Photocarrier generation processes of phthalocyanines studied by photocurrent and electroabsorption measurements

New near-IR active MgPc(H2O) polymorphic modification: Synthesis, structural investigation, thermal stability and spectroscopy

“…Thus the near-IR broad-band absorption is typical of the solid state and is closely related to the molecular arrangement -the ''face-to-face'' dimeric structure of [MgPc(H 2 O)] 2 with strong p-p interactions between the Pc rings. This hypothesis is supported also by the solid state spectra of titanyl and vanadyl phthalocyanines (OTiPc and OVPc) that crystallise in two or more crystalline forms, but only those with molecular arrangement similar to that in the present structure exhibit the IR-band broadening [36][37][38].…”

Ultrafast excitation relaxation in titanylphthalocyanine thin film

“…Absorption spectra of molecular-beamdeposited films were investigated by Yamashita et al [11]. Electroabsorption measurements performed by Saito et al [12] revealed the charge transfer character of the near infrared absorption band of phase II and Y-form TiOPc. Dynamics of the charge carrier photogeneration in Y-form TiOPc was investigated by Popovic et al [13].…”

Axially substituted titanium(IV) phthalocyanines

“…The reasons for the high photoconductivity of PcTiO and its relationship [5] to the crystal structure still remain under debate. It was pointed out that the photocarrier generation efficiency of PcTiO and related compounds depends on the central metal atom and the crystal structure [6,7]. The advantage of peripheral substitution in PcTiO is the resulting high solubility in organic solvents which allows purification by column chromatography and preparation of thin films by spin coating.…”