Electronics that stretch, sense and live on skin

We synthesize highly conductive, stretchable PEDOT:PSS and low-hysteresis conductive hydrogels, and build wearable sensors that recognize human motion with machine learning.

국립부경대학교 전기공학부 디스플레이반도체공학전공 김용현 교수 연구실

What we work on now

Synthesis of highly conductive, stretchable PEDOT:PSS

Lab-synthesized PEDOT:PSS with high conductivity that keeps working under large strain, plus elastomer surface engineering so the films stay attached when stretched.

Conductive hydrogels with low electrical hysteresis

Soft, skin-mimicking hydrogels from gelatin, alginate, PVA and cellulose whose resistance follows strain without lag, for reliable sensing and hydrovoltaic power.

Wearable sensors with machine-learning motion recognition

Skin-attachable strain and pressure sensors read out wirelessly, with machine learning that classifies body motion and gesture patterns from the sensor signals.

Earlier work: transparent alternative electrodes, doped nanoparticle interlayers, and light extraction for OLEDs and organic solar cells.

Selected publications

A. F. Wibowo1, N. A. Sasongko1, A. Puspitasari, T. T. Vo, S. A. N. Entifar, Y. S. Sembiring, J. H. Kim, M. J. Azizi, M. N. Slamet, J. Oh, J. -S. Park, S. Kim, D. C. Lim, M. -W. Moon, M. -S. Kim, M. Park*, and Y. H. Kim*, "Exceptionally low electrical hysteresis, soft, skin-mimicking gelatin-based conductive hydrogels for machine learning-assisted wireless wearable sensors", Chemical Engineering Journal, 526 (2025) 170741.

N. A. E. Entifar, G. W. Kim, S. A. N. Entifar, J. Oh, J. Lee, D. C. Lim, S. Kim, M. -S. Kim, and Y. H. Kim*, "High-performance PVA/xanthan gum hydrogel via dual cross-linking with ionic treatment for wearable sensing and hydrovoltaic energy generation", Chemical Engineering Journal, 520 (2025) 165637.

S. A. N. Entifar, N. A. E. Entifar, A. F. Wibowo, J. H. Kim, Y. S. br Sembiring, J. M. W. Saputro, H. -G. Kim, J. -O. Kim, G. Xie, J. Oh, S. Kim, D. C. Lim, M. -W. Moon, M. -S. Kim*, and Y. H. Kim*, "Extremely-low electrical-hysteresis hydrogels for multifunctional wearable sensors and osmotic power generators", Chemical Engineering Journal, 509 (2025) 160971.

Y. H. Kim*, C. Sachse, M. L. Machala, C. May, L. Müller-Meskamp*, and K. Leo, "Highly Conductive PEDOT:PSS Electrode with Optimized Solvent and Thermal Post-Treatment for ITO-Free Organic Solar Cells", Advanced Functional Materials, 21 (2011) 1076. (IF: 19.924) (Selected as an inside cover picture article, Cited > 1900 times) (One of the most accessed papers in Advanced Functional Materials, 2014) (Most cited paper top 3 in Advanced Functional Materials, 2014)