Data di Pubblicazione:
2007
Abstract:
Interest in thin films of PZT lead zirconium titanate PbZr0.47Ti0.53O3 has increased because of their
potential applications. For instance, the insertion of PZT in asymmetric nematic liquid crystal cells
induces a rectified electro-optical response similar to that observed in such cells because of the
insertion of metal oxide layers with ionic conductivity. In the present work several PZT films have
been investigated, obtained by different thermal treatments after sol-gel synthesis and spin coating
deposition. The observed rectifying effect, due to the insertion of PZT films in asymmetric liquid
crystal cells, has been attributed to the presence of an internal field made from the reorientation of
nanodomains of PZT. The presence of such internal fields is demonstrated and an estimation of it is
given. Moreover, asymmetric nematic liquid crystal cells made with PZT films show considerable
improvements in both contrast and response time.
potential applications. For instance, the insertion of PZT in asymmetric nematic liquid crystal cells
induces a rectified electro-optical response similar to that observed in such cells because of the
insertion of metal oxide layers with ionic conductivity. In the present work several PZT films have
been investigated, obtained by different thermal treatments after sol-gel synthesis and spin coating
deposition. The observed rectifying effect, due to the insertion of PZT films in asymmetric liquid
crystal cells, has been attributed to the presence of an internal field made from the reorientation of
nanodomains of PZT. The presence of such internal fields is demonstrated and an estimation of it is
given. Moreover, asymmetric nematic liquid crystal cells made with PZT films show considerable
improvements in both contrast and response time.
Tipologia CRIS:
01.01 Articolo in rivista
Elenco autori:
Scaramuzza, Nicola
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