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Ice‐Templated, Large‐Area Silver Nanowire Pattern for Flexible Transparent Electrode
Author(s) -
Han Jingkai,
Yang Jiankui,
Gao Weiwei,
Bai Hao
Publication year - 2021
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202010155
Subject(s) - materials science , electrode , sheet resistance , transmittance , optoelectronics , nanotechnology , nanomaterials , flexible electronics , nanowire , bending , electronics , stretchable electronics , composite material , layer (electronics) , chemistry
Flexible transparent electrodes are critically important for the emerging flexible and stretchable electronic and optoelectronic devices. To this end, transparent polymer films coated with silver nanowires (AgNWs) have been intensively studied in the past decade. However, it remains a grand challenge to achieve both high conductivity and transmittance in large‐area films, mainly due to the poor alignment of AgNWs and their high junction resistance. Here, the successful attempt to realize large‐area AgNW patterns on various substrates by a 2D ice‐templating approach is reported. With a relatively low dosage of AgNWs (4 µg·cm −2 ), the resulted flexible electrode simultaneously achieves high optical transmittance (≈91%) and low sheet resistance (20 Ω·sq −1 ). In addition, the electrode exhibits excellent durability during cyclic bending (≈10 000 times) and stretching (50% strain). The potential applications of the flexible transparent electrode in both touch screen and electronic skin sensor, which can monitor the sliding pressure and direction in real‐time, are demonstrated. More importantly, it is believed that the study represents a facile and low‐cost approach to assemble various nanomaterials into large‐area functional patterns for advanced flexible devices.