201241060 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種集光型太陽光電池之光學薄片》 【先前技術】 就太陽光發電面板之方式而言，常使用於太陽光之受 光面舖滿成一面通稱爲單元之太陽光電池的平板方式。但 ，因依此受光面積而舖滿之太陽光電池很昂貴，故很難降 低太陽光發電面板的成本。 從如此之背景，藉集光透鏡，開發出一種於小徑的太 陽光電池使在太陽光之受光面的光集光之集光型太陽光發 電面板（專利文獻1)。此集光型太陽光發電面板係使光 集光成數百倍，相較於平板方式，可大幅地刪減太陽光電 池之使用量。但，在使光集光成數百倍之集光型太陽光發 電面板中係必須使太陽光受光面朝太陽光之方向以二軸追 蹤。並且因考量此追蹤用之架台在屋外之使用環境，尋求 牢固性，若包含其設置費用，將抵消大幅地刪減當初昂貴 之太陽光電池的使用量之成本優勢。 目前，就使太陽光之追蹤簡便化而謀求低成本化之目 的，以一軸之追蹤或不進行追蹤，於集光透鏡使用樹脂製 之菲涅爾透鏡（Fresnel lens)的簡便、輕量之集光型太陽 光發電面板的開發正在進行。於樹脂係尋求高的光穿透性 ，但最近，就行動電話等之按鍵照光用背光裝置之導光板 用而言，已報告一種即使含有二氧化矽亦具有高的透明性 -5- 201241060 之聚矽氧橡膠組成物（專利文獻2 )。 不使太陽光受光面朝太陽光之方向進行追蹤者係已提 出於受光面配置稜形或梯形形狀之構件而集光之機構。然 而，可使用於此等之集光部形成材料的材料係液狀型或熱 塑性之材料，製造太陽光電池面板時之步驟變複雜，有成 爲成本上昇之因素的問題（專利文獻3〜4)。又，於太陽 光受光面使用菲涅爾透鏡作爲集光透鏡而使焦點的位置於 集光透鏡與太陽光電池單元之間，使電池之受光面朝向集 光透鏡而彎曲成凹形狀之構造已被提出（專利文獻5)。 進一步，於太陽光受光面配置稜鏡型薄片而使源自外部之 入射光對於受光面朝法線方向集光之後，使其光朝特定方 向反射或折射而配光，進一步，使其光藉全反射進行導光 而最後提高入射光之能量密度已被提出（專利文獻6)。 另外’兩面受光型之太陽光電池模組係已提出：於兩 面受光型太陽光電池單元（cell )的兩面介由光穿透性黏 著劑而藉光穿透性之封裝用玻璃板密封，固定於框架所構 成之兩面受光型太陽光電池模組（專利文獻7);不太考 量曰照之位置或設置角度，且容易處理並使用兩面受光型 太陽光電池之單元作爲道路標示裝置之方法（專利文獻8 )或使玻璃三明治型之面板設於表面與背面兩者之方法（ 專利文獻9)等’但任一者均成爲依受光面積而舖滿之構 成’可謂有可能很難降低太陽光發電面板之成本。 [先前技術文獻] -6- 201241060 [專利文獻] [專利文獻1]日本特開2003- 258291號公報 [專利文獻2]日本特開2010 - 83978號公報 [專利文獻3]日本特表2〇〇8 — 54 3 111號公報 [專利文獻 4] US2009/ 0314329A1 [專利文獻5]日本特開20〇7_ 48910號公報 [專利文獻6]日本特開20〇9 - 229581號公報 [專利文獻7]日本特開2004 - 259928號公報 [專利文獻8]日本特開2004 - 60637號公報 [專利文獻9]日本特開平η - 31834號公報 【發明內容】 [發明之槪要] [發明欲解決之課題] 爲使太陽光發電面板廣泛普及作爲地球溫暖化之問題 的解決對策，故必須達成與以系統商用電力系統所產生的 電力成本抵消程度的低成本化。其成本係太陽光發電面板 據說爲1〇〇圓（日幣）/ Wp，並尋求一種耐久性優且材料 費及菲涅爾透鏡形狀之加工費用便宜。 樹脂製之菲涅爾透鏡中係其材料一般可使用丙烯酸樹 脂、聚甲基丙烯酸甲酯樹脂、聚碳酸酯樹脂。但，尋求在 太陽光下超過20年之長期耐久性的集光型太陽光發電面 板中係以較此等之泛用樹脂耐紫外線性更高之聚矽氧樹脂 爲適宜。 201241060 使i矽氧樹脂加工成菲涅爾透鏡或稜鏡透鏡形狀時， 與泛用所使用之丙烯酸樹脂等相同，藉射出成型將樹脂注 入於模具內，以成型後取出製品之生產性低的加工製程進 行生產，故生產性低，結果製造成本變高。 從如此之理由，使用樹脂製之菲涅爾透鏡或稜鏡透鏡 等而簡便、輕量的集光型太陽光發電面板係很難實用化。 本發明係有鑑於如此之點，目的在於提供一種對於太 陽光照射而耐久性優異，例如具有菲涅爾透鏡形狀之菲涅 爾薄片、使太陽光齊聚於菲涅爾透鏡薄片的法線方向，故 在入射於稜鏡薄片之前，可使用來作爲使太陽光之入射齊 聚於法線方向之微透鏡片或稜鏡透鏡薄片之有機材料光學 薄片。又，本發明係即使一軸之追蹤或不進行追蹤，亦可 集光之兩面集光型太陽光電池的有機材料光學薄片，對於 太陽光照射而耐久性優異，又，相較於液狀型，壓延成型 、押出成型性優異，可簡便地進行太陽光集光部形狀之加 工的聚矽氧樹脂之材料與使用其之兩面集光型太陽光電池 的有機材料光學薄片。此有機材料光學薄片係可利用於例 如含有兩面集光型太陽光電池面板的集光型太陽光電池面 板。 [用以解決課題之手段] 本發明係提供一種集光型太陽光電池用之有機材料光 學薄片，其係使截面爲等腰梯形之2以上的光穿透性四角 柱並聯連結以使該等腰梯形的平行2邊之中具有長邊之四 201241060 角柱的入射側面成爲同一平面，太陽光從該入射個j面入射 ’通過該四角柱的內部而從該等腰梯形的平行2邊之中具 有短邊之四角柱的射出側面射出，爲了集光於被配置在該 射出側面之單元而使入射側面的一部分或全部爲曲面。又 本發明係提供一種如申請專利範圍第1〜8項中任一項之 集光型太陽光電池用之有機材料光學薄片，其中使上述射 出側面分別爲接合面，使含有該接合面之面作爲對稱面而 成爲面對稱般接合之第2上述有機材料光學薄片經組合之 兩面集光型’上述太陽光從上述入射側面入射，通過上述 四角柱的內部而從上述等腰梯形的平行2邊之中具有短邊 之四角柱的射出側面射出，同時地入射於第2四角柱，通 過第2四角柱之內部而從第2四角柱之截面的等腰梯形之 平行2邊之中具有長邊之第2四角柱的射出側面射出，爲 了集光於配置在該第2四角柱的射出側面之單元而使第2 射出側面的一部分或全部爲曲面之兩面集光型。 [發明之效果] 本發明之含有兩面集光型太陽光電池的集光型太陽光 電池之有機材料光學薄片係因可使太陽光集光成2倍以上 ，故可降低單元成本，因含有許多二氧化矽，橡膠加工性 優異。又，具有對於太陽光之高透明性，對於太陽光照射 之耐久性優異，故最適宜作爲集光型太陽光電池之有機材 料光學薄片。 201241060 [用以實施發明之形態]201241060 VI. Description of the Invention: [Technical Field] The present invention relates to an optical sheet of a concentrating solar cell. [Prior Art] In terms of a solar power generation panel, it is often used for the light-receiving surface of sunlight. A flat-panel way of a solar cell that is known as a unit. However, the solar cells that are covered by the light-receiving area are expensive, so it is difficult to reduce the cost of the solar power panel. From such a background, a light-collecting solar photovoltaic panel that collects light on the light-receiving surface of sunlight by a solar cell with a small diameter has been developed (Patent Document 1). This concentrating solar power panel is used to collect light hundreds of times, which greatly reduces the amount of solar cells used compared to the flat panel method. However, in a concentrating solar power generation panel in which light is collected hundreds of times, it is necessary to trace the sunlight to the direction of sunlight in two directions. And considering the use environment of this tracking stand outside the house, seeking for solidity, if it includes its installation cost, it will offset the cost advantage of significantly reducing the use of expensive solar cells. At present, in order to simplify the tracking of