Two-Component Heterojunction-based Ambipolar Field Eﬀect Transistors for Improved Sensitivity of Ammonia Sensor

IF 8 1区化学 Q1 CHEMISTRY, ANALYTICAL

Sensors and Actuators B: Chemical Pub Date : 2024-10-20 DOI:10.1016/j.snb.2024.136814

Xiaoyue Shan, Jiagen Lai, Guanyu Qiao, Ziqiang Hu, Zichun Cong, Qingfang Ma, Qinghua Pan, Guoqiao Lai, Jian Song, Jianhua Gao

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Abstract

To improve the sensing response of ammonia (NH₃) sensors, a two-dimensional configuration molecule 5,11-di-naphthalen-2-yl-6,12-dihydro-indolocarbazole (ICZ-NA) was designed and synthesized as the p-channel organic semiconductor material. Bilayer organic field-effect transistor (OFET) was constructed with ICZ-NA and N,N’-bis(n-octyl)-2,6-dicyanonaphthalene-1,4,5,8-bis(dicarboximide (NDI-8CN₂) as p-type and n-type active semiconductor materials respectively, and the two-component devices exhibits excellent ambipolar FET performance. The thin film transistors based on single-component and two-component were further used as sensors for ammonia detection. Compared with the sensors based on NDI-8CN₂, the sensitivity and selectivity of ammonia detection based on two-component sensors have been greatly improved, and the ratio of current change can still be maintained over 3.65%, when the gas concentration lower to 10 ppb level. The higher sensing response and low limit of detection demonstrate that the two-component ambipolar configuration is a highly effective method for improving sensing response capability.

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用于提高氨气传感器灵敏度的基于双组分异质结的双极性场效应晶体管

为了提高氨气（NH3）传感器的传感响应，设计并合成了一种二维构型分子 5,11- 二萘-2-基-6,12-二氢-吲哚咔唑（ICZ-NA）作为 p 沟道有机半导体材料。以ICZ-NA和N,N'-双（正辛基）-2,6-二氰基萘-1,4,5,8-双（二甲酰亚胺）（NDI-8CN2）分别作为p型和n型活性半导体材料，构建了双层有机场效应晶体管（OFET）。基于单组分和双组分的薄膜晶体管被进一步用作氨检测传感器。与基于 NDI-8CN2 的传感器相比，基于双组分传感器的氨检测灵敏度和选择性都有了很大提高，当气体浓度低至 10 ppb 水平时，电流变化比仍能保持在 3.65% 以上。较高的传感响应和较低的检测限表明，双组分伏极结构是提高传感响应能力的一种非常有效的方法。

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来源期刊

Sensors and Actuators B: Chemical 工程技术-电化学

CiteScore

14.60

自引率

11.90%

发文量

1776

审稿时长

3.2 months

期刊介绍： Sensors & Actuators, B: Chemical is an international journal focused on the research and development of chemical transducers. It covers chemical sensors and biosensors, chemical actuators, and analytical microsystems. The journal is interdisciplinary, aiming to publish original works showcasing substantial advancements beyond the current state of the art in these fields, with practical applicability to solving meaningful analytical problems. Review articles are accepted by invitation from an Editor of the journal.