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Growth Regulation of Pentacene-Doped p-Terphenyl Crystals on Their Physical Properties for Promising Maser Gain Medium
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2020-01-15 , DOI: 10.1021/acs.cgd.9b01190 Shuangyue Cui 1 , Yang Liu 1 , Guilan Li 2 , Quanxiang Han 1 , Chao Ge 1 , Leilei Zhang 1 , Qing Guo 1 , Xin Ye 1 , Xutang Tao 1
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2020-01-15 , DOI: 10.1021/acs.cgd.9b01190 Shuangyue Cui 1 , Yang Liu 1 , Guilan Li 2 , Quanxiang Han 1 , Chao Ge 1 , Leilei Zhang 1 , Qing Guo 1 , Xin Ye 1 , Xutang Tao 1
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Doped organic crystals possess wide application potential in the fields of scintillators and maser gain medium. However, the growth of doped organic single crystals with bulk size and high quality is still a big challenge due to the well-known poor crystallization capacity for organic materials. Here we report a thermal field-elevating technique to realize optimized growth conditions for organic crystals, where a pentacene-doped p-terphenyl single crystal with a size of Φ18 mm × 80 mm is obtained. Crystal quality and doping concentration effect on the optical properties of the crystalline wafers are investigated. The results show that p-terphenyl single crystal as an ordered matrix not only separates the guest molecules from one another to prevent quenching, but also constructs a Shpolskii-type host as an orienting medium to increase the interaction of pentacene with light. Moreover, a slightly reducing growth atmosphere is found to generate longer excitation lifetimes and a larger magnetic susceptibility of the grown doped crystal, which may be favorable for the spin-related physical process occurring in the excited state.
中文翻译：
并五苯掺杂对三联苯晶体的物理性质对有希望的Maser增益介质的生长规律
掺杂有机晶体在闪烁体和微波激射介质领域具有广阔的应用前景。然而，由于众所周知的有机材料的结晶能力差，因此具有大体积和高质量的掺杂有机单晶的生长仍然是一个巨大的挑战。在这里，我们报告了一种热场增强技术，以实现有机晶体的最佳生长条件，从而获得了并五苯掺杂的对叔丁基单晶，其直径为Φ18mm×80 mm。研究了晶体质量和掺杂浓度对晶体晶片光学性能的影响。结果表明：p-叔苯基单晶作为有序基质，不仅使客体分子彼此分离以防止猝灭，而且构建了Shpolskii型主体作为定向介质，以增加并五苯与光的相互作用。此外，发现稍微降低的生长气氛会产生更长的激发寿命和生长的掺杂晶体的较大磁化率，这对于在激发态下发生的与自旋有关的物理过程可能是有利的。
更新日期：2020-01-16
中文翻译：
并五苯掺杂对三联苯晶体的物理性质对有希望的Maser增益介质的生长规律
掺杂有机晶体在闪烁体和微波激射介质领域具有广阔的应用前景。然而，由于众所周知的有机材料的结晶能力差，因此具有大体积和高质量的掺杂有机单晶的生长仍然是一个巨大的挑战。在这里，我们报告了一种热场增强技术，以实现有机晶体的最佳生长条件，从而获得了并五苯掺杂的对叔丁基单晶，其直径为Φ18mm×80 mm。研究了晶体质量和掺杂浓度对晶体晶片光学性能的影响。结果表明：p-叔苯基单晶作为有序基质，不仅使客体分子彼此分离以防止猝灭，而且构建了Shpolskii型主体作为定向介质，以增加并五苯与光的相互作用。此外，发现稍微降低的生长气氛会产生更长的激发寿命和生长的掺杂晶体的较大磁化率，这对于在激发态下发生的与自旋有关的物理过程可能是有利的。
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