sunlight and to reduce the cost, the simple and lightweight collection of a Fresnel lens made of resin is used for the collecting lens with or without tracking. The development of light-type solar power panels is underway. In the case of a light guide plate for a backlight device for a touch-lighting device such as a mobile phone, it has been reported that it has a high transparency even if it contains cerium oxide -5-201241060 Polyoxyethylene rubber composition (Patent Document 2). A mechanism that collects light by arranging prismatic or trapezoidal members on the light receiving surface without tracking the sunlight in the direction of the sunlight. However, the material of the light collecting portion forming material such as the liquid type or the thermoplastic material can be used, and the steps in manufacturing the solar cell panel become complicated, and there is a problem that the cost rises (Patent Documents 3 to 4). Moreover, the structure in which the Fresnel lens is used as the collecting lens on the solar light receiving surface, and the position of the focus is between the collecting lens and the solar battery cell, and the light receiving surface of the battery is curved toward the collecting lens and curved into a concave shape has been used. Presented (Patent Document 5). Further, the enamel-type sheet is disposed on the light receiving surface of the sunlight, and the incident light from the outside is collected in the normal direction with respect to the light receiving surface, and then the light is reflected or refracted in a specific direction to be light-distributed, and further, the light is borrowed. It has been proposed to conduct light by total reflection and finally increase the energy density of incident light (Patent Document 6). In addition, the 'two-sided light-receiving type solar cell module has been proposed to be sealed on the both sides of the two-sided light-receiving solar cell unit (cell) through a light-transmissive adhesive and sealed by a light-transmissive glass plate. A two-sided light-receiving solar cell module (Patent Document 7); a method in which a position or an installation angle of a reference is not considered, and a unit of a double-sided light-receiving solar cell is easily used as a road marking device (Patent Document 8) or A method in which the glass sandwich type panel is provided on both the front surface and the back surface (Patent Document 9) and the like, but any of them is formed so as to be covered by the light receiving area can be said to be difficult to reduce the cost of the solar power generation panel. [Prior Art Document] -6-201241060 [Patent Document] [Patent Document 1] JP-A-2003-258291 (Patent Document 2) JP-A-2010-83978 (Patent Document 3) [Patent Document 5] Japanese Patent Laid-Open Publication No. JP-A No. Hei. No. Hei. No. Hei. JP-A-2004-60637 [Patent Document 9] Japanese Laid-Open Patent Publication No. JP-A No. No. 31-83834 [Draft of the Invention] [Summary of the Invention] [Problems to be Solved by the Invention] In order to solve the problem of global warming, the solar photovoltaic power generation panel has been widely used as a solution to the problem of global warming, and it is necessary to achieve a reduction in the cost of power generation caused by the system commercial power system. The cost is that the solar power panel is said to be 1 yen (Japanese yen) / Wp, and it is cheap to find a durable product with a material cost and a Fresnel lens shape. As the material of the Fresnel lens made of resin, acrylic resin, polymethyl methacrylate resin, or polycarbonate resin can be generally used. However, it is preferable to use a polyoxygen resin having a higher ultraviolet resistance than the general-purpose resin in the concentrating solar power generation panel which has been subjected to long-term durability for more than 20 years under sunlight. 