Sub-thermionic, ultra-high-gain organic transistors and circuits

Author:

Luo Zhongzhong,Peng Boyu,Zeng Junpeng,Yu Zhihao,Zhao Ying,Xie Jun,Lan Rongfang,Ma Zhong,Pan LijiaORCID,Cao Ke,Lu YangORCID,He Daowei,Ning Hongkai,Meng Wanqing,Yang Yang,Chen Xiaoqing,Li Weisheng,Wang Jiawei,Pan Danfeng,Tu XuecouORCID,Huo Wenxing,Huang Xian,Shi Dongquan,Li Ling,Liu Ming,Shi YiORCID,Feng Xue,Chan Paddy K. L.ORCID,Wang XinranORCID

Abstract

AbstractThe development of organic thin-film transistors (OTFTs) with low power consumption and high gain will advance many flexible electronics. Here, by combining solution-processed monolayer organic crystal, ferroelectric HfZrOx gating and van der Waals fabrication, we realize flexible OTFTs that simultaneously deliver high transconductance and sub-60 mV/dec switching, under one-volt operating voltage. The overall optimization of transconductance, subthreshold swing and output resistance leads to transistor intrinsic gain and amplifier voltage gain over 5.3 × 104 and 1.1 × 104, respectively, which outperform existing technologies using organics, oxides and low-dimensional nanomaterials. We further demonstrate battery-powered, integrated wearable electrocardiogram (ECG) and pulse sensors that can amplify human physiological signal by 900 times with high fidelity. The sensors are capable of detecting weak ECG waves (undetectable even by clinical equipment) and diagnosing arrhythmia and atrial fibrillation. Our sub-thermionic OTFT is promising for battery/wireless powered yet performance demanding applications such as electronic skins and radio-frequency identification tags, among many others.

Publisher

Springer Science and Business Media LLC

Subject

General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry

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