• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Optical Materials >Negative Thermal Quenching of Efficient White-Light Emission in a 1D Ladder-Like Organic/Inorganic Hybrid Material
【24h】

Negative Thermal Quenching of Efficient White-Light Emission in a 1D Ladder-Like Organic/Inorganic Hybrid Material

机译：一维阶梯状有机/无机杂化材料中高效白光的负热淬火

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The synthesis and the optical properties of a new organic-inorganic hybrid material (C6H22N4)[Pb2Br8] (abbreviated as TETAPb(2)Br(8)) is reported here. Its ladder-like crystal structure is built up from infinite 1D chains of corner-sharing [Pb2Br8](4-) bi-octahedra surrounded by tetra-protonated triethylenetetramine (abbreviated as TETA(4+)) organic cations. Under UV excitation, this hybrid organic-inorganic compound emits white light due to radiative recombinations of self-trapped excitons associated with a structural distortion of the PbBr6 octahedra. Thin films of TETAPb(2)Br(8) show a photoluminescence (PL) quantum yield of approximate to 11% and exhibit a Commission Internationale de l'Eclairage coordinates of (0.32, 0.37). In the low-temperature range, the PL intensity increases with increasing temperature. This negative thermal quenching of white-light emission is interpreted in terms of transitions between excitonic states involving an exciton-phonon interaction. The interpretations are supported by the temperature dependence of the resonant Raman scattering and by density functional theory calculations.
机译：此处报道了一种新型的有机-无机杂化材料（C6H22N4）[Pb2Br8]（缩写为TETAPb（2）Br（8））的合成和光学性质。它的梯形晶体结构是由四角质子化的三亚乙基四胺（缩写为TETA（4+））有机阳离子包围的无限一维角共享[Pb2Br8]（4-）双八面体链构成的。在紫外线激发下，由于与PbBr6八面体的结构变形相关的自陷激子的辐射复合，这种杂化的有机-无机化合物发出白光。 TETAPb（2）Br（8）的薄膜显示大约11％的光致发光（PL）量子产率，并显示国际照明委员会的坐标为（0.32，0.37）。在低温范围内，PL强度随温度升高而增加。根据涉及激子-声子相互作用的激子状态之间的跃迁来解释这种白光发射的负热猝灭。共振拉曼散射的温度依赖性和密度泛函理论计算为这些解释提供了支持。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号