Beijing Centre for Crystal Research and Development, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Chemistry. 2018 Jun 4;24(31):7856-7860. doi: 10.1002/chem.201801742. Epub 2018 May 9.
For the explorations of deep ultraviolet (DUV) nonlinear optical (NLO) borates, a type of important optoelectronic material, the (BO ) group has been long regarded as the sole microscopic optically-active unit, and toxic Be-containing raw materials are frequently-adopted. Herein, a new DUV NLO crystal, Cs Al (B O ) O (CABO), was designed and synthesized by simultaneously replacing the (BO ) groups and Be cations for (B O ) units and Al cations in Sr Be (BO ) O, which possesses a favorable structure, through a chemical co-substitution approach. CABO exhibits a considerable DUV NLO capability because of the wide band gap and large birefringence originating from the [Al (B O ) O] double layers. Remarkably, CABO melts congruently and does not contain the toxic beryllium, which is favorable for bulk-size crystal growth and practical applications.
对于深紫外（DUV）非线性光学（NLO）硼酸盐的探索，作为一种重要的光电材料，（BO ）基团长期以来一直被认为是唯一的微观光学活性单元，并且经常采用含毒的含 Be 原料。在此，通过化学共取代方法，在 SrBe（BO ）O 中同时取代（BO ）基团和 Be 阳离子，设计并合成了一种新的 DUV NLO 晶体 CsAl（BO ）O（CABO）。由于 [Al（BO ）O] 双层结构带来的宽能带隙和大双折射，CABO 具有相当大的 DUV NLO 性能。值得注意的是，CABO 具有一致熔融的特性，且不含有毒的铍，这有利于块状晶体的生长和实际应用。
