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Issue 33, 2009
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Electrically tunable block copolymer photonic crystals with a full color display

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Abstract

Electrically tunable full color display photonic crystals (PCs) made of a thin film of block copolymer, polystyrene-b-poly(2-vinyl pyridine) (PS-b-P2VP), have been developed. The phase separation of PS and P2VP blocks leads to a one-dimensional periodic lamellar structure parallel to the surface of the thin film. In a solvent mixture of water and ethanol, each P2VP layer is swollen and partially charged. Applying a low voltage (<2.5 V) to such a thin film can lead to the repeatable expansion or contraction of each P2VP layer, depending on the direction and strength of the electrical potential. Such a variation of the lamellar periodicity leads to a full color display over a wide range from ultraviolet to near infrared. The advantages of such PCs are their facile preparation, low driving voltage and good durability, which make them potentially useful in information technologies.

Graphical abstract: Electrically tunable block copolymer photonic crystals with a full color display

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Publication details

The article was received on 23 Mar 2009, accepted on 03 Jun 2009 and first published on 30 Jun 2009


Article type: Paper
DOI: 10.1039/B905760A
J. Mater. Chem., 2009,19, 5952-5955

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    Electrically tunable block copolymer photonic crystals with a full color display

    Y. Lu, H. Xia, G. Zhang and C. Wu, J. Mater. Chem., 2009, 19, 5952
    DOI: 10.1039/B905760A

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