Research on photoreceptor materials for the ultra-high-density laser printer

This report is a summary of the research project of " research on photoreceptor materials for theultra-high-density laser printer advanced by the Ministry of Education Scientific research subsidy(基本研究（B) (2)） from 1997 to 1999 fiscal year.Recently，the input equipment such high minute digital cameras and scanners are increasing according to thedevelopment of the image processing technology. Many of printers as output equipment are obtaininga minute image of about 1200dpi. However，这些printers do not reach at the level of the chloridization silver photoh with the resolution3600dpi或更多。这是必要的，以改变激光光源laser printer had this resolution.In this research，the zinc oxide was examined as a photoreceptor material by using the near-ultraviolet light as alight source for the laser printer. As the preparing method of the zinc oxide，这是assumed the sputtering method with easy preparing method and the MO-CVD method which was ableto be progressed industrially, and was clarified crystalline, a compositionelectricity and an optical characteristic to the zinc oxide films obtained by these preparingmethods. li doped zinc oxide films prepared by MO-CVD methods exhibited a large dark-conductivity of3.72x10, D16, D1（Ω， cm）. Lithium was used as p-type dopant source. as for the光学敏感性required from the ratio of photoconductivity (σp) and dark conductivity （σd）the values of 3.71x10 - D12 - D1 was obtainedrise and decay photoresponse was very quick.这是确认可以适用于zinc oxidefilms to the photoreceptor for the ultra-high-density laser printer。

This report is a summary of the research project of "Research on photoreceptor materials for the ultra-high-density laser printer" advanced by the Ministry of Education Scientific research subsidy (basic research (B) (2)) from 1997 to 1999 fiscal year.Recently, the input equipment such as high minute digital cameras and scanners are increasing according to the development of the image processing technology. Many of printers as output equipment are obtaining a minute image of about 1200dpi. However, these printers do not reach at the level of the chloridization silver photograph with the resolution of 3600dpi or more. It was necessary to change near-ultraviolet laser light source to obtain the laser printer had this resolution.In this research, the zinc oxide was examined as a photoreceptor material by using the near-ultraviolet light as a light source for the laser printer. As the preparing method of the zinc oxide, it was assumed the sputtering method with easy preparing method and the MO-CVD method which was able to be progressed industrially, and was clarified crystalline, a composition, and electricity and an optical characteristic to the zinc oxide films obtained by these preparing methods.Li doped zinc oxide films prepared by MO-CVD methods exhibited a large dark-conductivity of 3.72x10ィイD16ィエD1(Ω・cm). Lithium was used as p-type dopant source. As for the optical sensitivity required from the ratio of photoconductivity (σp) and dark conductivity (σd), the values of 3.71x10ィイD12ィエD1 was obtained, and rise and decay photoresponse was very quick. It was confirmed to be able to apply the zinc oxide films to the photoreceptor for the ultra-high-density laser printer.