US-20260130044-A1 - PHOTOELECTRIC CONVERSION MODULE

Abstract

A photoelectric conversion module according to the present disclosure includes: a substrate; a photoelectric conversion element; and a first sealing member, wherein the photoelectric conversion element is sealed by the substrate and the first sealing member, the first sealing member includes a first sealing portion formed of a first sealing material, and the first sealing material includes at least one selected from the group consisting of polyvinyl alcohol, an ethylene-vinyl alcohol copolymer, and a butylenediol-vinyl alcohol copolymer. The photoelectric conversion element may include, for example, a first electrode, a photoelectric conversion layer, and a second electrode in this order.

Inventors

• Hiroshi Higuchi

Assignees

• PANASONIC HOLDINGS CORPORATION

Dates

Publication Date

20260507

Application Date

20251230

Priority Date

20220107

Claims (8)

1. 1 . A photoelectric conversion module comprising: a substrate; a photoelectric conversion element; a first sealing member; a second sealing member; and a conductive wire, wherein the photoelectric conversion element is sealed by the substrate and the first sealing member, and the conductive wire is electrically connected to the photoelectric conversion element and extends to an outside by penetrating the first sealing member and the second sealing member.
2. 2 . The photoelectric conversion module according to claim 1 , wherein the conductive wire extends from inside a sealed space to the outside by penetrating the first sealing member and then penetrating the second sealing member.
3. 3 . The photoelectric conversion module according to claim 1 , wherein the second sealing member is disposed at an outer side relative to the first sealing member.
4. 4 . The photoelectric conversion module according to claim 1 , wherein the photoelectric conversion element comprises a photoelectric conversion layer which includes a perovskite compound.
5. 5 . The photoelectric conversion module according to claim 1 , wherein at least a part of the conductive wire is disposed above the photoelectric conversion element in a thickness direction of the substrate.
6. 6 . The photoelectric conversion module according to claim 5 , wherein the conductive wire is electrically connected to the photoelectric conversion element via a connection point on an upper surface of the photoelectric conversion element.
7. 7 . The photoelectric conversion module according to claim 6 , wherein the connection point is a terminal.
8. 8 . The photoelectric conversion module according to claim 1 , wherein the second sealing member is formed of a material including butyl rubber.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This is a Continuation of U.S. patent application Ser. No. 18/763,587, filed Jul. 3, 2024, which is a continuation of International Pat. Appl. No. PCT/JP2022/042635, filed Nov. 16, 2022, which claims the benefit of Japanese Pat. Appl. No. 2022-001951, filed Jan. 7, 2022. The disclosure of each of the above-mentioned documents, including the specification, drawings, and claims, is incorporated herein by reference in its entirety. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photoelectric conversion module. 2. Description of Related Art Main functions of photoelectric conversion elements include a function of converting light into electricity and a function of converting electricity into light. Examples of photoelectric conversion elements with an optimized function of converting light into electricity include a photo-detecting element, a photo-receiving element, and a solar cell element. Examples of photoelectric conversion elements with an optimized function of converting electricity into light include an LED element (light-emitting diode element) and an EL element (electroluminescent element). A photoelectric conversion element is formed of members such as a semiconductor layer for performing photoelectric conversion, an electrode layer for extracting current from the semiconductor layer, and a collection electrode layer for lowering resistance. These components undergo chemical changes due to external influences, resulting in degradation in performance of the photoelectric conversion element. One of the main external influences is water. It is reported in Q. Sun and eight others, Advanced Energy Materials, July 2017, Volume 7, p. 1700977, that atmospheric water vapor reacts with perovskite compounds. The reaction results in formation of substances such as lead iodide, methylammonium iodide, or hydrated compounds on the surface and grain boundaries of the perovskite compound, where the substances do not contribute to power generation. As a countermeasure, a sealing layer is provided between the above-mentioned members and the outside world to isolate the photoelectric conversion element from the influence of the outside world, that is, to create a photoelectric conversion module. However, the performance degradation of photoelectric conversion elements is not only caused by water, but oxygen may also affect considerably the performance. It is reported in Q. Sun and eight others, Advanced Energy Materials, July 2017, Volume 7, p. 1700977 that, under light irradiation, cations in the perovskite compound react with oxygen, so that a metal oxide or hydroxide is formed on the surface and grain boundaries of the perovskite compound. SUMMARY OF THE INVENTION As mentioned above, oxygen is a major cause of performance degradation of the photoelectric conversion element. However, the conventional configuration cannot block oxygen sufficiently, and there has been a demand for improving durability of the photoelectric conversion module. The present disclosure aims to provide a photoelectric conversion module with improved durability. A photoelectric conversion module of the present disclosure includes: a substrate;a photoelectric conversion element; anda first sealing member,wherein the photoelectric conversion element is sealed by the substrate and the first sealing member,the first sealing member includes a first sealing portion formed of a first sealing material, andthe first sealing material includes at least one selected from the group consisting of polyvinyl alcohol, an ethylene-vinyl alcohol copolymer, and a butylenediol-vinyl alcohol copolymer. The present disclosure provides a photoelectric conversion module with improved durability. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view schematically showing a photoelectric conversion module 100 according to a first embodiment. FIG. 2 is a partial enlarged cross-sectional view of a photoelectric conversion module of the present disclosure, schematically showing a first configuration example of a photoelectric conversion element 2 of the present disclosure. FIG. 3 is a partial enlarged cross-sectional view of a photoelectric conversion module of the present disclosure, schematically showing a second configuration example of the photoelectric conversion element 2 of the present disclosure. FIG. 4 is a cross-sectional view schematically showing a first configuration example of a photoelectric conversion module according to a second embodiment. FIG. 5 is a cross-sectional view schematically showing a second configuration example of the photoelectric conversion module according to the second embodiment. FIG. 6 is a cross-sectional view schematically showing a third configuration example of the photoelectric conversion module according to the second embodiment. FIG. 7 is a cross-sectional view schematically showing a fourth configuration example of the photoelectric con