Improvement on the photorefractive performance by the insertion of a SiO₂blocking layer

Avenues for Expanded Applicability in Photorefractive Based Holographic 3-D Displays

“…C 60 has shown promise already in four-wave mixing [8] and preliminary display setups, though the sensitivity of PR polymers is still below that of chemical emulsions. Some novel techniques, such as quantum dots [10], buffer layers [11], and thermal fixing may be they key.…”

Photorefractive Organic Materials and Applications

“…This prevents the further application of any voltage and renders the device inoperative. To prevent this discharge Lv et al used a thin SiO 2 blocking layer between the electrodes and the polymer, and observed an improvement of the photorefractive figures of merit [132]. Wang et al proposed to use sol-gel buffer layers [133], and Christenson et al used amorphous polycarbonate to offer the same kind of protection [134].…”

“…50 V/μm and energetic disorder up to ca. 0.25 eV), this volumetric description typically fails to describe systems with lower dimensionality [131,132] or systems where charge transport is highly inhomogeneous across a device such as in bulk-heterojunction OPV.…”

Organic Photorefractive Materials and Applications

“…In Ref. [233], an additional 10 nm SiO 2 -blocking layer was introduced between PR-material and ITO-coating to lower dark-and photocurrent-fl ow through the sample. The melt-pressing procedure is generally limited to materials with a suitable viscosity for preparation at temperatures below sublimation of some of the components or thermal damage.…”