유연인쇄전자학술지(Journal of Flexible and Printed Electronics)

About Journal of Flexible and Printed Electronics

유연인쇄전자학술지는 2022년부터 한국유연인쇄전자학회에서 정기적으로 발행하는 정식 국문 학술지로서 한국유연인쇄전자학회가 국내·외 최신 유연인쇄전자관련 기술과 학문의 발전을 선도할 수 있게 하는데 목적을 두고 있습니다. 보다 구체적으로는 유연한 기판 위에 기능성 소재의 패턴을 쌓아 올려 구현되는 유연인쇄전자 시스템에 요구되는 기능성 재료 (유기, 무기, 유무기 하이브리드 및 나노 구조체, 재료전산과학), 유연인쇄전자 시스템을 구성하는 소자 및 회로 (전기·전자 소자 및 회로, 광소자 또는 초소형 기계소자), 그리고 유연인쇄전자 시스템을 제조하는데 필요한 공정 및 장비 등을 망라하는 최첨단의 기술을 개발하고 해당 기술의 원리에 대한 학술적 담론과 산업적 응용 (웨어러블 전자소자, 디스플레이, 에너지, 사물인터넷, 바이오·헬스케어 등)을 나눌 수 있는 마당을 온/오프라인 출판물을 통해 제공하는 것을 최우선 목적으로 합니다. 유연인쇄전자학술지는 이러한 최우선 목적을 실현하기 위해 유연인쇄전자 시스템과 관련된 재료, 소자, 그리고 공정 및 장비의 각 분야 또는 특정 주제에 대해 본 학술지에서 안내하는 일정 형식을 갖춘 연구논문과 최신 기술 동향 총설의 형태로 일정량의 논문을 연 2회 이상 발행합니다.
REVIEW

Jun 30, 2026

Mechanisms of Negative Capacitance in Organic Light-Emitting Diodes: A Review

Byeongyun Kim, Donghyun Ko, Jaesang Lee

J. Flex. Print. Electron. 2026;5(1):1-19.
https://doi.org/10.56767/jfpe.250027

Negative capacitance (NC) in organic light-emitting diodes (OLEDs) has emerged as a sensitive probe of non-equilibrium charge dynamics, yet its physical origin remains under active debate. This review provides a comprehensive overview of NC in OLEDs, focusing on how it arises from delayed and imbalanced charge responses under electrical modulation. We first summarize how NC manifests in capacitance–voltage, capacitance–frequency, Nyquist, and Bode plots, and outline the theoretical frameworks used to extract capacitance from impedance and t...
REVIEW

Jun 30, 2026

Quantum Dot Patterning Techniques for High-Resolution AR/VR Displays
초고해상도 AR/VR 디스플레이를 위한 양자점 패터닝 기술

Junhyeok Park, Soong Ju Oh
박준혁, 오승주

J. Flex. Print. Electron. 2026;5(1):21-33.
https://doi.org/10.56767/jfpe.250024
REVIEW

Jun 30, 2026

Recent Advances in Soft Electromagnetic Devices for Wearable Applications
웨어러블 응용을 위한 소프트전자기파 소자 기술 동향

Hoon Yeub Jeong
정훈엽

J. Flex. Print. Electron. 2026;5(1):35-50.
https://doi.org/10.56767/jfpe.260004
REVIEW

Jun 30, 2026

Recent Advances in AI-Driven Inkjet Printing

Seongju Kim

J. Flex. Print. Electron. 2026;5(1):51-67.
https://doi.org/10.56767/jfpe.260005

The inkjet printing process requires an understanding of the physical behavior that governs droplet generation, deposition, and film formation. Artificial intelligence (AI) is becoming a key technology for the inkjet printing technologies by extracting meaningful patterns in relationships between complicated features. This review summarizes recent AI-based methodologies for jetting behavior prediction, abnormal jetting detection, waveform optimization, process monitoring, and film formation control. The remaining challenges and future opportuni...
REVIEW

