Photoelectric conversion element
AssigneeSumitomo Chemical Company, Limited
InventorsTakahiro Seike, Giovanni Ferrara
Life of this patent
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Abstract
To improve detectivity of a photoelectric conversion element (10). A photoelectric conversion element including a pair of electrodes (12, 16), an active layer (14) provided between the pair of electrodes, and an intermediate layer (13. 15) provided between the active layer and at least one of the pair of electrodes, in which the intermediate layer has a surface that is in contact with the active layer, the surface having a surface roughness having an absolute value greater than 0.22 nm but smaller than 1.90 nm, and in which the active layer is not less than 350 nm but not more than 800 nm in thickness.
Claims14
A light detecting element comprising a pair of electrodes, an active layer provided between the pair of electrodes, and an intermediate layer provided between the active layer and at least one of the pair of electrodes,
- wherein the intermediate layer has a surface that is in direct contact with the active layer, the surface having a surface roughness in a range of 0.55 nm to 1.24 nm,
- a thickness of the active layer is not less than 400 nm but not more than 700 nm;
- wherein the intermediate layer is an electron transport layer;
- wherein the electron transport layer comprises a polyalkylene imine or a derivative thereof,
- wherein the active layer comprises an n-type semiconductor material and a p-type semiconductor material, and
- wherein the p-type semiconductor material is a polymer compound comprising a structural unit represented by the following formula (I) and/or a structural unit represented by the following formula (II):
- wherein in formula (I), Ar1 and Ar2 are trivalent aromatic heterocyclic groups, and Z is a group represented by formulae (Z-1) to (Z-7),
- —Ar3— (II),
- wherein in formula (II), Ar3 is a divalent aromatic heterocyclic group,
- wherein in formulae (Z-1) to (Z-7), each R is independently selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, a monovalent heterocyclic group, a substituted amino group, an acyl group, an imine residue, an amide group, an acid imide group, a substituted oxy carbonyl group, an alkenyl group, an alkynyl group, a cyano group, and a nitro group.
A light detecting element comprising:
- a support substrate;
- a first electrode that is a thin electrically conductive film in direct contact with the support substrate and supported by the support substrate;
- an intermediate layer in direct contact with the thin electrically conductive film;
- an active layer in direct contact with the intermediate layer, and
- a second electrode on the active layer,
- wherein the intermediate layer has a surface that is in direct contact with the active layer, the surface having a surface roughness in a range of 0.55 nm to 1.24 nm,
- a thickness of the active layer is not less than 400 nm but not more than 700 nm,
- wherein the intermediate layer is an electron transport layer;
- wherein the electron transport layer comprises a polyalkylene imine or a derivative thereof,
- wherein the active layer comprises an n-type semiconductor material and a p-type semiconductor material, and
- wherein the p-type semiconductor material is a polymer compound comprising a structural unit represented by the following formula (I) and/or a structural unit represented by the following formula (II):
- wherein in formula (I), Ar1 and Ar2 are trivalent aromatic heterocyclic groups, and Z is a group represented by formulae (Z-1) to (Z-7),
- —Ar3— (II)
- wherein in formula (II), Ar3 is a divalent aromatic heterocyclic group,
- wherein in formulae (Z-1) to (Z-7), each R is independently selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, a monovalent heterocyclic group, a substituted amino group, an acyl group, an imine residue, an amide group, an acid imide group, a substituted oxy carbonyl group, an alkenyl group, an alkynyl group, a cyano group, and a nitro group.
Dependencies are inferred from the claim text.