Enhanced Mechanical and Thermal Resistances of Nanoimprinted Antireflective Moth‐Eye Surfaces Based on Poly Vinylidene Fluoride/TiO₂ Surface Nanocomposites

Abstract

Herein, the fabrication of bioinspired moth‐eye antireflective (AR) films based on surface nanocomposites of poly vinylidene fluoride (PVDF) and TiO2 nanoparticles produced in a single thermal nanoimprint lithography step is described. The incorporation of nanoparticles enhances the mechanical and thermal stability of the AR topography as demonstrated by nanoindentation tests and in situ temperature‐dependent grazing incidence X‐ray scattering measurements using synchrotron radiation. The effect of thermal annealing and UV radiation on the degradation in the optical performance and durability of the AR films is also evaluated in weathering tests. Improving the thermal and mechanical behavior as well as the long‐term durability of nanoimprinted polymer AR films will significantly expand their potential for implementation in solar devices.

Exploiting the Optical Limits of Thin‐Film Solar Cells: A Review on Light Management Strategies in Cu(In,Ga)Se2

“…Various techniques have been used to fabricate periodic nanoscale arrays, such as electron beam, [ 165 ] nanoimprint, [ 166 ] colloidal, [ 167 ] and interference lithography processes. [ 168 ] Burghoorn et al patterned a moth‐eye architecture with an average height and pitch of 350 and 300 nm, respectively, on a resist layer on top of thin‐film CIGS solar cell devices.…”

Surface Adaptable and Adhesion Controllable Dry Adhesive with Shape Memory Polymer

“…Many living creatures in nature have a special own surviving method, and many studies of bio‐mimicking have been widely conducted to apply their novel living methods in our life. [ 1–6 ] One of the most famous studies in the biomimetics is a dry adhesive inspired by gecko foot. The gecko foot consists of numerous micro/nano hierarchical hair, which is composed of 30–130 µm long setae and 0.2–0.5 µm spatula‐shaped terminating structures and can be strongly attached to the surface by the “van der Waals forces.” [ 7–11 ] Notably, although the gecko lizards can stick with an adhesion strength of more than 100 kPa, they can move in speeds as high as 0.8 m s −1 through their extraordinary adhesion switching capability.…”