Scalable fabrication of flexible transparent heaters comprising continuously created metallic micromesh patterns incorporated with biomimetic anti-reflection layers
- 178 Downloads
We present the scalable fabrication of a novel transparent heater (TH) architecture by continuously creating metallic micromesh patterns on a flexible substrate via Photo Roll Lithography (PRL). The optimal TH structure is explored by systematically investigating the heating and transmittance characteristics depending on the metal material, thickness, and micromesh dimension. The transmittance is further enhanced by incorporating the biomimetic moth-eye anti-reflection layer (ARC) which effectively reduces the reflection along with diffraction and scattering of incident light. The fabricated ARC-integrated TH exhibits an excellent transmittance with satisfactory heating up to 47.5oC at the applied current of 0.6 A, which demonstrates ten times more power-efficient than conventional macroscale wire defrosters used in most vehicles. Successful defrosting of both planar and curved large-area surfaces is visually demonstrated by attaching the 70 × 70 mm-sized THs fabricated on a glass or flexible polymer. This versatile, highthroughput TH architecturing may be applicable to many other devices requiring flexibility, scalability, and power-efficient operation, and their commercially-feasible production.
KeywordsFlexible heater Transparent heater Anti-reflection Continuous process Roll photolithography
Unable to display preview. Download preview PDF.
- 4.Yamaguchi, K., Obata, M., and Ogawa, M., “Heat Pump Including Auxiliary Outdoor Heat Exchanger Acting as Defroster and Sub-Cooler,” US Patent, 4171622 A, 1979.Google Scholar
- 5.Han, S. Y., Hong, S. J., Yeo, J. Y., Kim, D. K., Kang, B. C., et al., “Nanorecycling: Monolithic Integration of Copper and Copper Oxide Nanowire Network Electrode through Selective Reversible Photothermochemical Reduction,” Advanced Materials, Vol. 27, No. 41, pp. 6397–6403, 2015.CrossRefGoogle Scholar
- 8.Kwak, M. K., Ok, J. G., Lee, J. Y., and Guo, L. J. “Continuous Phase-Shift Lithography with a Roll-Type Mask and Application to Transparent Conductor Fabrication,” Nanotechnology, Vol. 23, No. 34, Paper No. 344008, 2012.Google Scholar
- 13.Suh, Y. D., Hong, S. J., Kim, G. H., Hwang, K. I., Choi, J. H., et al., “Selective Electro-Thermal Growth of Zinc Oxide Nanowire on Photolithographically Patterned Electrode for Microsensor Applications,” Int. J. Precis. Eng. Manuf.-Green Tech., Vol. 3, No. 2, pp. 173–177, 2016.CrossRefGoogle Scholar
- 20.Wilson, S. and Hutley, M., “The Optical Properties of ‘Moth Eye’antireflection Surfaces,” Journal of Modern Optics, Vol. 29, No. 7, pp. 993–1009, 1982.Google Scholar