Jun 30, 2026

Printed Graphene-Based Interconnects and Vias for Flexible Hybrid Electronics

Ganapathi Bharathi, Seongin Hong

J. Flex. Print. Electron. 2026;5(1):69-106.
https://doi.org/10.56767/jfpe.260006

Graphene-based inks are emerging as a mechanically resilient alternative to silver and copper nanoparticle systems for printed interconnects in flexible hybrid electronics (FHE). Unlike brittle metallic films, graphene flake networks survive repeated bending through crack bridging and percolation reconfiguration. However, the intrinsic-to-practical conductivity gap remains the central challenge: inter-flake junction resistance places printed film conductivity orders of magnitude below bulk metals. This review examines graphene ink formulation, ...
RESEARCH

Jun 30, 2026

Hydrogel-Piezoelectric Bilayer Thin Film for Wireless Biochemical Sensing

Sophia Selvarajan, Alba Lako, Albert Kim

J. Flex. Print. Electron. 2026;5(1):107-117.
https://doi.org/10.56767/jfpe.250020

We present a hydrogel–fractal piezoelectric bilayer transducer for wireless biochemical sensing. The device combines a pH-responsive chemomechanical hydrogel with a perforated piezoelectric membrane to enable deformation-mediated signal transduction. The proposed scheme utilizes the piezoelectric element as a wireless transducer and the swelling/shrinking of hydrogels as a sensing element. Fractal patterning of the piezoelectric layer increases mechanical compliance and supports multi-mode vibration, resulting in improved bandwidth and linear...
RESEARCH

Jun 30, 2026

Direct Ink Writing–Based Fabrication and Evaluation of Customized High-Density Surface Electromyography Electrode Arrays for Hand Gesture Classification
직접 잉크 쓰기 기반 맞춤형 고밀도 표면근전도 전극 배열 제작 및 손동작 분류 성능 평가

Ui-In Lee, Taeha Kim, Hyeju Roh, Junghun Sung, Woongki Hong, Hongki Kang
이의인, 김태하, 노혜주, 성정훈, 홍웅기, 강홍기

J. Flex. Print. Electron. 2026;5(1):119-134.
https://doi.org/10.56767/jfpe.250025
RESEARCH

Jun 30, 2026

Localized Black Polyimide Absorbers for Low-Reflectance Ag

Ji-Sub Park, Jun-Young Jeon, Hak-Rin Kim, Jun-Chan Choi

J. Flex. Print. Electron. 2026;5(1):135-143.
https://doi.org/10.56767/jfpe.260003

Flexible transparent conducting electrodes based on metal mesh structures can achieve low sheet resistance but often exhibit visible reflection from the metallic lines. Here, we introduce a localized black polyimide (BPI) light absorption layer near the Ag mesh lines to reduce metal-induced reflection while preserving the essential electrode characteristics. The BPI layer, consisting of carbon-black-dispersed polyimide, was patterned by combining thermal imprinting with Ag nanoparticle ink filling, thermal treatment, and selective etching, ther...
RESEARCH

Jun 30, 2026

Low-voltage Operation Solution-Processed Thin Film Transistors with Various Dielectrics
게이트 절연막 제어를 통한 저전압 구동 용액공정 박막 트랜지스터 구현

Yongju Lee, Hyeok Kim
이용주, 김혁

J. Flex. Print. Electron. 2026;5(1):145-151.
https://doi.org/10.56767/jfpe.260007
RESEARCH

Jun 30, 2026

Effect of PR-Based Pixel-Defining Structures on the Angular Luminance Distribution of Small-Sized OLED Pixels
PDL 구조의 유무에 따른 소형 OLED 픽셀의 휘도 분포 분석