201241060 When the i-oxygen resin is processed into a Fresnel lens or a 稜鏡 lens shape, the resin is injected into the mold by injection molding in the same manner as the acrylic resin used for general use, and the productivity of the product after molding is low. The processing process is carried out for production, so the productivity is low, and as a result, the manufacturing cost becomes high. For this reason, it is difficult to put a practical and lightweight concentrating solar power generation panel using a Fresnel lens or a 稜鏡 lens made of a resin. The present invention has been made in view of the above, and an object thereof is to provide an excellent durability against sunlight irradiation, such as a Fresnel sheet having a Fresnel lens shape, and a solar beam condensed in a normal direction of a Fresnel lens sheet. Therefore, before being incident on the ruthenium sheet, an organic material optical sheet which is used as a lenticular sheet or a lenticular lens sheet for aligning the incidence of sunlight in the normal direction can be used. Further, the present invention is an organic material optical sheet which can collect light on both sides of a light collecting type solar cell even if it is tracked or not tracked by one axis, and has excellent durability against sunlight irradiation, and is calendered compared to a liquid type. The material of the polyoxyxene resin which is excellent in molding and extrusion moldability, and which can easily process the shape of the solar concentrating portion, and the organic material optical sheet of the two-surface concentrating solar cell using the same. This organic material optical sheet can be utilized, for example, in a concentrating solar cell panel including a double-sided concentrating solar cell panel. [Means for Solving the Problem] The present invention provides an optical sheet for an organic material for a concentrating solar cell, in which a light-transmitting quadrangular prism having an isosceles trapezoidal cross section of 2 or more is connected in parallel to make the isosceles The parallel side of the trapezoid has two long sides. 201241060 The incident side faces of the corner posts are in the same plane, and sunlight is incident from the incident j-planes through the inside of the quadrangular prism and from the parallel two sides of the isosceles trapezoid The emission side surface of the rectangular column of the short side is emitted, and a part or all of the incident side surface is curved in order to collect light on the unit disposed on the emission side surface. The present invention provides an organic material optical sheet for a concentrating solar cell according to any one of claims 1 to 8, wherein the emission side surface is a joint surface, and the surface including the joint surface is used as a second conjugate light-collecting type of the second organic material optical sheet that is joined to the plane of symmetry, and the solar light is incident from the incident side surface, and passes through the inside of the square pillar from the parallel two sides of the isosceles trapezoid The exit side surface of the quadrangular prism having the short side is simultaneously incident on the second quadrangular prism, and passes through the inside of the second quadrangular prism and has a long side from the parallel two sides of the isosceles trapezoid of the cross section of the second quadrangular prism. The emission side surface of the second quadrangular prism is emitted, and a part of or all of the second emission side surface is a curved surface concentrating type in order to collect light on a unit disposed on the emission side surface of the second quadrangular prism. [Effects of the Invention] The organic material optical sheet of the concentrating solar cell including the double-sided concentrating solar cell of the present invention can reduce the unit cost by concentrating the solar light by twice or more, and contains many oxidizing agents.矽, rubber processing is excellent. Further, since it has high transparency to sunlight and is excellent in durability against sunlight, it is most suitable as an organic optical sheet for a concentrating solar cell. 201241060 [Formation for implementing the invention]
