来自小分子有机半球的近红外激光
Xuedong Wang1,2, Qing Liao3, Hui Li1,2
1†Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
Journal of the American Chemical Society
|July 8, 2015
概括
研究人员开发了一种新的有机分子DPHP,它可以自组装成微半球,用于高效的近红外 (NIR) 有机激光器. 这一突破克服了传统半导体激光器的局限性,使低成本,解决方案处理的NIR光源成为可能.
科学领域:
- 有机电子学有机电子学
- 光子学 是一个光子学.
- 材料科学是一种材料科学.
背景情况:
- 近红外 (NIR) 激光对于电信,成像和光谱学至关重要.
- 目前的无机NIR激光器 (例如GaAs) 制造成本昂贵且复杂.
- 有机半导体提供调节性质和解决方案可加工性,但面临诸如低刺激排放和激子-激子消灭等挑战.
研究的目的:
- 设计和合成一种新的有机分子,用于高效的NIR激光.
- 克服有机NIR激光器发展的主要障碍,包括快速的非辐射衰变和激子-激子消灭.
- 为增强NIR发射创造一个自组装的微腔.
主要方法:
- 合成了一种新型的两性小型有机分子, (E) -3 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 的新型分子,即 (E) - - 3 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
- 描述DPHP的自我组装成微米大小的半球.
- 评价光发光的量子效率,辐射速率的增强和微空洞特性 (高Q低声画廊模式).
- 在单个DPHP半球中在室温下展示NIR激光.
主要成果:
- DPHP自组装成发射NIR的半球,作为高Q (∼1.4 × 10 ^ 3) 低声画廊模式微腔.
- 由于刺激-振动合和J型分子合,实现了约15.2%的光发光量子效率和增强的辐射速率 (约1.98 × 10^9 s^-1).
- 消除了激子-激子消灭,这是有机激光器中关键的损失通道.
- 在单个DPHP半球中证明了室温NIR激光的低值 (∼610nJ/cm^2).
结论:
- 开发的DPHP分子及其自组装半球代表了有机NIR激光器的重大进步.
- 这项工作为低成本,溶液加工的有机连贯光源铺平了道路.
- 这些发现有助于将有机NIR激光器集成到紧的光电子设备中.
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