JP2017224774A - Photoelectric conversion element and module protection case - Google Patents

Photoelectric conversion element and module protection case Download PDF

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JP2017224774A
JP2017224774A JP2016120420A JP2016120420A JP2017224774A JP 2017224774 A JP2017224774 A JP 2017224774A JP 2016120420 A JP2016120420 A JP 2016120420A JP 2016120420 A JP2016120420 A JP 2016120420A JP 2017224774 A JP2017224774 A JP 2017224774A
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photoelectric conversion
conversion element
solar cell
glass
reinforced resin
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JP6838295B2 (en
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克 菅原
Katsu Sugawara
克 菅原
純一 志熊
Junichi Shiguma
純一 志熊
敦美 甲田
Atsumi Koda
敦美 甲田
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/542—Dye sensitized solar cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

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Abstract

PROBLEM TO BE SOLVED: To provide a photoelectric conversion element and a module protection case which are hard to be damaged without impairing the transmittance of a glass dye sensitized solar cell.SOLUTION: A photoelectric conversion element (glass dye sensitized solar cell) 1 is a photoelectric conversion element 1 having glass substrates 2a and 2b. A reinforced resin plate 3 is provided on the glass substrates 2a and 2b. A module protection case (protection case) 4 is characterized in that the reinforced resin plate 3 using the photoelectric conversion element 1 is the outer surface.SELECTED DRAWING: Figure 4

Description

本発明は、太陽電池の光電変換素子に関し、特にガラス製色素増感太陽電池の光電変換素子及びモジュール保護ケースに関する。   The present invention relates to a photoelectric conversion element for a solar cell, and particularly to a photoelectric conversion element and a module protective case for a glass dye-sensitized solar cell.

近年、太陽電池に比べ低コストで作製でき、高純度シリコンを使用しないなど材料の制約も少ない色素増感太陽電池の実用化が期待される一方、当該太陽電池のパネルであるガラス基板の損傷や破損を防ぐため、そのガラス基板に保護フィルムを貼付する対処がなされている。
例えば、特許文献１では、ガラス製色素増感太陽電池のガラス基板上に樹脂系の保護フィルム（アルミニウム、シリカ、アルミナ）を接着層（エポキシ樹脂、ウレタン樹脂、シリコン樹脂、アクリル樹脂）で固定した一例を記載している。 In recent years, it has been expected that a dye-sensitized solar cell that can be produced at a lower cost than solar cells and that does not use high-purity silicon will have few material restrictions. In order to prevent breakage, measures are taken to attach a protective film to the glass substrate.
For example, in Patent Document 1, a resin-based protective film (aluminum, silica, alumina) is fixed to a glass substrate of a glass dye-sensitized solar cell with an adhesive layer (epoxy resin, urethane resin, silicon resin, acrylic resin). An example is described.

しかしながら、ガラス基板に保護フィルムを貼付することは、光を低減させ、色素増感太陽電池の発電効率を下げてしまう問題がある。
そこで、ガラス基板よりむしろプラスチック基板の方が入射した光をよく通し、基板の光学特性により太陽電池性能が低下し難いプラスチック基板に変更することが考えられる。 However, attaching a protective film to a glass substrate has a problem of reducing light and reducing the power generation efficiency of the dye-sensitized solar cell.
Therefore, it is conceivable that the plastic substrate rather than the glass substrate allows the incident light to pass through more and is changed to a plastic substrate in which the solar cell performance is hardly deteriorated due to the optical characteristics of the substrate.

例えば、特許文献２では、色素増感太陽電池のガラス基板をプラスチック基板に変更することで、可撓性、耐久性、低コスト性を向上可能することが記載されている。   For example, Patent Document 2 describes that flexibility, durability, and low cost can be improved by changing a glass substrate of a dye-sensitized solar cell to a plastic substrate.