Seo-Yoon Bae, Hanna You, Sung-Min Lee
배서윤, 유한나, 이성민

J. Flex. Print. Electron. 2026;5(1):153-160.
https://doi.org/10.56767/jfpe.260008

CURRENT ISSUE: Jun 2026, Vol. 5, No. 1

REVIEW Mechanisms of Negative Capacitance in Organic Light-Emitting Diodes: A Review Byeongyun Kim, Donghyun Ko, Jaesang Lee J. Flex. Print. Electron. 2026;5(1):1-19. https://doi.org/10.56767/jfpe.250027 HTML PDF PubReader	REVIEW Quantum Dot Patterning Techniques for High-Resolution AR/VR Displays 초고해상도 AR/VR 디스플레이를 위한 양자점 패터닝 기술 Junhyeok Park, Soong Ju Oh 박준혁, 오승주 J. Flex. Print. Electron. 2026;5(1):21-33. https://doi.org/10.56767/jfpe.250024 HTML PDF PubReader
REVIEW Recent Advances in Soft Electromagnetic Devices for Wearable Applications 웨어러블 응용을 위한 소프트전자기파 소자 기술 동향 Hoon Yeub Jeong 정훈엽 J. Flex. Print. Electron. 2026;5(1):35-50. https://doi.org/10.56767/jfpe.260004 HTML PDF PubReader	REVIEW Recent Advances in AI-Driven Inkjet Printing Seongju Kim J. Flex. Print. Electron. 2026;5(1):51-67. https://doi.org/10.56767/jfpe.260005 HTML PDF PubReader
REVIEW Printed Graphene-Based Interconnects and Vias for Flexible Hybrid Electronics Ganapathi Bharathi, Seongin Hong J. Flex. Print. Electron. 2026;5(1):69-106. https://doi.org/10.56767/jfpe.260006 HTML PDF PubReader	RESEARCH Hydrogel-Piezoelectric Bilayer Thin Film for Wireless Biochemical Sensing Sophia Selvarajan, Alba Lako, Albert Kim J. Flex. Print. Electron. 2026;5(1):107-117. https://doi.org/10.56767/jfpe.250020 HTML PDF PubReader
RESEARCH Direct Ink Writing–Based Fabrication and Evaluation of Customized High-Density Surface Electromyography Electrode Arrays for Hand Gesture Classification 직접 잉크 쓰기 기반 맞춤형 고밀도 표면근전도 전극 배열 제작 및 손동작 분류 성능 평가 Ui-In Lee, Taeha Kim, Hyeju Roh, Junghun Sung, Woongki Hong, Hongki Kang 이의인, 김태하, 노혜주, 성정훈, 홍웅기, 강홍기 J. Flex. Print. Electron. 2026;5(1):119-134. https://doi.org/10.56767/jfpe.250025 HTML PDF PubReader	RESEARCH Localized Black Polyimide Absorbers for Low-Reflectance Ag Ji-Sub Park, Jun-Young Jeon, Hak-Rin Kim, Jun-Chan Choi J. Flex. Print. Electron. 2026;5(1):135-143. https://doi.org/10.56767/jfpe.260003 HTML PDF PubReader
RESEARCH Low-voltage Operation Solution-Processed Thin Film Transistors with Various Dielectrics 게이트 절연막 제어를 통한 저전압 구동 용액공정 박막 트랜지스터 구현 Yongju Lee, Hyeok Kim 이용주, 김혁 J. Flex. Print. Electron. 2026;5(1):145-151. https://doi.org/10.56767/jfpe.260007 HTML PDF PubReader	RESEARCH Effect of PR-Based Pixel-Defining Structures on the Angular Luminance Distribution of Small-Sized OLED Pixels PDL 구조의 유무에 따른 소형 OLED 픽셀의 휘도 분포 분석 Seo-Yoon Bae, Hanna You, Sung-Min Lee 배서윤, 유한나, 이성민 J. Flex. Print. Electron. 2026;5(1):153-160. https://doi.org/10.56767/jfpe.260008 HTML PDF PubReader

