Ultra-Narrowband Near-Infrared Responsive J-Aggregates of Fused Quinoidal Tetracyanoindacenodithiophene.
Ultra-Narrowband Near-Infrared Responsive J-Aggregates of Fused Quinoidal Tetracyanoindacenodithiophene.
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稠合醌型四氰并二苯并二噻吩的超窄带近红外响应 J 聚集体。
DOI：
10.1002/adma.202209800
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
He Q
中科院分区：
文献类型：
--
作者：
He Q
窄带光响应分子在高分辨率成像、传感和单色光检测中非常受欢迎，特别是那些延伸到近红外（NIR）光谱范围的分子。在这里，报道了一类基于醌式引达省二噻吩（IDT）的新型J聚集材料，其表现出以770 nm为中心的超窄带（22 nm的半峰全宽）NIR吸收峰。光谱宽度很容易通过增溶烷基的长度来调节，较长的链导致显着的光谱变窄。J-聚集体行为通过激发态寿命测量和单晶X射线衍射测量的组合来确认。它们作为电子传输材料的实用性在晶体管和光电晶体管器件中都得到了证明，后者在NIR波长（780 nm）下在一定强度范围内表现出良好的响应。
Narrowband photoresponsive molecules are highly coveted in high‐resolution imaging, sensing, and monochromatic photodetection, especially those extending into the near‐infrared (NIR) spectral range. Here, a new class of J‐aggregating materials based on quinoidal indacenodithiophenes (IDTs) that exhibit an ultra‐narrowband (full width half maxima of 22 nm) NIR absorption peak centered at 770 nm is reported. The spectral width is readily tuned by the length of the solubilizing alkyl group, with longer chains resulting in significant spectral narrowing. The J‐aggregate behavior is confirmed by a combination of excited state lifetime measurements and single‐crystal X‐ray diffraction measurements. Their utility as electron‐transporting materials is demonstrated in both transistor and phototransistor devices, with the latter demonstrating good response at NIR wavelengths (780 nm) over a range of intensities.