Investigation of donor/acceptor interactions toward high-performance organic near-infrared (NIR) lasers beyond 900 nm

研究超过 900 nm 的高性能有机近红外 (NIR) 激光器的供体/受体相互作用

• 批准号: 22K20536
• 负责人: TANG XUN
• 金额: $ 1.83万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Research Activity Start-up
• 财政年份: 2022
• 资助国家: 日本
• 起止时间: 2022-08-31 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-22K20536/
• 关键词: Organic lasers; D/A interactions; Near-infrared; organic lasers; near-infrared (NIR)

Donor (D) and acceptor (A) interactions have been evidenced as an effective strategy to redshift emission, but are commonly not preferred for lasing. The purpose of our work is to clarify and manipulate the D-A interactions for realizing high performance near-infrared (NIR) organic lasers. In this year, we built up a strong D-spacer-A molecular skeleton,several molecules have been designed by substituting D/A fragments, and inserting various functional spacers. For triphenylamine (TPA)/benzo[1,2-c:4,5c’]bis[1,2,5]thiadiazole (BBTD) based structure, we have theoretically predicted the photophysical properties by density functional theory calculation and synthesized the promising molecules. The photophysical properties and lasing performance have been initially evaluated, two D-A-D type molecules with different donor moieties exhibited NIR emission in toluene, the corresponding wavelength peaks were around 790 nm. These two molecules showed good photoluminescence quantum yields (PLQYs) in blend solid-state films, relatively fast radiative rates, and promising amplified spontaneous emission (ASE)/lasing performance. Up to now, one Perspective paper, which includes the organic lasing dyes from ultraviolet to NIR, insights of triplet manipulation in organic lasing, and advanced optical resonators, has been accepted. Also, one oral prsentation in JSAP spring 2023 conference has been finished.

施主(D)和受体(A)的相互作用已被证明是一种有效的红移发射策略，但通常不适合用于激光。我们工作的目的是阐明和操纵D-A相互作用，以实现高性能的近红外(NIR)有机激光器。在这一年里，我们构建了一个强大的D-间隔基-A分子骨架，通过取代D/A片段，并插入各种功能间隔基，设计了几个分子。对于三苯胺(TPA)/苯并[1，2-c：4，5c‘]双[1，2，5]噻二唑(BBTD)结构，通过密度泛函理论计算，对其光物理性质进行了理论预测，合成了具有应用前景的分子。对其光物理性质和激光性能进行了初步评价，两种不同给电子基团的D-A-D型分子在甲苯溶液中均有近红外发射，对应的波长峰位于790 nm附近。这两个分子在混合固态薄膜中表现出良好的光致发光量子产率(PLQY)、较快的辐射速率和良好的放大自发辐射(ASE)/激光性能。到目前为止，一篇透视论文已经被接受，其中包括从紫外光到近红外的有机激光染料，有机激光中三重态操纵的见解，以及先进的光学谐振器。此外，JSAP 2023年春季会议的一次口头演示已经完成。

项目成果

Progress and Perspective toward Continuous-Wave Organic Solid-State Lasers

• DOI: 10.1002/adma.202211873
• 发表时间: 2023-05-10
• 期刊: ADVANCED MATERIALS
• 影响因子: 29.4
• 作者: Tang，Xun;Senevirathne，Chathuranganie A. M.;Adachi，Chihaya
• 通讯作者: Adachi，Chihaya