Electroluminescence from 4-nitroaryl organic color centers in semiconducting single-wall carbon nanotubes
Electroluminescence from 4-nitroaryl organic color centers in semiconducting single-wall carbon nanotubes
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DOI：
10.1063/5.0039047
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发表时间：
2021-01
影响因子：
3.2
通讯作者：
Beibei Xu;Xiaojian Wu;Mijin Kim;Peng Wang;YuHuang Wang
中科院分区：
文献类型：
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作者：
Beibei Xu;Xiaojian Wu;Mijin Kim;Peng Wang;YuHuang Wang
单壁碳纳米管上的有机色心(OCC)是一种量子缺陷，在生物成像、化学传感和量子通信等领域具有重要的近红外发射性能。其中许多应用将需要电抽运而不是光激发来确定地获得OCCS的近红外发射特性，尽管这还没有实现。在这项工作中，我们报道了在(6，5)-单壁碳纳米管上有意引入的4-硝基芳基OCCS的近红外电致发光的实验观察。空间相关的光致发光和电致发光光谱揭示了半导体纳米管主体上OCCS的局域电致发光的直接证据。电致发光强度与源漏电流呈指数关系，表明单极载流子在量子缺陷处的碰撞激发是观察到的发射的来源。这些电致发光量子缺陷可能为OCCS在显示、传感器和自旋器件以及其他量子技术中的潜在应用铺平道路。
Organic color-centers (OCCs) on single-wall carbon nanotubes are quantum defects that demonstrate intriguing near-infrared emission properties with potential for bioimaging, chemical sensing, and quantum communication. Many of these applications will require electrical pumping rather than optical excitation to deterministically access the near-infrared emission properties of OCCs, though this has yet to be achieved. In this work, we report experimental observation of near-infrared electroluminescence from 4-nitroaryl OCCs intentionally introduced on (6,5)-single-wall carbon nanotubes that are aligned across a pair of gold electrodes. Spatially correlated photoluminescence and electroluminescence spectroscopy reveal direct evidence of the localized electroluminescence from the OCCs on the semiconducting nanotube hosts. The electroluminescence intensity displays an exponential dependence on the source–drain current, suggesting that impact excitation by unipolar carriers at the quantum defects is the origin of the observed emission. These electroluminescent quantum defects may pave the way to enable on-chip integration for potential applications of OCCs in display, sensor, and spin-based devices, as well as other quantum technologies.