材料科学
窄带
光探测
光电子学
近红外光谱
光谱宽度
红外线的
吸收(声学)
光学
波长
光电探测器
物理
复合材料
作者
Qiao He,Aniruddha Basu,Hyojung Cha,Matyas Daboczi,Julianna Panidi,Luxi Tan,Xiantao Hu,Chi Cheng Huang,Bowen Ding,Andrew J. P. White,Jinhyun Kim,James R. Durrant,Thomas D. Anthopoulos,Martin Heeney
标识
DOI:10.1002/adma.202209800
摘要
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.
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