光學薄片較佳係使至少含有如下述（A ) 、( E C)及（D)而成之聚矽氧橡膠組成物硬化而得者； (A) 以下述平均組成式（I ) R*aSiO(4-a)/2 (I) (式中，R 1係表示相同或相異之非取代或取代一價 且一分子中之至少2個爲烯基，a爲1.95〜2.05之] 所示之聚合度爲100以上的有機聚矽氧烷100質量 (B) 比表面積超過200m2/g之煙霧質二氧< 〜1 5 0質量份、 (C) 於一分子中含有至少與2個矽原子鍵結 子的有機氫聚矽氧烷0.1〜30質量份、及 (D) 砂氫化（hydrosilylation)反應觸媒爲觸 較佳係0 · 1〜1 0質量份）。 此聚矽氧橡膠組成物係可押出成型、壓延成型 練型的材料，其硬化物係可含有二氧化矽，具有高 性，最適宜作爲含有兩面集光型太陽光電池之集光 光電池的光學薄片。 成分（A )係以平均組成式（I )所示之聚合度 以上的有機聚矽氧烷。平均組成式（I )中，R1表 或相異之非取代或取代的一價烴基，一般爲碳數1 尤宜爲碳數1〜8者。具體上可舉例如甲基、乙基 、丁基、己基、辛基等之烷基、環戊基、環己基等 基、乙烯基、烯丙基、丙烯基等之烯基、環烯基、 烴基， E數） 份、 匕矽 70 之氫原 媒量（ 等之混 的透明 型太陽 爲 10 0 示相同 〜1 2， 、丙基 之環烷 苯基、 -10- 201241060 甲苯基等之芳基、苯甲基、2 -苯基乙基等之芳烷基、或 此等之基的氫原子之一部分或全部以鹵素原子或氰基等取 代之基，宜爲甲基、乙烯基、苯基、三氟丙基，尤宜爲甲 基、乙烯基。 成分（A)具體上適宜爲該有機聚矽氧烷之主鏈爲由 二甲基矽氧烷單元之重複所構成者；或由構成此主鏈之二 甲基矽氧烷單元之重複所構成之二甲基聚矽氧烷構造的一 部分上導入具苯基、乙烯基、3，3,3 -三氟丙基等之二苯基 矽氧烷單元、甲基苯基矽氧烷單元、甲基乙烯基矽氧烷單 元、或甲基-3，3,3 -三氟丙基矽氧烷單元等而成者》 尤其有機聚矽氧烷係宜於1分子中具有2個以上之烯 基、環烯基等之脂肪族不飽和基者，尤宜爲乙烯基。此時 ，宜全R1中0.01〜20莫耳％，尤宜0.02〜10莫耳％爲脂 肪族不飽和基。又，此脂肪族不飽和基係可於分子鏈末端 鍵結於矽原子，亦可鍵結於分子鏈中間之矽原子，亦可爲 兩者，但宜至少鍵結於分子鏈末端之矽原子。又，a爲 1.95〜2.05，宜爲1.98〜2_02，尤宜爲1.99〜2.01之正數 〇 就成分（A)之有機聚矽氧烷而言，更佳係在平均組 成式（I )中之R1爲碳數1〜6的一價烴基，且一分子中 之至少2個爲烯基。 成分（A)之有機聚矽氧烷較佳係可舉例如分子鏈末 端被三甲基矽烷氧基、二甲基苯基矽烷氧基、二甲基羥基 矽烷氧基、二甲基乙烯基矽烷氧基、甲基二乙烯基矽烷氧 -11 - 201241060 基、三乙烯基矽烷氧基等之三有機矽烷氧基封端者。 尤佳者可舉例如甲基乙烯基聚矽氧烷、甲基苯基乙烯 基聚矽氧烷、甲基三氟丙基乙烯基聚矽氧烷等。 如此之有機聚矽氧烷係例如可藉由使有機鹵素矽烷之 1種或2種以上（共）水解縮合，或使環狀聚矽氧烷（矽 氧烷之3量體、4量體等）使用鹼性或酸性之觸媒而開環 聚合而得到。此等係基本上爲直鏈狀之二有機聚矽氧烷， 但成分（A)係可爲分子量（聚合度）或分子構造相異之 2種或3種以上的混合物。 有機聚矽氧烷之聚合度爲1〇〇以上，宜爲100〜 100000，尤宜爲3000〜20000。又，此聚合度係可以凝膠 滲透色層（GPC )分析所得到之聚苯乙烯換算的重量平均 聚合度而測定。 成分（B)係BET比表面積超過200m2/g之煙霧質 二氧化矽。此補強性二氧化矽係爲得到透明性優，又，機 械性強度優異之橡膠組成物所添加。又，爲提昇聚矽氧橡 膠組成物之透明性，必須BET比表面積超過200m2/ g， 較佳係250m2/g以上。若BET比表面積爲200m2/g以 下，硬化物之透明降低。 一般，可使用於聚矽氧橡膠組成物之二氧化矽係可舉 例如煙霧質二氧化矽、沈降二氧化矽等，但若使用沈降二 氧化矽，透明性降低，故可使用煙霧質二氧化矽。煙霧質 二氧化矽係亦可直接使用，但宜經表面處理者。亦可適宜 使用以氯矽烷、烷氧基矽烷或六甲基二矽氮烷等疏水化處 -12- 201241060 理煙霧質二氧化矽之表面者。尤宜以六甲基矽氮烷之處理 ，透明性變高，佳。 成分（B)之煙霧質二氧化矽的添加量係相對於成分 (A)之有機聚矽氧烷100質量份，爲70〜150質量份。 若未達70質量份，使聚矽氧橡膠摻混物硬化之薄片的透 明性降低。若超過150質量份，二氧化矽於聚矽氧聚合物 中很難分散。 成分（C)係於一分子中含有至少與2個矽原子鍵結 之氫原子的有機氫聚矽氧烷。此有機氫聚矽氧烷係於一分 子中含有至少與2個矽原子鍵結之氫原子（SiH基）者， 較佳係可適用以下述平均組成式（II ) R2b Hc S i Ο(4-b-c)/2 ( II ) (上式中’ R2爲碳數1〜6之取代或非取代的一價烴基，b 爲0_7〜2.1之數’ c爲0·18〜1·0之數，且b + c爲滿足0.8 〜3.0 ) 所示之自以往公知的有機氫聚矽氧烷。 R2爲碳數1〜6之取代或非取代的一價烴基，較佳係 不具有脂肪族不飽和鍵者，可舉例如甲基、Ig、胃基、 丁基、戊基、己基等之烷基、環己基、環己輝基、苯基等 之非取代的一價烴基、或3,3,3 -三氟丙基、氰甲基等之 上述一價煙基的氫原子之至少一部分被園素原子或氰基取 代之取代烷基等之取代的一價烴基。 有關b與c’較佳係b爲0.8〜2.0之數，c爲〇.2〜 1.0之數，且b + c爲滿足1.0〜2.5。 -13- 201241060 成分（c)之有機氫聚矽氧烷的分子構造係可爲直鏈 狀、環狀、分枝狀、三次兀網目狀之任~者的構造。此時 ，適宜使用一分子中之矽原子的數（或聚合度）爲2〜300 個、尤其4〜200個在室溫下爲液狀者。又，鍵結於矽原 子之氫原子（S i Η基）係可位於分子鏈末端，亦可位於側 鏈，亦可在於其兩者，可使用一分子中至少含有2個（一 般爲2〜300個）、較佳係3個以上（例如3〜200個）， 更佳係4〜150個左右者。 就成分（C)之有機氫聚矽氧烷而言，具體上係可舉 例如1，1，3,3 -四甲基二矽氧烷、1，3,5,7 -四甲基環四矽氧 烷、甲基氫環聚矽氧烷、甲基氫矽氧烷•二甲基矽氧烷環 狀共聚物、參（二甲基氫矽烷氧基）甲基矽烷、參（二甲 基氫矽烷氧基）苯基矽烷、兩末端三甲基矽烷氧基封端甲 基氫聚矽氧烷、兩末端三甲基矽烷氧基封端二甲基矽氧烷 •甲基氫矽氧烷共聚物、兩末端二甲基氫矽烷氧基封端二 甲基聚矽氧烷、兩末端二甲基氫矽烷氧基封端二甲基矽氧 烷•甲基·氫矽氧烷共聚物、兩末端三甲基矽烷氧基封端甲 基氫矽氧烷•二苯基矽氧烷共聚物、兩末端三甲基矽烷氧 基封端甲基氫矽氧烷•二苯基矽氧烷•二甲基矽氧烷共聚 物、環狀甲基氫聚矽氧烷、環狀甲基氫矽氧烷.二甲基矽 氧院共聚物、環狀甲基氣砂氧院.二苯基砂氧院.二甲基 矽氧烷共聚物、（CH3)2HSiOl/2單元與Si04/2單元所構成之 共聚物、（CH3)2HSi〇1/2 單元與 si〇4/2 單元與（C6H5)Si〇3/2 單元所構成之共聚物等或上述各例示化合物中，甲基之一 -14- 201241060 部分或全部被乙基、丙基等其他之烷基或苯基等之芳基取 代者。 成分（C)之有機氫聚矽氧烷的摻合量係相對於成分 (A)之有機聚矽氧烷100質量份，宜爲0.1〜30質量份 ’更宜0.1〜10質量份，尤宜爲〇.3〜10質量份。 又’成分（C)之有機氫聚矽氧烷係以鍵結於成分（C )中之矽原子的氫原子（亦即SiH基）對鍵結於成分（A )中之矽原子的烯基之莫耳比，較佳係0.5〜5莫耳/莫 耳，更佳係0.8〜4莫耳/莫耳，最佳係1〜3莫耳/莫耳 之量慘合。 成分（D)之矽氫化反應觸媒係可適用公知者，可舉 例如鉑黑、氯化第二鈾、氯化鉑酸、氯化鉑酸與一價醇之 反應物、氯化鉑酸與烯烴類之錯合物、鉑雙乙醯乙酸酯等 之鉑系觸媒、鈀系觸媒、铑系觸媒等。 成分（D)之矽氫化反應觸媒之摻合量係可爲觸媒量 ，一般，就鉑族金屬而言，相對於（A )成分100質量份 ，爲0.1〜10質量份。 至少含有成分（A)〜（D)而成之聚矽氧橡膠組成 物係在上述成分以外，在無損本發明之目的之範圍，可添 加耐燃性賦予劑、或著色劑等。 聚矽氧橡膠組成物係可藉由使上述之成分的特定量以 2根輥、捏合機、萬馬力（B a n b u r y )混合機等進行混練而 得到。 成形聚矽氧橡膠組成物時’成形方法係無特別限定， -15- 201241060 但可爲沖壓成型、押出成型、壓延成型等。 聚矽氧橡膠組成物之硬化條件係無特別限定’ 一般係 可藉由80〜3 00°C、尤其1〇〇〜250°C加熱硬化5秒〜1小 時，尤其30秒〜30分鐘俾得到按鍵。又’亦可以1〇〇〜 2 0 0 °C後熟化1 〇分〜1 〇小時左右。 聚矽氧橡膠組成物係以沖壓成型等之方法成形、硬化 ，俾得到高透明的聚矽氧橡膠之光學薄片。 此光學薄片係宜厚度2mm之硬化物薄片的全光線穿 透率就結晶矽之分光感度區域的〇 · 3 5毫米〜1 · 1 5毫米之 波長爲90%以上。具體上係以Suga試驗機公司製直讀霾 度電腦HGM - 2的測定値較佳係90%以上。若此全光線穿 透率未達90%，有時光擴散太大，而入射光不能達到光學 薄片之最遠部。此光學薄片係厚度2mm之硬化物薄片的 霾値（霧價）以Suga試驗機公司製直讀霾度電腦HGM -2的測定値爲1 0以下，尤宜8以下。該霾値（霧價）超過 10時，有時光擴散太大，而入射光有時會不能達到光學薄 片之最遠部。 說明有關以太陽光的照射光譜0.3 5〜1.15毫米的波長 爲穿透率爲90%以上（厚度2mm時）的橡膠組成物硬化 而成之薄片製作含兩面集光型太陽光電池之集光型太陽光 電池的有機材料光學薄片之情形。