@article{Qin2025, 
author = {Yue Qin and Jinzhou Jiang and Pengkang Ye and Xunxun Xiang and Xu Wang and Yuehua Chen and Baoxiu Mi and Wenyong Lai and Xinwen Zhang},
title = {Direct-write ultrathin Ag-mesh transparent electrodes by the Chinese brush for high-performance stretchable OLEDs},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {8},
pages = {94907582},
keywords = {direct writing, flexible electrodes, organic light-emitting diodes, metal mesh, printing technique},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907582},
doi = {10.26599/NR.2025.94907582},
abstract = {Flexible optoelectronic devices play a crucial role in the field of wearable electronics. However, their potential and development have been hindered by the lack of high-performance, durable, and flexible transparent electrodes. Here, we developed ultrathin Ag mesh electrodes using a direct writing technique by a Chinese brush. Through precise control over the writing process, the printed Ag mesh with an ultrathin thickness of ~ 100 nm and a high width resolution of ~ 20 μm was achieved. The resulted composite electrodes of Norland Optical Adhesive 63 (NOA63)/Ag mesh/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) possess a low sheet resistance of ~ 12 Ω/sq and a high transmittance of ~ 91%. Benefiting from the ultrathin Ag mesh and embedded structure, the composite electrode shows the quite low surface roughness (~ 0.9 nm), along with exceptional mechanical flexibility with a micrometer-scale bending radius. Furthermore, stretchable organic light-emitting devices (OLEDs) based on this composite electrode present an impressive current efficiency of 88.6 cd/A. Significantly, the OLEDs remain 86% initial current efficiency over 1000 bending cycles and maintain 88% initial luminance at the 50% strain. Interestingly, this direct writing technique possesses the remarkable capability to print transparent electrodes on curved or uneven substrate surfaces, expanding its potential for universal applications. This work presents a straightforward and general printing method for constructing high-performance flexible transparent electrodes for various flexible electronics.}
}