PHOTOELECTRIC CONVERSION ELEMENT, SOLAR BATTERY AND METHOD OF FORMING POROUS LAYER OF PHOTOELECTRIC CONVERSION ELEMENT

• Main Authors: HANAKI NAOYUKI, SHIROKANE KENJI, SATO HIROTAKA
• Format: Patent
• Language: English; Japanese
• Published: 12.01.2017
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

PROBLEM TO BE SOLVED: To provide a photoelectric conversion element that is excellent in photoelectric conversion efficiency between elements and can reduce variation of the photoelectric conversion efficiency at high level, and a solar battery using the same, and also provide a method of forming a porous layer containing a perovskite compound suitable for manufacturing of the photoelectric conversion element.SOLUTION: In a photoelectric conversion element including a first electrode 1A which has a porous layer 12 and a photosensitive layer 13A containing light absorber in this order on a conductive support body 11, and a second electrode 2 facing the first electrode. The light absorber contains a perovskite compound, Rp of the surface of the porous layer is equal to 0.20 μm or less, and Rv is equal to -0.20 μm or more. A method for forming a porous layer of a photoelectric conversion element comprises a step of dispersing porous material on the conductive support body to coat paste, and a step of burning the coated paste at a specific temperature to form a porous layer having a surface having a specific shape. Solvent having a boiling point of 200°C or higher is contained in the solvent of paste by 1 mass% or more.SELECTED DRAWING: Figure 1 【課題】素子間の光電変換効率に優れ、そのばらつきを高度に低減できる光電変換素子、およびこれを用いた太陽電池を提供する。光電変換素子の製造に好適なペロブスカイト化合物を含む多孔質層の形成方法を提供する。【解決手段】導電性支持体１１上に、多孔質層１２と、光吸収剤を含む感光層１３Ａとをこの順に有する第一電極１Ａと、第一電極に対向する第二電極２とを有する光電変換素子であって、光吸収剤がペロブスカイト化合物を含み、多孔質層表面のＲｐが０．２０μｍ以下であり、且つ、Ｒｖが−０．２０μｍ以上である。光電変換素子の多孔質層の形成方法であって、導電性支持体上に多孔質材料を分散してなるペーストを塗布する工程と、塗布したペーストを特定温度で焼成し、特定形状の表面を有する多孔質層を形成する工程とを含み、ペーストの溶媒中に、沸点２００℃以上の溶媒が１質量％以上含まれる。【選択図】図１