High-performance Organic Transistor Ammonia Sensor with Laminated Ultrathin Film Structure

被引：0
|
作者：
Chen H. [1 ]
Hu Q. [1 ]
Qiu L.-Z. [1 ]
Wang X.-H. [1 ]
机构：
[1] National Engineering Lab of Special Display Technology, National Key Lab of Advanced Display Technology, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei
来源：
Wang, Xiao-Hong (xhwang11@hfut.edu.cn) | 1600年 / Editorial Office of Chinese Optics卷 / 42期
基金：
中国国家自然科学基金;
关键词：
Ammonia gas detection; Donor-acceptor conjugated polymer; Organic ultra-thin film transistor; Ultrathin film stack;
D O I：
10.37188/CJL.20210107
中图分类号：
学科分类号：
摘要：
The electrical properties and the ammonia sensing transistor characteristics of ultrathin film laminated transistors based on donor-acceptor conjugated polymer bis(2-oxoindole-3-ylidene)-benzodifuran-dione and bithiophene(PBIBDF-BT) were studied. The PBIBDF-BT ultrathin films with different stacking layers were prepared by phase separation method and transfer-etching step. The relationship between the number of PBIBDF-BT ultrathin film stacks and the performance of the device were systematically studied. Experimental results indicate that the single-layer PBIBDF-BT ultrathin film device has good sensing performance for ammonia, but the electrical performance is poor. Ultrathin film stacking can effectively improve the electrical performance of the device. As the number of ultrathin film stacks increases, the device mobility increased. When the number of ultrathin film layers increases to 3 layers or more, the increasing trend of mobility slows down and the maximum mobility is 0.58 cm2•V-1•s-1. The ammonia sensing performance of ultrathin film laminate devices shows a downward trend when the number of layers is 2. Through the PBIBDF-BT ultrathin film stacking method, an OFET ammonia gas sensor with good performance was prepared under 1.0×10-5 ammonia environment, with a mobility of 0.23 cm2•V-1•s-1, the source-drain current change percentage of 90.7%. © 2021, Science Press. All right reserved.
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页码：871 / 879
页数：8
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