Triboelectric Nanogenerator Enhanced Schottky Nanowire Sensor for Highly Sensitive Ethanol Detection.,Nano Letters

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Triboelectric Nanogenerator Enhanced Schottky Nanowire Sensor for Highly Sensitive Ethanol Detection.
Nano Letters ( IF 9.6 ) Pub Date : 2020-06-17 , DOI: 10.1021/acs.nanolett.0c01063
Jianping Meng ₁ , Hu Li _{1,

2} , Luming Zhao _{1,

3} , Junfeng Lu ₁ , Caofeng Pan _{1,

3,

4} , Yan Zhang _{1,

5} , Zhou Li _{1,

3,

4}

Affiliation

Highly sensitive ethanol sensors are important for environmental and industrial monitoring. In our work, we demonstrate a method to enhance the response of a Schottky sensor based on a ZnO nano/microwire (NMW) by triboelectric nanogenerator (TENG). Via lowering the Schottky barrier height (SBH) via the high voltage from TENG, the response of the sensor is enhanced by 139% for 100 ppm ethanol. This method accelerates the recovery process. The high voltage from TENG produces a high intensity electric field to drive diffusion of the oxygen vacancies in ZnO NMW toward to the junction area around the interface. It is equivalent to applying the reverse voltage on the Schottky junction, which leads to the increase of depletion width. More chemisorbed oxygen on the depletion region is consumed once the ethanol gas is injected into the chamber, which improves the response of the ethanol sensor. This study provides a new, simple, and effective method to improve the sensor response.

中文翻译：

摩擦电纳米发生器增强的肖特基纳米线传感器，用于高灵敏度乙醇检测。

高度敏感的乙醇传感器对于环境和工业监控非常重要。在我们的工作中，我们演示了一种通过摩擦电纳米发电机（TENG）增强基于ZnO纳米/微线（NMW）的肖特基传感器的响应的方法。通过使用TENG的高压降低肖特基势垒高度（SBH），对于100 ppm乙醇，传感器的响应提高了139％。此方法加快了恢复过程。来自TENG的高电压会产生高强度电场，以驱使ZnO NMW中的氧空位扩散到界面周围的结区。这等效于在肖特基结上施加反向电压，这会导致耗尽层宽度的增加。一旦将乙醇气体注入腔室，消耗区域上更多的化学吸附氧就会被消耗掉，从而改善了乙醇传感器的响应。这项研究提供了一种新的，简单而有效的方法来改善传感器的响应。

更新日期：2020-07-08

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