Fabrication of Anti-reflection film with sub-wavelength structures using roll-to-roll imprinting

• Main Authors: Po-Hsiang Wang, 王柏翔
• Other Authors: Deng-Maw Lu
• Format: Others
• Language: zh-TW
• Published: 104
• Online Access: http://ndltd.ncl.edu.tw/handle/qyzm88

碩士 === 南臺科技大學 === 機械工程系 === 103 === This study presents a low-cost method to fabricate a Roller anti-reflection (AR) layer with sub-wavelength structures (SWSs) on PET substrate based on Roll-to-Roll (R2R) nanoimprinting lithography with anodic alumina oxide (AAO) template. The multi-step anodization and widening process were employed to produce the saddle-shape structures for easy replication and less demolding issues. In our experiments, the rectangle AAO template can be extended to Roller with excellent uniformity and the Aspect ratio of nanopores array ranged about 1:2.5 ~ 1:3.8 by adjusting the anodization duration and widening time. Then, the UV curable resin SWSs on the PET substrate were replicated by R2R with different aspect ratio AAO Roller. In the optical measurement, the transmittance of SWSs layer is increased up to 93% and their reflectivity can be reduced from 5.3% to 0.14% in the range of visible light, a antireflective surface was be achieved. In addition, addotopma; antireflection layer on the surface of a solar cell, the total conversion efficiency of solar cell was changed from 9.25% to 10.43%. According to these characterization results of SWSs layer, we have demonstrated a feasible method for fabricating a large-area template with nanopores array. Therefore, this enabling technology could be further implemented to LCD display and solar cell due to its excellent anti-reflection and self-cleaning effects.