#">Er³⁺离子 锆钛酸铅镧陶瓷 速率方程

Analysis of the dynamics of upconversion in erbium-doped transparent lead lanthanum zirconate titanate ceramic

The absorption and upconversion fluorescence spectra of Er³⁺ ions in Er³⁺ doped transparent lead lanthanum zirconate titanate(PLZT)ceramic were measured at room temperature. The radiative transition probabilities of the Er³⁺ ions were calculated using the absorption spectrum of Er³⁺ doped PLZT. Strong upconversion emission was observed in the upconversion luminescence of Er³⁺ doped PLZT. The green emission intensities at 540nm and 564nm were stronger than the red emission intensity at 678nm. The upconversion rate equations describing the dynamic process of the system have been deduced. The upconversion coefficients were estimated by numerically solving the rate equations and fitting the simulated curves to the measured data. The coefficients C₂₂and C₃₃ obtained are 091×10^-18cm^{3/s and 1823×10-18cm3/s, respectively. The results show that evident upconvesion phenomenon can be observed in Er3+: PLZT transparent ceramics, which is consistent with our observation.}