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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Polymeric Nanocomposites Involving a Physical Blend of IR Sensitive Quantum Dots and Carbon Nanotubes for Photodetection
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Polymeric Nanocomposites Involving a Physical Blend of IR Sensitive Quantum Dots and Carbon Nanotubes for Photodetection

机译：聚合物纳米复合材料，涉及红外敏感量子点和碳纳米管的物理混合物，用于光检测

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A photodetecting device with enhanced efficiency has been fabricated by using a blend of IR sensitive quantum dots (QDs) and carbon nanotubes (CNTs). Measurements on the facile physical mixtures of PbSe QDs, and CNTs in compatible solvents show quenching of the IR photoluminescence of QDs due to the presence of the CNTs. This effect, verified for QDs with emission at different wavelengths, is envisaged to originate from the electron transfer from QDs adsorbed on the surface of CNTs, similar to that occurring when the QDs are chemically conjugated to CNTs, as reported in the literature. An appreciable increase is observed in the photocurrent of the polymeric photodetector devices (made with P30T as the polymer host) fabricated with a QDs/CNTs mixture when compared to PbSe:P30T without CNTs. These studies demonstrate that electron transfer from QDs to CNT is achievable by simple physical mixing, apparently obviating the need of a cumbersome chemical process of conjugation between CNTs and QDs.
机译：已经通过使用IR敏感量子点（QD）和碳纳米管（CNT）的混合物制造了具有增强效率的光电检测装置。在兼容溶剂中对PbSe QD和CNTs的简便物理混合物的测量表明，由于CNT的存在，QDs的IR光致发光猝灭了。如在文献中报道的那样，设想这种效应已针对具有不同波长发射的QD进行了验证，该效应源自吸附在CNT表面上的QD的电子转移，类似于将QD化学偶联到CNT时发生的电子转移。与没有CNT的PbSe：P30T相比，使用QDs / CNTs混合物制造的聚合物光电探测器装置（以P30T​​作为聚合物主体制造）的光电流观察到明显增加。这些研究表明，通过简单的物理混合就可以实现从QDs到CNT的电子转移，显然消除了CNTs和QDs共轭过程繁琐的化学过程。

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