Fuji Electric Co., Ltd.

Samsung Electronics Co., Ltd.

Shinshu University

Toshiki Takeuchi

Shinjiro Suzuki

Seizo Kitagawa

Kazuya Saito

Fengqiang Zhu

Kyung Bae Park

Kwang Hee Lee

Kyu Sik Kim

Musubu Ichikawa

Masaru Takeuchi

Hirotaka Kobayashi

Toshiki Obinata

An electrophotographic photoreceptor, including a photosensitive layer formed on an electroconductive substrate. The photosensitive layer includes a charge-generating material and an electron-transporting material, and the electron-transporting material includes first and second electron-transporting materials. A difference in lowest unoccupied molecular orbital (LUMO) energy between the first electron-transporting material and the charge-generating material is in a range from 1.0 to 1.5 eV, and a difference in LUMO energy between the second electron-transporting material and the charge-generating material is in a range from 0.6 to 0.9 eV. A ratio of mass of the second electron-transporting material to a total of mass of the first electron-transporting material and the mass of the second electron-transporting material is in a range from 3 to 40%.

Electrophotographic photoreceptor, method for manufacturing same, and electrophotographic device

A photoreceptor for electrophotography, a method for manufacturing the photoreceptor, and an electrophotographic device including the photoreceptor are disclosed. The photoreceptor for electrophotography includes a conductive substrate; and a photosensitive layer that is provided on the conductive substrate and that has an outermost surface layer containing at least a resin binder and an electron transport material. The resin binder is composed of a polyarylate resin having a structural unit represented by a Chemical Structural Formula 1, and the electron transport material is composed of a compound having a structure represented by a Structural Formula (ET2-3). The photoreceptor has high sensitivity, low residual electric potential, no light fatigue and sufficient stain resistance.

Photoreceptor for electrophotography, method for manufacturing the same, and electrophotographic device

Provided is a positively charged electrophotographic photoconductor, a manufacturing method thereof, and an electrophotographic apparatus using the same. The positively charged electrophotographic photoconductor includes an electroconductive support and a single layer-type photosensitive layer provided thereon including a charge generation material, a hole transport material, an electron transport material, and a mixed binder resin. Alternately, the positively charged electrophotographic photoconductor includes an electroconductive support; a charge transport layer provided on the electroconductive support and containing at least a hole transport material, and a binder resin; and a charge generation layer provided on the charge transport layer and including at least a charge generation material, a hole transport material, an electron transport material, and a mixed binder resin. In either embodiment, the mixed binder resin contains at least two resins including a polycarbonate-based resin selected to provide the mixed binder resin with a water vapor permeability ranging from 5 to 13 g/m&#xb7;day.

Electrophotographic photoconductor, manufacturing method thereof, and electrophotographic apparatus using the same

An electrophotographic photoreceptor which, even when mounted on a high-image-quality monochrome high-speed printer or tandem color printer including a cleaner-less process of a non-magnetic single-component contact development system using a polymerized toner, inhibits the generation of fine black spots or color spots and suppresses the occurrence of toner filming during the initial printing under a high-temperature and high-humidity environment and thereby stably attains a high image quality in a variety of environments. The electrophotographic photoreceptor is a positively-chargeable electrophotographic having a contact angle between the surface of an outermost layer and water that is in a range of 81&#xb0; to 87&#xb0; and having a binder resin of an outermost layer containing resins having repeating units represented by Formula (1) and Formula (2) below: 

Electrophotographic photoreceptor, method for producing the same, and electrophotographic apparatus using the same

According to example embodiments, a photoelectric conversion device includes a first electrode including a light-receiving surface, a second electrode spaced apart from the first electrode and facing the first electrode, and an auxiliary layer between the second electrode and an exciton producing layer. The first electrode may be on the second electrode. The exciton producing layer may be between the first electrode and the second electrode. The exciton producing layer may be spaced apart from the second electrode by a distance corresponding to one of a crest and a trough of a standing wave of light to be converted into electricity.

Photoelectric conversion device

An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer, wherein an outermost layer contains a compound having a structure represented by general formula (I) below: 

Electrophotographic photoreceptor, method for manufacturing same and electrophotographic device

In a negatively-chargeable laminate-type electrophotographic photoreceptor, a charge generation layer and another charge transport layer are arranged on a conductive substrate directly or via an intermediate layer. The charge transport layer contains at least a hole-transporting substance, an electron-transporting substance and a binder resin; the mass ratio (R) [% by mass] between mass (P) of the hole-transporting substance and mass (N) of the electron-transporting substance is represented by the following equation (1), and satisfies the following equation (2):=(/())&#xd7;100&#x2003;&#x2003;(1)1&#x2266;&#x2266;40&#x2003;&#x2003;(2); andwhen a voltage of +6 kV is applied to the photoreceptor for 5 seconds via a resin sheet having a thickness of 50 &#x3bc;m and a surface resistivity of 2&#xd7;10&#x3a9;/cm, the surface potential difference (&#x394;Vo) and half-tone potential difference (&#x394;Vh) between before and after the voltage application are both 15 V or less.

Growing community of inventors

Matsumoto, Japan

Toshiki Takeuchi