在集光型太陽光電池中 係爲了有效率地取入太陽光的直達光，必須考量南中高度 每一季節變動，而在本發明中製作朝—軸方向形成本發明 之形狀（參照圖面）的光學薄片。南中高度係必須考量以 -16- 201241060 春分、秋分爲起點而於夏至+23度、在冬至_23 但若依本發明之光學薄片的形狀，對於23度之 而在射出側係可入射於約太陽光電池的受光面， 學光學軟體（Light tools)而確認。繼而，對於光 之太陽光總入射面積，確認出對太陽光電池之總入 爲2.7對1.0。在本發明之實施中，係不須朝向 太陽之追蹤系統。以具有本發明之簡單重複的線狀 狀之線性光學薄片1片，可實現2.7倍集光。藉本 可提供一種對於南中光度的偏差±23度之直達光， 2倍之集光度的光學薄片。 將使用光學薄片之集光型太陽光電池的一例之 表示於圖1中，將立體圖表示於圖2中。光學薄片 截面爲等腰梯形之2以上的光穿透性四角柱並聯連 使該等腰梯形的平行2邊之中具有長邊之四角柱的 面成爲同一平面，太陽光從該入射側面入射，通過 (等腰梯形）的內部而從等腰梯形的平行2邊之中 邊之四角柱的射出側面射出，爲了集光於被配置在 面之單元2而使入射側面3的一部分或全部爲曲面 一般爲朝向入射光而突出者。 從入射側面入射之太陽光係使光學薄片1透過 學薄片內反射，而集光於被設置在射出側面之太陽 單元2。 具體上構成爲模組時，例如，如圖3所示，爲 薄片1固定單元2，使用聚碳酸酯或丙烯酸等之樹 變化， 向入射 用幾何 學薄片 射面積 光面的 構造形 發明， 可超過 截面圖 1係使 結，以 入射側 四角柱 具有短 射出側 。曲面 或在光 光電池 於光學 脂製的 -17- 201241060 單元薄片固定治具5。此時所使用之單元較佳係由多結晶 或單結晶矽所製作。又，此單元爲短柵狀之形狀，可舉例 如澳洲之Origin Energy公司製Sliver Cell (註冊商標） 。另外’此短柵狀之單元係可藉切片等之方法加工一般之 太陽光電池。又，各別之單元係至少形成藉另一個單元與 捲帶線而串聯或並聯結合並用以供給電力之電氣回路（專 利文獻3)。又，於光學薄片丨與單元2之間隙較佳係可 添加具有與光學薄片1相同之折射率的聚矽氧油或聚矽氧 凝膠以防止太陽光的散反射或雙折射。進一步，較佳係爲 防止光學薄片1之污染，可於光入射側配置白板強化玻璃 4等。另外，單元薄片固定治具5進一步在與光入射面相 反側較佳係可配置支撐薄片或強化玻璃6。 從入射側面入射之太陽光的焦點較佳係形成於等腰梯 形之中或射出側面之後方。圖1係太陽光之焦點爲等腰梯 形之中形成於射出側面者，於射出側面係配置單元2。 太陽光垂直地入射於入射側面時係如示於圖4之光學 薄片Η，太陽光入射側面之曲面（例如，圓形之一部分或 橢圓形之一部分的形狀）更佳係入射時之太陽光的焦點爲 形成於較射出側面（等腰梯形之平行二邊中含短邊之側面 )更後方的曲面。 所入射之太陽光的焦點若形成於等腰梯形中亦即等腰 梯形之平行二邊中包含長邊且較射出側面更靠入射側面側 ，入射光入射於等腰梯形之側壁（具有等腰梯形之平行二 邊以外之邊的側面）時的入射角小於臨界角，因不全反射 • 18 201241060 而射出於光學薄片外，到達太陽光電池單元之太陽光變少 ，有時無助於有效之發電。於等腰梯形中產生之焦點的態 樣係如示於圖5(A)之光學薄片21般，於等腰梯形中產 生1個焦點時，如圖5(B)與（C)之光學薄片31與41 所示般，有時產生複數之焦點偏移。 從入射側面入射之太陽光較佳係可通過等腰梯形之中 而直接射出，或於等腰梯形之中一次全反射後被射出。 圖4係表示入射光垂直地入射於入射側面，入射光係 於光學薄片內未反射而直接到達射出側面。又圖6係表示 從入射側面以23度入射時之太陽光，於光學薄片51之等 腰梯形中一次全反射後被射出。 太陽光入射側面之一部分或全部的曲面較佳係入射時 之太陽光的焦點可形成於較射出側面（等腰梯形之平行二 邊中含短邊之側面）更後方的曲面。太陽光入射側面係全 部可爲例如具圓形之一部分或橢圓形之一部分的形狀之全 部曲面，但較佳係使此曲面之突出部以平行於四角柱之截 面的等腰梯形平行2邊之平面（Flat)部取代，爲平面部 與曲面部之組合的一部分曲面。圖7係表示太陽光入射側 面爲曲面與平面部之組合的形狀之例。圖7之太陽光入射 側面63係曲面部63c、與平行於等腰梯形之平行2邊的平 面部63f之組合。形成爲於光入射側配置白板強化玻璃等 之構成時，僅曲面係可使白板強化玻璃以點或線支撐，故 有可能薄片因以白板強化玻璃之重量變形。但，藉由組合 曲面與平面部，可以平面部支撐白板強化玻璃，可降低薄 -19- 201241060 片因以白板強化玻璃之重量變形之可能性。 圖8係表示在使太陽光入射側面之一部分形成平面的 光學薄片中，與圖面6同樣地太陽光以23度入射於入射 側面，入射光於光學薄片內全反射而到達射出側面之例。 將使用光學薄片之兩面集光型太陽光電池的一例表示 於圖9中，立體圖表示於圖10中。此光學薄片係使上述 之光學薄片的截面之等腰梯形的平行2邊之中具有短邊之 面作爲接合面，使含有該接合面之面作爲對稱面而成爲面 對稱般組合完全相同之第2光學薄片之兩面集光型，太陽 光從入射側面入射，通過第1四角柱的內部而從第1等腰 梯形的平行2邊之中具有短邊之四角柱的射出側面射出， 同時地入射於第2四角柱，通過第2四角柱之內部而從第 2四角柱之截面的等腰梯形之平行2邊之中具有長邊之第 2四角柱的射出側面射出，爲了集光於被配置在第2四角 柱的射出側面之單元而使第2射出側面的一部分或全部作 爲曲面之兩面集光型。 從入射側面入射之太陽光係使經組合之光學薄片透過 或在經組合之光學薄片內反射，而集光於被設置在射出側 面之太陽光電池單元。 從入射側面入射時之太陽光的焦點較佳係形成於第2 等腰梯形之中或射出側面之後方。圖9係太陽光之焦點爲 等腰梯形之中形成於射出側面者，於射出面係配置單元。 【實施方式】 -20- 201241060 [實施例] 以下，藉實施例與比較例具體地說明本 明係不限定於以下之實施例。又，重量平均 平均聚合度係凝膠滲透色層（GPC )分析之 値。 實施例1Preferably, the optical sheet is obtained by hardening a polyoxyxene rubber composition containing at least (A), (EC) and (D) below; (A) having the following average composition formula (I) R*aSiO ( 4-a)/2 (I) (wherein R 1 represents the same or different unsubstituted or substituted monovalent and at least 2 of the molecules are alkenyl, a is 1.95 to 2.05] 100% by mass of the organic polyoxane having a degree of polymerization of 100 or more (B) a fumed oxyhydroxide having a specific surface area of more than 200 m 2 /g < 〜150 parts by mass, (C) containing at least two ruthenium atoms in one molecule 0.1 to 30 parts by mass of the bonded organic hydrogen polyoxyalkylene, and (D) a hydrosilylation reaction catalyst is preferably 0.1 to 10 parts by mass. The polyoxymethylene rubber composition can be extruded and calendered, and the cured product can contain cerium oxide, which is highly suitable, and is most suitable as an optical sheet of a light collecting photovoltaic cell containing a two-sided concentrating solar cell. . The component (A) is an organopolysiloxane having an average degree of polymerization or more represented by the formula (I). In the average composition formula (I), the unsubstituted or substituted monovalent hydrocarbon group of R1 or the like is generally a carbon number of 1 and particularly preferably a carbon number of 1 to 8. Specific examples thereof include an alkyl group such as a methyl group, an ethyl group, a butyl group, a hexyl group or an octyl