Multispectral and Circular Polarization-Sensitive Carbon Dot-Polydiacetylene Capacitive Photodetector,Small

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Multispectral and Circular Polarization-Sensitive Carbon Dot-Polydiacetylene Capacitive Photodetector
Small ( IF 13.0 ) Pub Date : 2022-12-11 , DOI: 10.1002/smll.202206519
Nitzan Shauloff ₁ , Rajesh Bisht ₁ , Yury Turkulets ₂ , Rajendran Manikandan ₁ , Ahiud Morag ₁ , Avi Lehrer ₁ , Joshua H Baraban ₁ , Ilan Shalish ₂ , Raz Jelinek _{1,

3}

Affiliation

Multispectral photodetectors (MSPs) and circularly polarized light (CPL) sensors are important in opto-electronics, photonics, and imaging. A capacitive photodetector consisting of an interdigitated electrode coated with carbon dot/anthraquinone-polydiacetylene is constructed. Photoexcitation of the carbon dots induces transient electron transfer to the anthraquinone moieties, and concomitant change in the film dielectric constant and recorded capacitance. This unique photodetection mechanism furnishes wavelength selectivity that is solely determined by the absorbance of the carbon dots incorporated in the anthraquinone-polydiacetylene matrix. Accordingly, employing an array of polymerized-anthraquinone photodetector films comprising carbon dots (C-dots) exhibiting different excitation wavelengths yielded optical “capacitive fingerprints” in a broad spectral range (350–650 nm). Furthermore, circular light polarization selectivity is achieved through chiral polymerization of the polydiacetylene framework. The carbon dot/anthraquinone-polydiacetylene capacitive photodetector features rapid photo-response, high fidelity, and recyclability as the redox reactions of anthraquinone are fully reversible. The carbon dot/anthraquinone-polydiacetylene platform is inexpensive, easy to fabricate, and consists of environmentally friendly materials.

中文翻译：

多光谱圆偏振敏感碳点聚二乙炔电容光电探测器

多光谱光电探测器 (MSP) 和圆偏振光 (CPL) 传感器在光电子学、光子学和成像领域非常重要。构建了由涂有碳点/蒽醌-聚二乙炔的叉指电极组成的电容式光电探测器。碳点的光激发引起瞬时电子转移到蒽醌部分，并伴随薄膜介电常数和记录电容的变化。这种独特的光电检测机制提供了波长选择性，该选择性仅由蒽醌-聚二乙炔基质中碳点的吸光度决定。因此，采用一系列包含碳点（C点）的聚合蒽醌光电探测器薄膜，表现出不同的激发波长，产生了宽光谱范围（350-650 nm）的光学“电容指纹”。此外，通过聚二乙炔骨架的手性聚合实现了圆光偏振选择性。碳点/蒽醌-聚二乙炔电容式光电探测器具有快速光响应、高保真度和可回收性等特点，因为蒽醌的氧化还原反应是完全可逆的。碳点/蒽醌-聚二乙炔平台价格便宜，易于制造，并且由环保材料组成。

更新日期：2022-12-11

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