ところが、一般的な色素増感太陽電池モジュールの製造工程において、色素増感太陽電池に用いられる多孔質半導体膜を形成するために、焼成処理が必要であり、プラスチックのガラス転移点の問題（プラスチック基板が耐えるとされる温度）から焼成温度を１５０度程度にしか上げることができない。このため、得られる多孔質半導体膜の結晶性や粒子間の結合状態が悪く、電子伝導性が低いことから、プラスチック基板を用いた色素増感太陽電池の発電効率はガラス基板を用いたものに対して低くなってしまう問題がある。   However, in the manufacturing process of a general dye-sensitized solar cell module, in order to form a porous semiconductor film used for the dye-sensitized solar cell, a baking treatment is necessary, and the problem of the glass transition point of plastic (plastic The firing temperature can only be raised to about 150 degrees from the temperature that the substrate is supposed to withstand. For this reason, the crystallinity and bonding state between particles of the obtained porous semiconductor film are poor, and the electron conductivity is low. Therefore, the power generation efficiency of the dye-sensitized solar cell using a plastic substrate is the same as that using a glass substrate. On the other hand, there is a problem of being lowered.

特開２００９−１４６６２５号公報JP 2009-146625 A 特開２０１４−１７５１９５号公報JP 2014-175195 A

そこで、本発明は、前述した課題に鑑みてなされたものであり、その目的は、ガラス製色素増感太陽電池の透過率を損なうことなく、破損し難い光電変換素子及びモジュール保護ケースを提供することにある。   Therefore, the present invention has been made in view of the above-described problems, and an object of the present invention is to provide a photoelectric conversion element and a module protective case that are not easily damaged without impairing the transmittance of the glass dye-sensitized solar cell. There is.

このような目的を達成するために、本発明は、ガラス基板を有する光電変換素子であって、当該ガラス基板上に強化樹脂板を備えたことを特徴とする。
本発明のモジュール保護ケースは、前記光電変換素子の強化樹脂板を外面としたことを特徴とする。 In order to achieve such an object, the present invention is a photoelectric conversion element having a glass substrate, wherein a reinforced resin plate is provided on the glass substrate.
The module protective case of the present invention is characterized in that the reinforced resin plate of the photoelectric conversion element is an outer surface.

本発明によれば、ガラス製色素増感太陽電池の透過率を損なうことなく、破損し難い光電変換素子及びモジュール保護ケースを提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the photoelectric conversion element and module protective case which are hard to damage can be provided, without impairing the transmittance | permeability of a glass dye-sensitized solar cell.

本発明の実施形態に係る光電変換素子及びモジュール保護ケースの全体組立て前の分解図である。It is an exploded view before the whole assembly of the photoelectric conversion element and module protection case which concern on embodiment of this invention. 本発明の実施形態に係る光電変換素子及びモジュール保護ケースの斜視図である。It is a perspective view of the photoelectric conversion element and module protection case which concern on embodiment of this invention. 本発明の実施形態に係る光電変換素子及びモジュール保護ケースの側面図である。It is a side view of the photoelectric conversion element and module protection case which concern on embodiment of this invention. 図３の光電変換素子及びモジュール保護ケースをＡ−Ａ線で切った平面視略断面図である。FIG. 4 is a schematic cross-sectional view in plan view of the photoelectric conversion element and module protection case of FIG. 3 cut along line AA. 本発明の実施形態に係る光電変換素子の拡大略断面図である。1 is an enlarged schematic cross-sectional view of a photoelectric conversion element according to an embodiment of the present invention.

以下、本発明の光電変換素子及びモジュール保護ケースの一実施形態を図に基いて説明する。なお、本発明は本実施形態に限定解釈されるものではなく本発明の範囲内において適宜設計変更可能である。   Hereinafter, an embodiment of a photoelectric conversion element and a module protective case of the present invention will be described with reference to the drawings. It should be noted that the present invention is not construed as being limited to the present embodiment, and the design can be changed as appropriate within the scope of the present invention.

