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Reversible upconversion switching for Ho/Yb codoped (K,Na)NbO3 ceramics with excellent luminescence readout capability
Journal of the American Ceramic Society ( IF 3.5 ) Pub Date : 2018-06-29 , DOI: 10.1111/jace.15885
Haiqin Sun 1 , Yao Zhang 1 , Jian Liu 1 , Dengfeng Peng 2 , Qiwei Zhang 1 , Xihong Hao 1
Affiliation  

Luminescent readout capability for photochromic materials plays a critical role in 3D optical data storage applications, especially for inorganic photochromic materials in the solid‐state form. In our previous studies, we found that the luminescent readout capability can be improved using two or multiple‐photon excited luminescent mode (upconversion), which can effectively decrease the destruction degree of the excitation energies to the stored information during the luminescent “reading” process. However, the luminescent readout performance is unsatisfactory owing to the absence of nondestructive luminescence readout capability. Herein, we report a new solid‐state photochromic material with excellent upconversion readout capability: Ho3+/Yb3+ codoped (K,Na)NbO3. Upon 407 nm light irradiation, the luminescent switching contrast (ΔRt) is up to 78%. Particularly, the materials almost have no any re‐absorption to 980 nm light, exhibiting extremely low destruction to information recording points. The luminescent readout intensity retains 96% after constant 980 nm irradiation for 4 minutes at a high pumping power of 1W, which is superior to our previously reported results (Er/Yb codoped Bi2.5Na0.5Nb2O9 materials). This work would help to further develop new inorganic photochromic materials with high performance to satisfy the requirements for optical storage devices.

中文翻译:

具有出色的发光读出能力的Ho / Yb共掺杂(K,Na)NbO3陶瓷的可逆上转换开关

光致变色材料的发光读出能力在3D光学数据存储应用中起着至关重要的作用,尤其是对于固态固态无机光致变色材料。在我们以前的研究中,我们发现使用两个或多个光子激发的发光模式(上转换)可以提高发光的读出能力,这可以有效地降低在发光“读取”过程中激发能对存储信息的破坏程度。 。然而,由于缺乏无损发光读出能力,因此发光读出性能不能令人满意。在本文中,我们报告了一种新型的固态光致变色材料,具有出色的上转换读出能力:共掺杂(K,Na)NbO 3的Ho 3+ / Yb 3+ 在407 nm的光照射下,发光转换对比度(ΔR t)高达78%。特别是,这些材料几乎对980 nm的光没有任何重新吸收,对信息记录点的破坏极小。在1W的高泵浦功率下连续980 nm照射4分钟后,发光读数强度保持96%,这优于我们先前报道的结果(Er / Yb共掺杂Bi 2.5 Na 0.5 Nb 2 O 9材料)。这项工作将有助于进一步开发具有高性能的新型无机光致变色材料,以满足光学存储设备的需求。
更新日期:2018-06-29
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