Research Groups

'Advanced fleXible Electronics Laboratory (AXEL)' was established in 2006 and our lab members have been studying next-generation flexible/stretchable devices and electronic circuit applications using them. Next-generation flexible/stretchable devices include not only conventional silicon-based semiconductor devices but also organic semiconductor devices that are spotlighted as next-generation display devices and oxide semiconductor devices which are evaluated as main technologies for realizing transparent displays. We are interested in developing flexible/stretchable devices and circuits, and analyzing device operation principles. The manufacturing method utilizes technologies such as solution-based inkjet and screen printing processes capable of large-area, mass-production, and low-cost production. The ultimate goal of our research is to develop flexible/stretchable display devices, robust electronic skin and energy-harvesting electronics.

<과제 수행 연구 협력 기관>
- 산업통상자원부, 과학기술정보통신부, 한국연구재단, 서울대학교
- 삼성전자, LG디스플레이, 삼성디스플레이, 삼성전자 종합기술원, 삼성리서치, SMD솔루션
- 한국과학기술연구원, 한국전자기술연구원, 한국전자통신연구원, 한국생산기술연구원

<수행 중 연구 과제>
1. 근전도, 관성, 스트레인 센서 융합 전자피부 기반 근기능 관리 솔루션 개발
2. 폴더블 디스플레이 주름 개선 기술 개발
3. 초고해상도 초고민감 3차원 압력 센서 시트 개발
4. 차세대 헬스케어용 연신 센서 플랫폼 개발
5. 다차원 변형률 제어된 발광소자 및 구동 소자의 구현을 통한 고신뢰 신축성 디스플레이 개발
6. 스트레처블 패널의 백플레인용 50% 연신 가능한 기판 전극 및 모듈화 장비 기술 개발
7. 인쇄 공정용 이동도 0.001cm2/Vs 급 유/무기 전하 주입/수송층 잉크소재 기술 개발
8. 차세대 웨어러블 디바이스용 유연 광범위 압력 터치 센서 어레이 개발

1. S. Lee, S. Lee, H. Yoon, C.-K. Lee, C. Yoo, J. Park, J. Byun, G. Kim, B. Lee, B. Lee, and Y. Hong, “Printed cylindrical lens pair for application to the seam concealment in tiled display”, Optics Express, 26, 824 (2018)

2. T.-Y. Kim, J. Ha, K. Cho, J. Pak, J. Seo, J. Park, J.-K. Kim, S. Chung, Y. Hong, and T. Lee, “Transparent Large-Area MoS2 Phototransistors with Inkjet-Printed Components on Flexible Platforms”, ACS Nano, 11, 10273 (2017)

3. J. Byun, B. Lee, E. Oh, H. Kim, S. Kim, S. Lee, and Y. Hong, “Fully printable, strain-engineered electronic wrap for customizable soft electronics”, Scientific Reports, 7, 45328 (2017)

4. E. Oh, J. Byun, B. Lee, S. Kim, D. Kim, J. Yoon, and Y. Hong, “Modulus-gradient Conductive Core-shell Structures Formed by Magnetic Self-assembling and Printing Processes for Highly Stretchable Via Applications”, Advanced Electronic Materials, 3, 1600517 (2017)

5. Y. Joo, J. Byun, N. Seong, J. Ha, H. Kim, S. Kim, T. Kim, H. Im, D. Kim, Y. Hong, “Silver Nanowire-embedded PDMS with Multiscale Structure for Highly Sensitive and Robust Flexible Pressure Sensor”, Nanoscale, 7, 6208 (2015)

6. J. Ha, J. Park, J. Ha, D. Kim, S. Chung, C. Lee, Y. Hong, “Selectively Modulated Inkjet Printing of Highly Conductive and Transparent Foldable Polymer Electrodes for Flexible Polymer Light-Emitting Diode Applications”, Organic Electronics, 19, 147 (2015)

7. T. Kim, H. Song, J. Ha, S. Kim, D. Kim, S. Chung, Y. Hong, "Inkjet-Printed Stretchable Single-Walled Carbon Nanotube Electrodes with Excellent Mechanical Properties", Applied Physics Letters, 104, 113103 (2014)

8. S. Kim, J. Byun, S. Choi, D. Kim, T. Kim, S. Chung, Y. Hong, "Negatively Strain-Dependent Electrical Resistance of Magnetically Arranged Nickel Composites: Application to Highly Stretchable Electrodes and Stretchable Lighting Devices", Advanced Materials, 26, 3094 (2014)

9. S. Chung, M. Jang, S. -B. Ji, H. Im, N. Seong, J. Ha, S. -K. Kwon, Y. -H. Kim, H. Yang, Y. Hong, "Flexible High-Performance All-Inkjet-Printed Inverters: Organo-Compatible and Stable Interface Engineering", Advanced Materials, 25, 4772 (2013)

10. J. Lee, S. Chung, H. Song, S. Kim, and Y. Hong, "Lateral-crack-free, buckled, inkjet-printed silver electrodes on highly pre-stretched elastomeric substrates", Journal of Physics D: Applied Physics, 46, 105305 (2013)