Marzouk M A, Elbatal F H, Elbatal H A, Elkashef I M
Glass Research Department, National Research Centre, 33 El Bohouth Street (former EL Tahrir), Dokki, P.O. 12622, Giza, Egypt.
Physics Department, Faculty of Science, Arish University, Arish, Egypt.
Sci Rep. 2024 Mar 1;14(1):5101. doi: 10.1038/s41598-024-55409-7.
The luminescent spectra of the REO-doped PO-CdO-ZnO glasses (RE = Er, and Tb) were investigated to separate the effects of two studied rare-earth elements and the annealing regime on the emission performance of the prepared glasses. The glasses undergo a series of collective measurements including UV-visible absorption, luminescence, thermal expansion, XRD, TEM, and FTIR. The optical UV-visible spectra of the two doped glasses reveal a UV band due to undoped glass beside and extra extended 11 peaks with the Er ions with high distinct features while the Tb ions samples exhibit peaks within the visible region. These peaks are correlated with transitions from the ground state in each case to specific energy transitions. The overall optical data indicate that the two rare earth ions are present in a stable trivalent state. Under UV excitation, both Er and Tb emit a characteristic green light corresponding to S → I and D → F transitions, respectively. The performance of the green light was identified to be enhanced by increasing the concentration of rare earth and the effect of annealing temperature. Moreover, the intensity of the infrared emission of Er at 1532 nm corresponds to the (I → I) transition which is assumed to be developed with the effect of heating. The resultant IR spectra show distinct vibrational peaks due to phosphate groups that undergo only minor modifications when doped with rare earth elements or over-annealed.
研究了掺稀土氧化物（RE = Er和Tb）的PO-CdO-ZnO玻璃的发光光谱，以区分两种研究的稀土元素和退火制度对所制备玻璃发光性能的影响。这些玻璃进行了一系列综合测量，包括紫外可见吸收、发光、热膨胀、XRD、TEM和FTIR。两种掺杂玻璃的光学紫外可见光谱显示，除了未掺杂玻璃的紫外带外，掺Er离子的玻璃还有额外扩展的11个具有高度明显特征的峰，而掺Tb离子的样品在可见光区域有峰。这些峰与每种情况下从基态到特定能量跃迁的跃迁相关。总体光学数据表明，两种稀土离子均以稳定的三价态存在。在紫外激发下，Er和Tb分别发射对应于S→I和D→F跃迁的特征绿光。确定通过增加稀土浓度和退火温度的影响来增强绿光的性能。此外，Er在1532 nm处的红外发射强度对应于（I→I）跃迁，该跃迁被认为是随着加热效应而产生的。所得红外光谱显示出由于磷酸基团引起的明显振动峰，当掺杂稀土元素或过度退火时，这些峰仅发生微小变化。
