In this study, we successfully fabricated highly stable and transparent gold (Au) metal mesh electrodes via an electrohydrodynamic (EHD) jet printing process for transparent display applications. To overcome the structural fragility and high sheet resistance of conventional indium tin oxide (ITO) electrodes, a low-cost, solution-processed EHD printing approach was introduced to form ultra-fine Au grid lines under ambient conditions. The geometrical dimensions of the mesh structure, particularly the grid pitch, were systematically optimized to investigate the trade-off relationship between optical transmittance and electrical sheet resistance. The optimized Au metal mesh electrode, featuring a line width of 3 ㎛ and a grid pitch of 200 ㎛, exhibited a low sheet resistance of 5.1 Ω/sq and a high visible-light transmittance of 86.2% at 550 ㎚, yielding an outstanding figure of merit (FoM). Furthermore, by incorporating a 15-degree tilted grid design relative to the underlying pixel display array, the critical optical issue of Moire interference fringes was completely eliminated, securing excellent invisibility. Long-term environmental reliability tests conducted under harsh conditions (85°C and 85% relative humidity) demonstrated that the printed Au mesh maintained its initial resistance with a variation of less than 3% after 200 hours, whereas conventional silver nanowire electrodes suffered severe degradation. These results indicate that the EHD-printed Au metal mesh transparent electrode holds great potential as a robust and high-performance alternative to ITO for next-generation large-area transparent and flexible optoelectronic devices.

Abstract
1. 서 론
2. 연구방법
    2.1 기판준비 및 전처리
    2.2 전기유체역학(EHD) 인쇄를 통한 Au 격자 형성
    2.3 열처리 및 특성 분석
3. 연구결과
    3.1 메쉬 구조에 따른 광학 및 전기적 성능 지수평가
    3.2 디스플레이 시인성 및 모아레 간섭 무늬 제어
    3.3 고온고습 환경 하에서의 장기 화학적 신뢰성
4. 결 론
후 기
References

• 최민주(PLT Co., LTD) | M. J. Choi
• 이민상(PLT Co., LTD) | M. S. Lee
• 김제오(PLT Co., LTD) | J. O. Kim
• 원대희(Wonkwang University, Division of Liberal Art, Associate Professor) | D. H. Won Corresponding author