Three-dimensional monolithic integration in flexible printed organic transistors

Abstract

Direct printing of thin-film transistors has enormous potential for ubiquitous and lightweight wearable electronic applications. However, advances in printed integrated circuits remain very rare. Here we present a three-dimensional (3D) integration approach to achieve technology scaling in printed transistor density, analogous to Moore’s law driven by lithography, as well as enhancing device performance. To provide a proof of principle for the approach, we demonstrate the scalable 3D integration of dual-gate organic transistors on plastic foil by printing with high yield, uniformity, and year-long stability. In addition, the 3D stacking of three complementary transistors enables us to propose a programmable 3D logic array as a new route to design printed flexible digital circuitry essential for the emerging applications. The 3D monolithic integration strategy demonstrated here is applicable to other emerging printable materials, such as carbon nanotubes, oxide semiconductors and 2D semiconducting materials.

Universal three-dimensional crosslinker for all-photopatterned electronics

“…Fabrication of all-photopatterned p-type and n-type PTFTs with reliable operation enabled assembling these devices into functional complementary logic circuits, as shown in Fig. 5 46,47 .…”

A Fully Printed Flexible MoS2 Memristive Artificial Synapse with Femtojoule Switching Energy

“…[22][23][24][25][26][27][28] However, studies on printable RS media are lacking. It shows advantages beyond simple solution processed techniques such as spin coating, particularly for large scale fabrication.…”

“…It shows advantages beyond simple solution processed techniques such as spin coating, particularly for large scale fabrication. [22][23][24][25][26][27][28][29] However, the presence of defect density/vacancies in solution exfoliated 2DM crystals is found to compromise the electrical performance. Among the conventional RS media, including transition metal oxides (TMOs, e.g., HfO 2 , Al 2 O 3 , TiO 2 ), [4,9,10,16] polymers, [15] and two-dimensional materials (2DMs), [7,8,[11][12][13][14][17][18][19][20][21] the latter shows great potential to realize printed memristors with their solution processability and inherent flexibility.…”

“…[1,2] To build such a flexible neuromorphic system, the fabrication of memristors equipped with synaptic functions is a key step to forming the artificial neural network. [22][23][24][25][26][27][28] The printing technique is shown to offer more freedom in the design of Realization of memristors capable of storing and processing data on flexible substrates is a key enabling technology toward "system-on-plastics". Efforts in finding low temperature fabrication technique and robust resistive switching (RS) material are essential to equip the SOP with the data storage and processing capability demanded by target applications.…”

Solution‐Processed Centimeter‐Scale Highly Aligned Organic Crystalline Arrays for High‐Performance Organic Field‐Effect Transistors

“…Organic field‐effect transistors (OFETs) have attracted significant attention for their low‐cost and flexibility which can be used for potential applications in display drivers, radio frequency identification tags, and logic circuits 1–6. Soluble organic semiconductors (OSCs), including small molecular weight materials and conjugated polymers, are especially interesting due to their solution processability, which ensures cost‐effective manufacturing by high‐throughput and continuous methods on flexible substrates 7.…”