Crystal phase and thermal transformation of oxotitanium phthalocyanines.

An excellent single-layered photoreceptor composed of oxotitanium phthalocyanine nanoparticles and an insulating resin

“…0.30 nm is shown in the HRTEM image (Fig. 1c), which is in agreement with the lattice spacing between the neighboring (212) planes of phase-II-TiOPc [34].…”

“…2. Both of them give diffraction peaks at Bragg angle (2θ ) of 7.6, 10.3, 13.3, 22.6, 25.5 and 28.7, which indicate that they are in the same crystal form of phase II [34]. Obviously, the peaks of N-TiOPc are significantly broadened compared with those of B-TiOPc.…”

Solvent‐Stabilized Photoconductive Metal Phthalocyanine Nanoparticles: Preparation and Application in Single‐Layered Photoreceptors

“…X-ray power diffraction (XRD) patterns showed that N-VOPc and N-TiOPc were in the crystal form of phase-II. [18,19] It was found that N-VOPc and N-TiOPc in the powders prepared by such a method could be well dispersed by ultrasonication in some organic solvents such as 1,2-dichloroethane (DCE) in the absence of any other protective agent. [13,14] The obtained N-VOPc/DCE and N-TiOPc/DCE colloidal solutions were very stable, and they could stand for at least three months without any precipitation.…”

A highly sensitive near-infrared organic photodetector based on oxotitanium phthalocyanine nanocrystals and light-induced enhancement of electron tunnelling

“…21 Among various phthalocyanine semiconductors, oxotitanium phthalocyanine in the crystal form of phase-Y (Y-TiOPc) has attracted particular attention due to its high photosensitivity to NIR light, with a charge carrier photogeneration quantum efficiency higher than 90% in high electric fields. 22,23 Previously, we reported Y-TiOPc nanoparticles (Y-TiOPc NPs) with an average particle size of 3.4 nm, which were prepared through a colloidal-solutionmediated phase transition process, and single-layered photoreceptors for xerography prepared by homogeneously dispersing 20% of the Y-TiOPc NPs in an insulating polycarbonate resin PCZ-300 (abbreviated Y-TiOPc@PC). Such a photoreceptor simultaneously exhibited high charge durability in the dark and high photosensitivity, which could not be realized by a single layer of traditional materials.…”