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Abstract
Inspired by the porous scale of the bright white beetle Cyphochilus, a polymerization-induced phase separation method is proposed to fabricate bioinspired high-scattering polymer films with porous structures. With an optimized formulation, the porous films with a mean pore size of ${\sim}{200}\; {\rm nm}$ feature a broadband reflectance of ${\sim}{71}\%$ at a thickness of 16 µm and are measured to have a transport mean free path of ${\sim}{3}\;\unicode{x00B5}{\rm m}$. The porous films with high reflectivity enable the application on light-emitting diodes and have great potential in other similar optoelectronic fields.
© 2020 Optical Society of America
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