group; a group such as a cyclopentyl group or a cyclohexyl group; an alkenyl group such as a vinyl group, an allyl group or a propenyl group; or a cycloalkenyl group; Hydrocarbyl group, E number) part, 氢70 hydrogen source amount (the mixed transparent sun is 10 0 shows the same ~1 2, propyl cycloalkanyl group, -10- 201241060 tolyl group, etc. a group in which an aralkyl group such as a benzyl group or a 2-phenylethyl group, or a hydrogen atom of a group or the like is partially or wholly substituted with a halogen atom or a cyano group, and is preferably a methyl group, a vinyl group or a benzene group. a group, a trifluoropropyl group, particularly preferably a methyl group or a vinyl group. The component (A) is specifically such that the main chain of the organopolyoxane is composed of a repeat of a dimethyloxane unit; a part of the dimethyl polyoxymethane structure constituting the repeat of the dimethyloxane unit constituting the main chain is introduced into a diphenyl group having a phenyl group, a vinyl group, a 3,3,3-trifluoropropyl group or the like. a methoxy olefin unit, a methylphenyl siloxane unit, a methyl vinyl siloxane unit, or a methyl-3,3,3-trifluoropropyl fluorene unit In particular, the organic polyoxyalkylene is preferably an aliphatic unsaturated group having two or more alkenyl groups, cycloalkenyl groups or the like in one molecule, and particularly preferably a vinyl group. In this case, it is preferable to use 0.01% of all R1. 20 mol%, especially 0.02~10 mol% is an aliphatic unsaturated group. Further, the aliphatic unsaturated group may be bonded to a deuterium atom at the end of the molecular chain, or may be bonded to the middle of the molecular chain. The atom may also be both, but it is preferably bonded to at least the ruthenium atom at the end of the molecular chain. Further, a is 1.95 to 2.05, preferably 1.98 to 2_02, and particularly preferably a positive number of 1.99 to 2.01. In the case of the organopolyoxyalkylene, it is more preferred that R1 in the average composition formula (I) is a monovalent hydrocarbon group having 1 to 6 carbon atoms, and at least two of the molecules are alkenyl groups. The organic polyoxane is preferably, for example, a terminal of a molecular chain by a trimethyldecyloxy group, a dimethylphenyl alkoxy group, a dimethylhydroxydecyloxy group, a dimethylvinyl alkoxy group, or a methyl group. a trivinylnonaneoxy-11 - 201241060 base, a trivinyldecyloxy group or the like, a triorganodecyloxy endblocker. Vinyl polyoxyalkylene, methylphenylvinyl polyoxyalkylene, methyltrifluoropropylvinylpolyoxyalkylene, etc. Such an organic polyoxyalkylene can be, for example, made of an organic halogen decane The above-mentioned two or more (co)hydrolyzed condensations are obtained, or a cyclic polysiloxane (a trioxane or a tetradentate or the like) is obtained by ring-opening polymerization using a basic or acidic catalyst. It is a substantially linear diorganopolyoxyalkylene, but the component (A) may be a mixture of two or more kinds of molecular weight (degree of polymerization) or molecular structure. Polymerization of organic polyoxyalkylene. The degree is 1 〇〇 or more, preferably 100 to 100000, particularly preferably 3,000 to 20,000. Further, the degree of polymerization can be determined by polystyrene-equivalent weight average polymerization degree obtained by gel permeation chromatography (GPC) analysis. . The component (B) is a fumed cerium oxide having a BET specific surface area of more than 200 m 2 /g. This reinforcing cerium oxide is added to a rubber composition which is excellent in transparency and excellent in mechanical strength. Further, in order to enhance the transparency of the polyoxyethylene rubber composition, the BET specific surface area must be more than 200 m2/g, preferably 250 m2/g or more. If the BET specific surface area is 200 m2/g or less, the transparency of the cured product is lowered. In general, the cerium oxide used for the polyoxyethylene rubber composition may, for example, be a fumed cerium oxide or a precipitated cerium oxide. However, if