AHEAD OF PRINT

Review Article

Stretchable Organic Photodetectors: From Structural to Intrinsic Design

Hyunbum Kang

J. Flex. Print. Electron. 2026 [published online ahead of print: Jun 24, 2026]
https://doi.org/10.56767/jfpe.260001

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MOST READ ARTICLES

REVIEW Recent Progress on Skin-Compatible Flexible Photoplethysmography Sensor 유연 소자를 활용한 피부 부착형 광혈류 측정 센서의 최근 연구 동향 Jae-Hyun Kim, Jaebin Jeong, Hyung Kyu Lee, Doyeon Kim, Sungjun Park 김재현, 정재빈, 이형규, 김도연, 박성준 J. Flex. Print. Electron. 2024;3(2):163-178. https://doi.org/10.56767/jfpe.2024.3.2.163 HTML PDF PubReader Last 3 months views: 2392	RESEARCH Cation-Dependence in Electrochemical Dedoping of Heterogeneous Organic Mixed Ionic-Electronic Conductors Tae Hoon Kim, Youhyun Nam, Ji Hwan Kim, Myung Han Yoon, Keehoon Kang J. Flex. Print. Electron. 2024;3(1):95-101. https://doi.org/10.56767/jfpe.2024.3.1.95 HTML PDF PubReader Last 3 months views: 2357
REVIEW Recent Progress in Organic-Based Photonic Synapses Gyu-min Ko, Seungbeom Lee, Minjun Choi, Hea-Lim Park J. Flex. Print. Electron. 2022;1(2):155-173. https://doi.org/10.56767/jfpe.2022.1.2.155 HTML PDF PubReader Last 3 months views: 2089	REVIEW Display Application and Development Trend of Perovskite Emitters 페로브스카이트 발광체의 디스플레이 응용과 개발동향 Taejun Kim, Mun Hee Lee 김태준, 이문희 J. Flex. Print. Electron. 2022;1(1):13-28. https://doi.org/10.56767/jfpe.2022.1.1.13 HTML PDF PubReader Last 3 months views: 1956
REVIEW Flexible Organic Ferroelectric Synaptic Transistors for Wearable Neuromorphic Systems Jae-Yeong Cho, Chang-Jae Beak, Sin-Hyung Lee J. Flex. Print. Electron. 2024;3(1):65-83. https://doi.org/10.56767/jfpe.2024.3.1.65 HTML PDF PubReader Last 3 months views: 1898	REVIEW Recent Advancements in Flexible Biosensors for Continuous Glucose Monitoring Junghyun Cho, Yunyoung Jang, Jayoung Kim, In-Seon Lee, Wonryung Lee J. Flex. Print. Electron. 2024;3(1):47-64. https://doi.org/10.56767/jfpe.2024.3.1.47 HTML PDF PubReader Last 3 months views: 1671
REVIEW Geometrical Engineering for Implementing Stretchable Electronics 스트레처블 일렉트로닉스를 구현하기 위한 기하학적 엔지니어링 Seungkyu Lee, Jun Chang Yang, Steve Park 이승규, 양준창, 스티브 박 J. Flex. Print. Electron. 2022;1(2):125-136. https://doi.org/10.56767/jfpe.2022.1.2.125 HTML PDF PubReader Last 3 months views: 1643	REVIEW Recent Progress in Stretchable Artificial Synapses based on Organic Electrochemical Transistors 유기 전기화학 트랜지스터 기반 신축성 인공 시냅스의 최근 동향 Sangwoo Jung, Yeongjun Lee 정상우, 이영준 J. Flex. Print. Electron. 2025;4(1):55-72. https://doi.org/10.56767/jfpe.2025.4.1.55 HTML PDF PubReader Last 3 months views: 1544
RESEARCH Highly Bright and Efficient Flexible Quantum Dot Light-Emitting Diodes on Metal-Coated PEN Substrate Geun Woo Baek, Hansol Seo, Taesoo Lee, Donghyo Hahm, Wan Ki Bae, Jeonghun Kwak J. Flex. Print. Electron. 2023;2(2):243-251. https://doi.org/10.56767/jfpe.2023.2.2.243 HTML PDF PubReader Last 3 months views: 1419	REVIEW Advances in Stretchable Functional Materials for Soft Bioelectronics Ja Hoon Koo J. Flex. Print. Electron. 2024;3(2):179-194. https://doi.org/10.56767/jfpe.2024.3.2.179 HTML PDF PubReader Last 3 months views: 1366

