Extremely Efficient Photocurrent Generation in Carbon Nanotube Photodiodes Enabled by a Strong Axial Electric Field.,Nano Letters

当前位置： X-MOL 学术 › Nano Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Extremely Efficient Photocurrent Generation in Carbon Nanotube Photodiodes Enabled by a Strong Axial Electric Field.
Nano Letters ( IF 9.6 ) Pub Date : 2019-12-27 , DOI: 10.1021/acs.nanolett.9b04151
Daniel R McCulley ₁ , Mitchell J Senger ₁ , Andrea Bertoni ₂ , Vasili Perebeinos ₃ , Ethan D Minot ₁

Affiliation

Carbon nanotube (CNT) photodiodes have the potential to convert light into electrical current with high efficiency. However, previous experiments have revealed the photocurrent quantum yield (PCQY) to be well below 100%. In this work, we show that the axial electric field increases the PCQY of CNT photodiodes. Under optimal conditions, our data suggest PCQY > 100%. We studied, both experimentally and theoretically, CNT photodiodes at room temperature using optical excitation corresponding to the S22, S33, and S44 exciton resonances. The axial electric field inside the pn junction was controlled using split gates that are capacitively coupled to the suspended CNT. Our results give new insight into the photocurrent generation pathways in CNTs and the field dependence and diameter dependence of PCQY.

中文翻译：

在碳纳米管光电二极管中通过强轴向电场实现极其高效的光电流生成。

碳纳米管（CNT）光电二极管具有将光高效转换为电流的潜力。但是，先前的实验表明光电流量子产率（PCQY）远低于100％。在这项工作中，我们表明轴向电场增加了CNT光电二极管的PCQY。在最佳条件下，我们的数据表明PCQY> 100％。我们在实验和理论上都使用与S22，S33和S44激子共振相对应的光激发在室温下研究了CNT光电二极管。pn结内部的轴向电场是使用分裂栅控制的，该分裂栅与悬浮的CNT电容耦合。我们的结果提供了对碳纳米管中光电流产生途径以及PCQY的场依存性和直径依存性的新见解。

更新日期：2019-12-27

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11