Method of making .alpha.-silicon powder, and electrophotographic

Details Method of making .alpha.-silicon powder, and electrophotographic Method of making .alpha.-silicon powder, and electrophotographic

1980-06-16

1982-10-26

Martin, Jr., Roland E.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Process of making radiation-sensitive composition

430 58, 430 84, 430 95, 430 96, 204192P, 2525011, 427 39, 427 74, G03G 5082

Patent

active

043562469

ABSTRACT:
A noncrystalline silicon powder having excellent photoconductivity is described, comprising silicon and hydrogen, exhibiting an infrared absorption spectrum characterized by absorption peaks centered at about 2000 cm.sup.-1 and 630 cm.sup.-1, wherein the height of the absorbance peak at 2000 cm.sup.-1 is at least one-tenth the height of the peak centered at 630 cm.sup.-1, and exhibiting a spin density of not more than 10.sup.18 cm.sup.-3 determined by electron spin resonance spectroscopy; the noncrystalline silicon powder is used as highly efficient photoconductor in photoconductive compositions utilized for the production of electrophotographic photoreceptors.

REFERENCES:
patent: 3121006 (1964-02-01), Middleton et al.
patent: 3694201 (1972-09-01), Behringer
patent: 3870516 (1975-03-01), Smith et al.
patent: 3894868 (1975-07-01), Regensburger
patent: 3911091 (1975-10-01), Karam et al.
patent: 3953207 (1976-04-01), Horgan
patent: 4225222 (1980-09-01), Kempter
patent: 4265991 (1981-05-01), Hirai et al.
Moustakas et al., "Preparation of Highly Photoconductive Amorphous Silicon by rf Sputtering", Solid State Comm., vol. 23, No. 3, pp. 155-158 (1977).

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