本実施形態に係る光電変換素子１（ガラス製色素増感太陽電池）は、四角形状のガラス基板２ａの上に透明導電膜２ｃ、多孔質金属酸化物半導体２ｄ、増感色素２ｅ、電荷輸送剤層２ｆ、触媒層２ｇ（以下、総じて色素半導体２という。（図５参照。））を備え、そして光電変換素子１の表面に強化樹脂板３を備えて構成されている。なお、本実施形態では、光電変換素子１は、色素半導体２を挟む両面にガラス基板２ａ、２ｂを備えた積層状態としている。
また、本実施形態では、強化樹脂板３を用いて三角錐状の中空の保護ケース４を構成している（図１参照。）。
例えば、本実施形態では、三角錐を形成する３つの側面３ａ、３ｂ、３ｃに強化樹脂板３を用い、底面３ｄには上記強化樹脂板３と同素材からなる強化樹脂板３を用いている。そして、側面３ａ、３ｂ、３ｃに光電変換素子１が取り付けられている。また、光電変換素子１は、側面３ａ、３ｂ、３ｃのどれか一つに取り付けられていれば良い。保護ケース４内に収容されるモジュールとしては、センサ、蓄電部、電圧増幅部、信号処理回路、無線発信部等を備えた無線センサ送信装置５が想定され、保護ケース４内に無線センサ送信装置５を備えて色素増感太陽電池を備えた無線センサ送信ユニットとしている（図２〜図５参照。）。 The photoelectric conversion element 1 (glass dye-sensitized solar cell) according to the present embodiment has a transparent conductive film 2c, a porous metal oxide semiconductor 2d, a sensitizing dye 2e, and a charge transfer agent on a square glass substrate 2a. A layer 2 f and a catalyst layer 2 g (hereinafter collectively referred to as a dye semiconductor 2 (see FIG. 5)) are provided, and a reinforced resin plate 3 is provided on the surface of the photoelectric conversion element 1. In the present embodiment, the photoelectric conversion element 1 is in a laminated state in which the glass substrates 2 a and 2 b are provided on both surfaces sandwiching the dye semiconductor 2.
Moreover, in this embodiment, the triangular protective pyramid-shaped protective case 4 is comprised using the reinforced resin board 3 (refer FIG. 1).
For example, in this embodiment, the reinforced resin plate 3 is used for the three side surfaces 3a, 3b, 3c forming the triangular pyramid, and the reinforced resin plate 3 made of the same material as the reinforced resin plate 3 is used for the bottom surface 3d. . And the photoelectric conversion element 1 is attached to side surface 3a, 3b, 3c. Moreover, the photoelectric conversion element 1 should just be attached to any one of side surface 3a, 3b, 3c. As a module housed in the protective case 4, a wireless sensor transmission device 5 including a sensor, a power storage unit, a voltage amplification unit, a signal processing circuit, a wireless transmission unit, and the like is assumed. 5 is a wireless sensor transmission unit including a dye-sensitized solar cell (see FIGS. 2 to 5).

本実施形態では、光電変換素子１を構成する多孔質金属酸化物半導体２ｄ及び増感色素２ｅを円形状に７個を隣り合わせに配置して、大きな１個の丸を形成している（図３参照。）。多孔質金属酸化物半導体２ｄ及び増感色素２ｅの大きさや形状は、ガラス製色素増感太陽電池の容量に応じて変えることができ、本実施形態に限定されるものではない。   In the present embodiment, seven porous metal oxide semiconductors 2d and sensitizing dyes 2e constituting the photoelectric conversion element 1 are arranged in a circular shape adjacent to each other to form one large circle (FIG. 3). reference.). The size and shape of the porous metal oxide semiconductor 2d and the sensitizing dye 2e can be changed according to the capacity of the glass dye-sensitized solar cell, and are not limited to this embodiment.

