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.

供体(D)和受体(A)相互作用已被证明是一种有效的红移发射策略，但通常不适合激光。我们的工作目的是澄清和操纵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，我们建立了一个强大的D-间隔- a分子骨架，通过替换D/ a片段，并插入各种功能间隔，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）基结构，我们通过密度泛函理论计算理论上预测了其光物理性质，并合成了有前景的分子。对其光物理性质和激光性能进行了初步评价，两种不同给体部分的D-A-D型分子在甲苯中表现出近红外发射，对应的波长峰在790nm左右。这两种分子在共混固体薄膜中表现出良好的光致发光量子产率（PLQYs），相对较快的辐射速率，以及有前景的放大自发发射(ASE)/激光性能。到目前为止，已经收到了一篇透视论文，内容包括从紫外到近红外的有机激光染料，有机激光中三重态操作的见解，以及先进的光学谐振器。并在JSAP 2023春季会议上完成了一篇口头报告。

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