sedimentation of cerium oxide is used, transparency is lowered, so that smog dioxide can be used. Hey. Asphalt bismuth dioxide can also be used directly, but should be surface treated. It is also suitable to use a surface of a hydrophobized -12-201241060, such as chlorodecane, alkoxy decane or hexamethyldioxane. Especially suitable for the treatment of hexamethylguanidinium, the transparency becomes higher and better. The amount of the aerosol-type cerium oxide added to the component (B) is 70 to 150 parts by mass based on 100 parts by mass of the organopolysiloxane of the component (A). If it is less than 70 parts by mass, the transparency of the sheet which hardens the polyoxyethylene rubber blend is lowered. If it exceeds 150 parts by mass, cerium oxide is difficult to disperse in the polyoxyl polymer. The component (C) is an organohydrogenpolyoxyalkylene having a hydrogen atom bonded to at least two deuterium atoms in one molecule. The organohydrogenpolyoxyalkylene is a hydrogen atom (SiH group) having at least two ruthenium atoms bonded in one molecule, and is preferably applicable to the following average composition formula (II) R2b Hc S i Ο (4) -bc)/2 ( II ) (In the above formula, ' R 2 is a substituted or unsubstituted monovalent hydrocarbon group having a carbon number of 1 to 6, and b is a number of 0-7 to 2.1' c is a number of 0·18 to 1·0, Further, b + c is a conventionally known organic hydrogen polyoxyalkylene as shown in the range of 0.8 to 3.0. R 2 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 6 carbon atoms, preferably not having an aliphatic unsaturated bond, and examples thereof include an alkyl group, an Ig group, a gastric group, a butyl group, a pentyl group, a hexyl group and the like. At least a part of the hydrogen atom of the above-mentioned monovalent nicotyl group such as an unsubstituted monovalent hydrocarbon group such as a cyclyl group, a cyclohexyl group, a cyclohexyl group or a phenyl group, or a 3,3,3-trifluoropropyl group or a cyanomethyl group A monovalent hydrocarbon group substituted with a substituted atom such as a halogen atom or a cyano group. Preferably, b and c' are b to a number of 0.8 to 2.0, c is a number of 〇.2 to 1.0, and b + c is 1.0 to 2.5. -13- 201241060 The molecular structure of the organohydrogenpolyoxane of the component (c) may be a linear, cyclic, branched or tertiary network. In this case, it is preferred to use a number (or degree of polymerization) of ruthenium atoms in one molecule of 2 to 300, particularly 4 to 200, which is liquid at room temperature. Further, the hydrogen atom (S i Η group) bonded to the ruthenium atom may be located at the end of the molecular chain, or may be located in the side chain, or both, and at least two molecules may be used in one molecule (generally 2 to 2). 300), preferably more than 3 (for example, 3 to 200), and more preferably 4 to 150 or so. The organic hydrogen polyoxyalkylene of the component (C) may specifically be, for example, 1,1,3,3-tetramethyldioxane or 1,3,5,7-tetramethylcyclotetra Alkoxysilane, methylhydrocyclopolyoxyalkylene, methylhydroquinone/dimethyl oxane cyclic copolymer, ginseng (dimethylhydroquinoloxy)methyl decane, ginseng (dimethyl Hydroquinoloxy)phenylnonane, two-terminal trimethyldecaneoxy-terminated methylhydrogenpolyoxane, two-terminal trimethyldecaneoxy-terminated dimethyloxane, methylhydroquinone Copolymer, two-terminal dimethylhydroquinoloxy-terminated dimethyl polyoxane, two-terminal dimethylhydroquinoloxy-terminated dimethyloxane, methyl-hydroquinone copolymer, Two-terminal trimethyldecaneoxy-terminated methylhydroquinone-diphenyl decane copolymer, two-terminal trimethyldecaneoxy-terminated methylhydroquinone-diphenyl decane Dimethyl methoxide copolymer, cyclic methyl hydrogen polyoxy siloxane, cyclic methyl hydrazine, dimethyl oxime copolymer, cyclic methyl shale, diphenyl sand Oxygen Institute. Dimethyl decane copolymer, (CH 3) a copolymer of 2HSiOl/2 unit and Si04/2 unit, a copolymer of (CH3)2HSi〇1/2 unit and si〇4/2 unit and (C6H5)Si〇3/2 unit, or In each of the above-exemplified compounds, part or all of methyl group-14 to 201241060 is substituted with an aryl group such as an ethyl group or a propyl group or an aryl group such as a phenyl group. The blending amount of the organohydrogenpolyoxane of the component (C) is preferably 0.1 to 30 parts by mass, more preferably 0.1 to 10 parts by mass, based on 100 parts by mass of the organopolysiloxane of the component (A). It is 3. 