Charge Carrier Transport Properties of Organopolysilanes and Their Application to Xerographic Photoreceptor

Abstract

Aiming application of the high hole drift mobility in organopolysilanes, the organopolysilane-based organic layered photoreceptors for electrophotography have been developed with phthalocyanine pigments as a photo-generating material. The photoreceptor combined with titanylphthalocyanine exhibited the high sensitivity of 1.8 cm2 (μJ)−1 at 780 nm and fairly good stability, suggesting the possibility for practical use of organopolysilanes.

Photoconductive properties of polysilane copolymers with pendant siloxane groups

“…Figure 3 shows the dependence of the square root of the electric field on the hole drift mobility for PS/SiO͑5͒, PS/SiO͑10͒, and PMPS. From this figure, it was found that the hole drift mobility of PMPS as a photoinjected charge carrier was near 10 Ϫ4 cm 2 V Ϫ1 s Ϫ1 at an electric field of 2ϫ10 5 V cm Ϫ1 , as cited in the literature, [1][2][3][4][5] and it increased with the square root of the electric field. Generally, PS/SiO͑5͒ and PS/SiO͑10͒ exhibited slightly lower hole drift mobility than PMPS in the electric field range of 1ϫ10 5 -7ϫ10 5 V cm Ϫ1 , depending on the pentamethyldisiloxanylpropylphenylsilane fraction in the copolysilanes.…”

“…A typical application of this phenomenon centers on organic polymeric electrophotographic receptors that have flexibility and mechanical toughness, utilizing its high hole drift mobility. [1][2][3][4][5][6] However, photo-oxidation during irradiation with ultraviolet light in air to produce the siloxane structure is also known to be a characteristic of organic polysilanes. 7 Polysilanes are generally sensitive to oxygen even in the dark without any other corrosive substances such as corona effluents to induce Si-Si scission or siloxane formation.…”

Mesomorphic flexible chain polymers based on silicon

“…This enables polysilylenes to show remarkable properties such as UV absorption, photoconductivity and thermochromism [2], in which case the polymer backbone acts both as a one-dimensional semiconductor and as a chromophore. Potential applications in the fields of electrophotography [5], data storage [6] and non-linear optics have resulted in increasing interest in these materials.…”

Electrochemical properties and estimation of HOMO and LUMO levels of permethylated oligosilanes with well-defined structures

“…Polysilanes have been widely investigated from the interests on unique thermal [1 -3], optical [4 -6], electrochemical [7 -10] and electrical [11][12][13][14] properties originated from the delocalization of ¾ -electrons along the silicon backbone (see Refs [15,16] and references therein). Moreover, they can be applied to photo-and electroactive materials, such as photoresist [17], non-linear optical [18], photoluminescent [19] and electroluminescent [20] materials, which makes polysilanes interesting materials to be studied from both fundamental and industrial view points.…”