Quasi‐Amorphous Colloidal Structures for Electrically Tunable Full‐Color Photonic Pixels with Angle‐Independency

Similar to other PBG materials prepared by self-assembly of block copolymers or by lithographic techniques, colloidal photonic crystals require crystalline or highly ordered periodic structures to exhibit PBG by the collective refraction in longrange. [ 9–11 ] In this case, the PBG can be tuned by modulation of periodicity or/and refractive index contrast. [ 9 , 12 ] While such tunable photonic crystals based on crystalline structures have recently been proposed as active components of display [ 13–16 ]

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