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基于石墨烯-半导体-聚合物纳米复合材料制备的肖特基二极管电极气敏性能的对比研究。

Comparative study on gas sensing by a Schottky diode electrode prepared with graphene-semiconductor-polymer nanocomposites.

作者信息

Biswas Md Rokon Ud Dowla, Oh Won-Chun

机构信息

Department of Advanced Materials Science & Engineering, Hanseo University Seosan-si Chungnam 356-706 Korea

出版信息

RSC Adv. 2019 Apr 11;9(20):11484-11492. doi: 10.1039/c9ra00007k. eCollection 2019 Apr 9.

DOI:10.1039/c9ra00007k
PMID:35520227
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9063416/
Abstract

This paper studies the performance of a gas sensor based on an organic/inorganic diode for ammonia (NH), nitrogen (N) & oxygen (O) sensing under atmospheric conditions at room temperature and different humidity levels. The diode structure consists of a layer of different kinds of polymer (PTFE, PVDF, PANI) deposited on top of BiVO. The polymer layer, which is filled with different ratios of graphene oxide (GO), is prepared from the solution phase. We show that the current-voltage (-) response of the diode and the sensing performance are improved significantly by adding GO to the polymer layer. The sensing response is highest for a diode with 0.04 wt% of GO. At room temperature, the poly-GO (0.04 wt%)/BiVO Schottky diode shows a sensitivity of 194 ppm upon exposure to 20 ppm of NH in ambient air with rapid response and recovery times between 95 and 101 s, respectively. The sensor based on the polymer-GO diode is cost-effective, environmentally friendly, and easy to fabricate using low-cost solution-processing methods.

摘要

本文研究了一种基于有机/无机二极管的气体传感器在室温及不同湿度水平的大气条件下对氨气（NH₃）、氮气（N₂）和氧气（O₂）的传感性能。该二极管结构由一层沉积在BiVO₄顶部的不同种类聚合物（聚四氟乙烯、聚偏氟乙烯、聚苯胺）组成。填充有不同比例氧化石墨烯（GO）的聚合物层由溶液相制备而成。我们表明，通过向聚合物层中添加GO，二极管的电流-电压（I-V）响应和传感性能得到了显著改善。对于含有0.04 wt% GO的二极管，传感响应最高。在室温下，聚-GO（0.04 wt%）/BiVO₄肖特基二极管在暴露于环境空气中20 ppm的NH₃时显示出194 ppm的灵敏度，响应和恢复时间分别在95至101秒之间，速度很快。基于聚合物-GO二极管的传感器具有成本效益、环境友好，并且易于使用低成本溶液处理方法制造。

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