Electronic Spectra and Crystal Field Analysis of Er3+ in Cs2NaErF6

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• 作者：Xianju Zhou ; Peter A. Tanner ; Michè ; le D. Faucher
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：January 18, 2007
• 年：2007
• 卷：111
• 期：2
• 页码：683 - 687
• 全文大小：87K
• 年卷期：v.111,no.2(January 18, 2007)
• ISSN：1932-7455

文摘

The optical electronic spectra of Cs₂NaErF₆, Cs₂NaY_0.9Er_0.1F₆, and Cs₂NaM_0.5Er_0.5F₆ (M = Sc, Ga) havebeen investigated at temperatures down to 10 K. The absorption spectra span the range from 6000 to 41 000cm^-1, whereas emission has been observed from the ⁴S_3/2, ⁴F_9/2, ⁴I_9/2, and ⁴I_11/2 multiplet terms in the spectralrange from 25 000 to 9000 cm^-1. Each transition between crystal field levels comprises extensive, well-resolved vibronic structure. From the detailed vibronic analyses, 39 crystal field levels have been assignedfrom 0 to 27 642 cm^-1. A configuration interaction assisted crystal field (CIACF) calculation provides agood energy level fit with reasonable energy parameters. The mean deviation of the standard 4f¹¹2p⁶ fit to theenergy levels (23 cm^-1) exceeded that for the 4f¹¹2p⁶/4f¹²2p⁵ CIACF fitting (6.4 cm^-1), which provides 4f¹¹2p⁶/4f¹²2p⁵ further evidence for the importance of the charge-transfer configuration interaction.