Laser-patterned vertical organic electrochemical transistor arrays for neuromorphic flexible electronics
- 주제(키워드) Organic electrochemical transistors , Laser Via hole etching , Synaptic transistors , Vertical OECT , High-density Integration , Wearable Bioelectronics
- 발행기관 아주대학교 일반대학원
- 지도교수 박성준
- 발행년도 2025
- 학위수여년월 2025. 8
- 학위명 석사
- 학과 및 전공 일반대학원 지능형반도체공학과
- 실제URI http://www.dcollection.net/handler/ajou/000000035039
- 본문언어 한국어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Organic electrochemical transistors (OECTs) have emerged as promising candidates for wearable and neuromorphic synaptic devices due to their biocompatibility, mechanical flexibility, and efficient ion-electron coupling. These properties enable real-time signal processing and low-power neuromorphic computing. However, miniaturization and high-density integration remain challenging due to limitations in patterning resolution and insufficient control over channel dimensions, which restricts precise conductance tuning. In this study, we present a flexible 16×16 array-type vertical OECT fabricated via laser via hole etching, achieving high performance and enhanced integration density. The laser patterning process enables precise control of channel width, allowing tunable conductance modulation. By incorporating an ion gel electrolyte, the device exhibits non-volatile behavior and supports stable synaptic states. Based on its high conductance capability, 10-bit level conductance modulation is achieved, enabling fine-grained synaptic weight control. This vertical OECT array overcomes the limitations of conventional planar structures and demonstrates strong potential for high-density neuromorphic hardware. Its compact architecture and tunable properties make it well-suited for next-generation bioelectronic interfaces and energy-efficient artificial synapses.
more목차
1. Background 1
1.1 Overview of Organic Electrochemical Transistors (OECTs) 1
1.2 Fundamental Working Mechanisms of OECTs 1
1.3 Structural Innovations and Device Architecture of OECTs 2
1.4 Synaptic Behavior of OECTs for Neuromorphic Computing 3
1.5 Emergence of OECT Arrays for Scalable Neuromorphic Applications 4
1.6 Laser-Based Microfabrication Techniques for Precise Structural Control 5
1.7 Flexible Neuromorphic OECT Architectures 6
2. Introduction 8
2.1 Challenges in Achieving Scalable Neuromorphic OECT Architectures 8
2.2 Importance of Vertical Channel Structures in Neuromorphic Performance 10
2.3 Precision Structural Control via Laser-Based Microfabrication 12
2.4 Laser-Based Microfabrication in Enhancing Flexible Neuromorphic OECTs 15
2.5 The Necessity of Multi-Level State Flexible Neuromorphic OECTs 17
3. Results and discussion 18
3.1 Principle and Method of Laser Patterning Technology 18
3.2 Electrical characterization of p-OECT & v- OECT 22
3.3 Comparison of Laser-Fabricated and Photolithography-Based Devices 28
3.4 Mechanical characterization of v-OECT array 29
3.5 Electrical characterization of non-volatile OECT 35
4. Conclusions 43
5. Experimental section 44
5.1 Materials 44
5.2 Flexible substrate fabrication 44
5.3 Laser processed OECT fabrication 44
5.4 Device Characterization and Analysis 45
5.5 Synaptic device measurement experiment 45
5.6 Mechanical stability test of flexible OECT 46
6. References 47