MOST CITED ARTICLES

REVIEW Recent Progress in Printing Conductive Materials for Stretchable Electronics 신축성 전자소자를 위한 전도성 재료 인쇄의 최근 동향 Hyunsuk Jung, Wonbeom Lee, Jiheong Kang 정현석, 이원범, 강지형 J. Flex. Print. Electron. 2022;1(2):137-153. https://doi.org/10.56767/jfpe.2022.1.2.137 HTML PDF PubReader Cited by 10	REVIEW Geometrical Engineering for Implementing Stretchable Electronics 스트레처블 일렉트로닉스를 구현하기 위한 기하학적 엔지니어링 Seungkyu Lee, Jun Chang Yang, Steve Park 이승규, 양준창, 스티브 박 J. Flex. Print. Electron. 2022;1(2):125-136. https://doi.org/10.56767/jfpe.2022.1.2.125 HTML PDF PubReader Cited by 9
REVIEW Recent Progress in Organic-Based Photonic Synapses Gyu-min Ko, Seungbeom Lee, Minjun Choi, Hea-Lim Park J. Flex. Print. Electron. 2022;1(2):155-173. https://doi.org/10.56767/jfpe.2022.1.2.155 HTML PDF PubReader Cited by 7	REVIEW 3D Integration of Flexible and Printed Electronics: Integrated Circuits, Memories, and Sensors 3차원 집적 유연 인쇄 전자: 집적 회로, 메모리, 센서 Woojo Kim, Jimin Kwon, Sungjune Jung 김우조, 권지민, 정성준 J. Flex. Print. Electron. 2023;2(2):199-210. https://doi.org/10.56767/jfpe.2023.2.2.199 HTML PDF PubReader Cited by 6
RESEARCH Development of Highly Conductive Cu Conductors Using Cu Nanoparticle/Flake Inks and Instantaneous Laser Sintering Process 구리 나노입자/플레이크 잉크 및 레이저 공정을 이용한 고전도성 전극 제조 Yejin Jo, Sunho Jeong 조예진, 정선호 J. Flex. Print. Electron. 2022;1(1):119-124. https://doi.org/10.56767/jfpe.2022.1.1.119 HTML PDF PubReader Cited by 4	REVIEW User-Interactive Display Integrating Stimuli-Detecting Sensors and Visualizing Displays 자극을 감지하는 센서와 신호를 시각화하는 디스플레이가 통합된 사용자 상호적 디스플레이 Yaewon Kim, Moon Kee Choi 김예원, 최문기 J. Flex. Print. Electron. 2022;1(2):175-188. https://doi.org/10.56767/jfpe.2022.1.2.175 HTML PDF PubReader Cited by 4
REVIEW Fabrication of Flexible Printed Electronic Using Selective Laser Sintering 선택적 레이저 소결을 이용한 유연인쇄전자소자 제작 Sang J. Yoon, JinKi Min, Seung Hwan Ko 윤상진, 민진기, 고승환 J. Flex. Print. Electron. 2022;1(2):189-199. https://doi.org/10.56767/jfpe.2022.1.2.189 HTML PDF PubReader Cited by 4	RESEARCH Cation-Dependence in Electrochemical Dedoping of Heterogeneous Organic Mixed Ionic-Electronic Conductors Tae Hoon Kim, Youhyun Nam, Ji Hwan Kim, Myung Han Yoon, Keehoon Kang J. Flex. Print. Electron. 2024;3(1):95-101. https://doi.org/10.56767/jfpe.2024.3.1.95 HTML PDF PubReader Cited by 4
REVIEW Vertical 3-Terminal Artificial Synaptic Devices 수직구조 3단자 인공 시냅스 소자 Nahyun Jeong, Kyung-Geun Lim 정나현, 임경근 J. Flex. Print. Electron. 2023;2(1):1-13. https://doi.org/10.56767/jfpe.2023.2.1.1 HTML PDF PubReader Cited by 3	REVIEW Recent Progress in Two-Terminal Memristors Utilizing Halide Perovskites and Their Potential Applications 할라이드 페로브스카이트 2단자 멤리스터의 최근 연구 동향 Young Ran Park, Gunuk Wang 박영란, 왕건욱 J. Flex. Print. Electron. 2023;2(2):161-185. https://doi.org/10.56767/jfpe.2023.2.2.161 HTML PDF PubReader Cited by 3