Konica Corporation

Kiyoshi Tamaki

Yoshiaki Takei

Yoshihide Fujimaki

Hajime Tadokoro

Yoshihiko Etoh

Koichi Kudoh

Shigeki Takeuchi

Akira Kinoshita

Toyoko Shibata

Kazumasa Watanabe

Tomomi Oshiba

Fumitaka Mochizuki

Shigeki Takenouchi

Hideo Yoshizawa

Kouji Nishizaki

Hideyuki Matsumoto

An organic thin film electroluminescence element is disclosed. It comprises an organic compound represented by formula I in a luminescent layer or electron injection layer. The element may further comprises a compound represented by formula II in a hole injection layer. ##STR1## The definition is detailed in the description. The element has a greater intensity of luminescence and a high durability.

Organic thin film electroluminescence element

An electrophotographic photoreceptor is disclosed. The photoreceptor comprises a conductive substrate and a photosensitive layer provided on the substrate. The photosensitive layer comprises titanylphthalocyanine having a peak at a Bragg angle 2.theta. of 27.2.degree..+-.2.degree. in the Cu-K.alpha. X ray-diffraction spectrum thereof and an alkyldiol which has 3 to 12 carbon atoms and the two hydroxyl group is bonded to carbon atoms arranged at different position in the molecular thereof. The amount of the diol is 0.1 to 1000 parts by weight per 100 parts by weight of the titanyl-phthalocyanine.

Electrophotographic photoreceptor with titanyl phthaloycyanine

An electrophotographic photoreceptor is disclosed. The photoreceptor comprises a conductive support and a photosensitive layer provided thereon. The photosensitive layer contains a carrier generation material and a compound represented by the following formula 1, 2 or 3; ##STR1## wherein R.sub.1, R.sub.11 and R.sub.21 are each a hydrogen atom, an alkyl group, an alkoxy group, a cycloalkyl group, an alkenyl group, an aryl group, and aryloxy group or a heterocylic group; R.sub.2 to R.sub.9, R.sub.12 to R.sub.19 and R.sub.22 to R.sub.29 are independently a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a cycloalkyl group, an aryl group or a heterocyclic group, said groups represented by R.sub.1 to R.sub.9, R.sub.11 to R.sub.19 and R.sub.21 to R.sub.29 each may have a substituent selected form a halogen atom, an alkyl group, an alkoxy group, an aryl group, an aryloxy group, a thioether group, an acyl group and sulfonamido group.

Electrophotographic photoreceptor having an organic

Disclosed is an electrophotographic photoreceptor which comprises a conductive substrate and a photosensitive layer formed thereon, wherein the photosensitive layer contains a polysilane which is a homopolymer or a copolymer having at least one of repeating units represented by Formula (I) and Formula (II), and at least one of degradation inhibitors represented by Formula (III) through Formula (VIII), ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, an alkylsilyl group or an arylsilyl group, ##STR2## wherein A.sub.1 represents an oxygen atom or a sulfur atom

Electrophotographic photoreceptor

An electrophotographic photoreceptor is disclosed. The photoreceptor comprises a conductive support and provided thereon, a layer comprising a carrier generating material and a polymer having a repetition unit represented by the following formula (1); ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 independently represent a hydrogen atom, an alkyl group, an alkoxy group, an alkenyl group, an aryl group, an alkylsilyl group or an arylsilyl group, and n is a natural number.

Electrophotographic photoreceptor employing polysilane-type carrier

Electrophotographic photosensitive member

Image forming method

Growing community of inventors

Hachioji, Japan

Kiyoshi Tamaki