強化樹脂板３は、例えば、前記光電変換素子１を覆う大きさの三角板状に形成され、厚みが０．５ｍｍ〜５ｍｍで、透過率が８０％以上の強化樹脂を想定している。例えば、強化樹脂の材料として、ポリ塩化ビニル、ポリエチレンテレフタレート、ポリエーテルサルフォン、ポリカーボネート、ポリスチレン、ポリメタクリル酸メチルが採用できる。これにより、ガラス基板２ａ、２ｂをプラスチックに変えることなく、ガラス基板２ａ、２ｂをそのまま使用することでき、破損し難いガラス製色素増感太陽電池を提供することができる。これにより、従来からのガラス製色素増感太陽電池のガラス基板２ａ、２ｂに本発明の強化樹脂で覆うだけの製造工程を入れるだけで、従来よりも破損し難い太陽電池を得ることができる。
また、強化樹脂板３によって覆われたガラス基板２ａ、２ｂがさらに強固に保護されることから、その強化樹脂板３によって増加した重量分を減らすためにガラス基板２ａ、２ｂの厚みを薄くして太陽電池を軽量化することができる。
強化樹脂板３は、前記光電変換素子１を構成する双方のガラス基板２ａ、２ｂのうちいずれか一方、本実施形態では、保護ケース４の外面を構成する一面に少なくとも備えられているが、少なくとも一方の面に強化樹脂板３が備えられていれば良く、双方に備えることを何等妨げるものではない。
なお、本実施形態では、角錐の側面は全て三角形で、底面も三角形である正三角錐としているが、その側面の高さや底面の大きさ等が異なっても良い。
また、ガラス基板２ａ、２ｂと強化樹脂板３との接着剤は特に限定されないが、電気的に絶縁性のある樹脂やガラスフリット等が用いられる。
接着剤を用いず組立式とし、分解可能としても良い。
また、無線センサ送信装置５は、センサでなくても、その他電力を用いて作動する装置に置き換えても良い。 The reinforced resin plate 3 is assumed to be, for example, a reinforced resin that is formed in a triangular plate shape that covers the photoelectric conversion element 1 and has a thickness of 0.5 mm to 5 mm and a transmittance of 80% or more. For example, polyvinyl chloride, polyethylene terephthalate, polyether sulfone, polycarbonate, polystyrene, or polymethyl methacrylate can be employed as the material for the reinforced resin. Thereby, the glass substrates 2a and 2b can be used as they are without changing the glass substrates 2a and 2b to plastic, and a glass dye-sensitized solar cell that is not easily damaged can be provided. Thereby, the solar cell which is hard to break than before can be obtained only by putting the manufacturing process only to cover with the reinforced resin of this invention in the glass substrate 2a, 2b of the conventional glass dye-sensitized solar cell.
In addition, since the glass substrates 2a and 2b covered with the reinforced resin plate 3 are more firmly protected, the thickness of the glass substrates 2a and 2b is reduced in order to reduce the weight increased by the reinforced resin plate 3. The solar cell can be reduced in weight.
The reinforced resin plate 3 is provided on at least one of the glass substrates 2a and 2b constituting the photoelectric conversion element 1 and on the one surface constituting the outer surface of the protective case 4 in the present embodiment. What is necessary is just to be equipped with the reinforced resin board 3 on one side, and it does not prevent what it provides for both.
In the present embodiment, the side surfaces of the pyramid are all triangular and the bottom surface is also a regular triangular pyramid. However, the height of the side surface, the size of the bottom surface, and the like may be different.
The adhesive between the glass substrates 2a and 2b and the reinforced resin plate 3 is not particularly limited, but an electrically insulating resin or glass frit is used.
It is good also as assembly type without using an adhesive agent and disassembly.
Further, the wireless sensor transmission device 5 may not be a sensor but may be replaced with another device that operates using electric power.

１ 光電変換素子（ガラス製色素増感太陽電池）
２ 色素増感半導体
２ａ、２ｂ ガラス基板
３ 強化樹脂板
４ モジュール保護ケース（保護ケース）
５ 無線センサ送信装置（モジュール）
1 Photoelectric conversion element (glass dye-sensitized solar cell)
2 Dye-sensitized semiconductor 2a, 2b Glass substrate 3 Reinforced resin plate 4 Module protective case (protective case)
5 Wireless sensor transmitter (module)

Claims (2)

ガラス基板を有する光電変換素子であって、
前記ガラス基板上に強化樹脂板を備えたことを特徴とする光電変換素子。 A photoelectric conversion element having a glass substrate,
A photoelectric conversion element comprising a reinforced resin plate on the glass substrate. 請求項１に記載の光電変換素子の強化樹脂板を外面としたことを特徴とするモジュール保護ケース。   A module protective case comprising the reinforced resin plate of the photoelectric conversion element according to claim 1 as an outer surface.
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