Abstract: A composition which can resolve the conflicting relationship between patternability, film formability, and high refractive index required for an optical waveguide-forming composition, and which can satisfy these requirements. The optical waveguide-forming composition including: a fluorene skeleton-containing epoxy compound (A) of the following Formula [1]: (in Formula [1], L1 and L2 are each independently a naphthalenediyl group possibly having a substituent; and m and n are each independently an integer of 0 to 10); a monofunctional or bifunctional alicyclic epoxy compound (B); a monofunctional or bifunctional aromatic epoxy compound (C) different from the compound (A); and a photoacid generator (D), and an optical waveguide including a cured product of the optical waveguide-forming composition.

Abstract: This composition for a hole collecting layer of an organic photoelectric conversion element contains: a charge-transporting substance comprising a polyaniline derivative represented by formula (1); a fluorine-based surfactant; and a solvent. The composition provides a thin film suitable for a hole collecting layer of an organic photoelectric conversion element, and is particularly suited for producing an inverse lamination type organic photoelectric conversion element. (In the formula, R1 to R6 each independently represent a hydrogen atom, etc., but one of R1 to R4 is a sulfonic acid group, one or more of the remaining R1 to R4 are a C1-20 alkoxy group, a C1-20 thioalkoxy group, a C1-20 alkyl group, a C2-20 alkenyl group, a C2-20 alkynyl group, a C1-20 haloalkyl group, a C6-20 aryl group, or a C7-20 aralkyl group, and m and n are numbers which satisfy 0?m?1, 0?n?1 and m+n=1).

Abstract: This method for producing a charge transporting thin film, wherein a charge transporting varnish containing a charge transporting substance, an electron accepting dopant substance containing at least one substance selected from among naphthalene sulfonates and benzene sulfonates, and an organic solvent is applied onto a substrate and is subsequently heated at 100-180° C. so that the organic solvent is evaporated therefrom, is capable of efficiently producing a charge transporting thin film which is able to be used as a hole collecting layer that enables the achievement of an organic photoelectric conversion element having high photoelectric conversion efficiency.

Abstract: A charge transport varnish containing a charge transport substance, an electron-accepting dopant substance, and an organic solvent, wherein the electron-accepting dopant substance contains one or more types selected from naphthalene disulfonic acid, naphthalene trisulfonic acid, and naphthalene tetrasulfonic acid. This charge transport varnish is suitable for forming a hole collection layer that can be used to produce an organic photoelectric conversion element which exhibits high photoelectric conversion efficiency.

Abstract: This composition for a hole collecting layer of an organic photoelectric conversion element contains: a charge-transporting substance comprising a polyaniline derivative represented by formula (1); a fluorine-based surfactant; and a solvent. The composition provides a thin film suitable for a hole collecting layer of an organic photoelectric conversion element, and is particularly suited for producing an inverse lamination type organic photoelectric conversion element. (In the formula, R1 to R6 each independently represent a hydrogen atom, etc., but one of R1 to R4 is a sulfonic acid group, one or more of the remaining R1 to R4 are a C1-20 alkoxy group, a C1-20 thioalkoxy group, a C1-20 alkyl group, a C2-20 alkenyl group, a C2-20 alkynyl group, a C1-20 haloalkyl group, a C6-20 aryl group, or a C7-20 aralkyl group, and m and n are numbers which satisfy 0?m?1, 0?n?1 and m+n=1.

Abstract: Provided is a composition for a hole trapping layer of an organic photoelectric conversion element, such composition: containing a solvent and a charge-transporting substance comprising a polyaniline derivative represented by formula (1); and providing a thin film that is suitable as a hole trapping layer of an organic photoelectric conversion element and can also be used to produce an inverse lamination type organic photoelectric conversion element.

Abstract: A photosensor element that is capable of achieving a good balance between high photoelectric conversion efficiency and low dark current is able to be obtained by using a composition for forming a hole collecting layer of a photosensor element, which contains an organic solvent and a charge-transporting material that is composed, for example, of an aniline derivative or thiophene derivative represented by one of formulae (AA)-(DD) and having a molecular weight of 200-2,000.

Abstract: A charge transport varnish containing a charge transport substance, an electron-accepting dopant substance, and an organic solvent, wherein the electron-accepting dopant substance contains one or more types selected from naphthalene disulfonic acid, naphthalene trisulfonic acid, and naphthalene tetrasulfonic acid. This charge transport varnish is suitable for forming a hole collection layer that can be used to produce an organic photoelectric conversion element which exhibits high photoelectric conversion efficiency.

Abstract: Provided is a composition for a hole trapping layer of an organic photoelectric conversion element, such composition: containing a solvent and a charge-transporting substance comprising a polyaniline derivative represented by formula (1); and providing a thin film that is suitable as a hole trapping layer of an organic photoelectric conversion element and can also be used to produce an inverse lamination type organic photoelectric conversion element.

Abstract: Provided is a composition comprising: a charge-transporting substance that comprises N,N?-diphenylbenzidine; an electron-accepting dopant substance; and an organic solvent. This composition is suitable, for example, as a composition for the anode buffer layer of an organic thin film solar cell, said composition being used to produce a thin film that is suitable for use as an anode buffer layer that makes it possible to achieve an organic thin film solar cell having a high photoelectric conversion efficiency.

Abstract: A photosensor element that is capable of achieving a good balance between high photoelectric conversion efficiency and low dark current is able to be obtained by using a composition for forming a hole collecting layer of a photosensor element, which contains an organic solvent and a charge-transporting material that is composed, for example, of an aniline derivative or thiophene derivative represented by one of formulae (AA)-(DD) and having a molecular weight of 200-2,000.

Abstract: Provided is a composition comprising: a charge-transporting substance that comprises N,N?-diphenylbenzidine; an electron-accepting dopant substance; and an organic solvent. This composition is suitable, for example, as a composition for the anode buffer layer of an organic thin film solar cell, said composition being used to produce a thin film that is suitable for use as an anode buffer layer that makes it possible to achieve an organic thin film solar cell having a high photoelectric conversion efficiency.