Fully Printed Inverters using Metal‐Oxide Semiconductor and Graphene Passives on Flexible Substrates,Physica Status Solidi-Rapid Research Letters

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Fully Printed Inverters using Metal‐Oxide Semiconductor and Graphene Passives on Flexible Substrates
Physica Status Solidi-Rapid Research Letters ( IF 2.5 ) Pub Date : 2020-06-22 , DOI: 10.1002/pssr.202000252
Surya Abhishek Singaraju ₁ , Gabriel Cadilha Marques _{1,

2} , Patric Gruber ₃ , Robert Kruk ₁ , Horst Hahn _{1,

4} , Ben Breitung _{1,

5} , Jasmin Aghassi-Hagmann _{1,

6}

Affiliation

Printed and flexible metal‐oxide transistor technology has recently demonstrated great promise due to its high performance and robust mechanical stability. Herein, fully printed inverter structures using electrolyte‐gated oxide transistors on a flexible polyimide (PI) substrate are discussed in detail. Conductive graphene ink is printed as the passive structures and interconnects. The additive printed transistors on PI substrates show an

I_{on} / I_{off}

ratio of

10^{6}

and show mobilities similar to the state‐of‐the‐art printed transistors on rigid substrates. Printed meander structures of graphene are used as pull‐up resistances in a transistor–resistor logic to create fully printed inverters. The printed and flexible inverters show a signal gain of 3.5 and a propagation delay of 30 ms. These printed inverters are able to withstand a tensile strain of 1.5% following more than 200 cycles of mechanical bending. The stability of the electrical direct current (DC) properties has been observed over a period of 5 weeks. These oxide transistor‐based fully printed inverters are relevant for digital printing methods which could be implemented into roll‐to‐roll processes.

中文翻译：

在柔性基板上使用金属氧化物半导体和石墨烯无源器件的全印刷反相器

由于其高性能和鲁棒的机械稳定性，印刷和柔性金属氧化物晶体管技术最近展现出了广阔的前景。本文将详细讨论在柔性聚酰亚胺（PI）基板上使用电解质门控氧化物晶体管的全印刷逆变器结构。导电石墨烯油墨被印刷为无源结构和互连。PI基板上的增材印刷晶体管显示出

{一世}_{上} / {一世}_{关}

的比例

10^{6}

并显示出与刚性基板上最先进的印刷晶体管相似的迁移率。石墨烯的印刷曲折结构在晶体管晶体管逻辑中用作上拉电阻，以创建完全印刷的反相器。印刷和柔性逆变器的信号增益为3.5，传播延迟为30 ms。这些印刷逆变器经过200次以上的机械弯曲循环后，能够承受1.5％的拉伸应变。在5周的时间内观察到了直流电（DC）特性的稳定性。这些基于氧化物晶体管的全印刷反相器与可以在卷对卷工艺中实现的数字印刷方法有关。

更新日期：2020-06-22

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