苝
激光阈值
光致发光
堆积
量子产额
光化学
放大自发辐射
分子间力
材料科学
共轭体系
分子
激光线宽
吸收(声学)
化学
激光器
光电子学
聚合物
波长
荧光
有机化学
光学
复合材料
物理
作者
Yu Zou,Víctor Bonal,Sergio Moles Quintero,Pedro G. Boj,José M. Villalvilla,José A. Quintana,Guangwu Li,Shaofei Wu,Qing Jiang,Yong Ni,Juan Casado,María A. Díaz-García,Jishan Wu
标识
DOI:10.1002/anie.202004789
摘要
Abstract Perylene‐fused, aggregation‐free polycyclic aromatic hydrocarbons with partial zigzag periphery ( ZY‐01 , ZY‐02 , and ZY‐03 ) were synthesized. X‐ray crystallographic analysis reveals that there is no intermolecular π–π stacking in any of the three molecules, and as a result, they show moderate‐to‐high photoluminescence quantum yield in both solution and in the solid state. They also display the characteristic absorption and emission spectra of perylene dyes. ZY‐01 and ZY‐02 with a nearly planar π‐conjugated skeleton exhibit amplified spontaneous emission (ASE) when dispersed in polystyrene thin films. Solution‐processed distributed feedback lasers have been fabricated using ZY‐01 and ZY‐02 as active gain materials, both showing narrow emission linewidth (<0.4 nm) at wavelengths around 515 and 570 nm, respectively. In contrast, ZY‐03 did not show ASE and lasing, presumably due to its highly twisted backbone, which facilitates nonradiative internal conversion and intersystem crossing.
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