3 to 10 parts by mass. Further, the organic hydrogen polyoxyalkylene of the component (C) is a hydrogen atom bonded to the halogen atom of the component (A) by a hydrogen atom (i.e., a SiH group) bonded to the halogen atom in the component (C). The molar ratio is preferably 0.5 to 5 moles/mole, more preferably 0.8 to 4 moles/mole, and the best system is 1 to 3 moles/mole. The hydrogenation reaction catalyst system of the component (D) can be suitably used, and examples thereof include platinum black, second uranium chloride, chloroplatinic acid, a reaction of chloroplatinic acid with a monovalent alcohol, and a platinum chloride acid. A olefin-based complex, a platinum-based catalyst such as platinum acetoacetate, a palladium-based catalyst, or a ruthenium-based catalyst. The blending amount of the hydrogenation reaction catalyst of the component (D) may be a catalyst amount, and is generally 0.1 to 10 parts by mass based on 100 parts by mass of the platinum group metal in the platinum group metal. The polyoxyethylene rubber composition containing at least the components (A) to (D) may be added to the above-mentioned components in addition to the above-mentioned components, and a flame resistance imparting agent or a coloring agent may be added. The polyoxyxene rubber composition can be obtained by kneading a specific amount of the above components by two rolls, a kneader, a wanage force (B a n b u r y ) mixer or the like. The forming method is not particularly limited, and the molding method is not limited to -15 to 201241060, but may be press molding, extrusion molding, calender molding, or the like. The curing conditions of the polyoxyethylene rubber composition are not particularly limited. Generally, it can be heat-hardened by 80 to 300 ° C, especially 1 to 250 ° C for 5 seconds to 1 hour, especially 30 seconds to 30 minutes. button. Also, you can also cook 1 〇〇~2 0 0 °C and then mature for 1 〜 minutes~1 〇 hours. The polyoxymethylene rubber composition is formed and hardened by a method such as press molding, and an optical sheet of highly transparent polyoxyxene rubber is obtained. The optical sheet preferably has a total light transmittance of a cured sheet having a thickness of 2 mm. The wavelength of the sensitized region of the crystallization is 3 · 35 mm 〜 1 · 15 mm and the wavelength is 90% or more. Specifically, the measurement by the Suga test machine company direct reading computer HGM-2 is preferably more than 90%. If the total light transmittance is less than 90%, sometimes the light diffusion is too large, and the incident light cannot reach the farthest portion of the optical sheet. The enthalpy (fog price) of the cured sheet of the optical sheet having a thickness of 2 mm is 10 or less, and particularly preferably 8 or less, as measured by the Suga Test Machine Co., Ltd. direct reading computer HGM-2. When the enthalpy (fog price) exceeds 10, the light diffusion is sometimes too large, and the incident light sometimes cannot reach the farthest portion of the optical sheet. A concentrating solar cell including a two-sided concentrating solar cell is prepared by squeezing a rubber composition having a wavelength of 0.3 5 to 1.15 mm and a transmittance of 90% or more (when the thickness is 2 mm). The case of optical sheets of organic materials. In the concentrating solar cell, in order to efficiently take in the direct light of the sunlight, it is necessary to consider the variation of the south-central height every season, and in the present invention, the shape of the present invention is formed in the direction of the axis (see the drawing). Optical sheet. The south-central height system must take into account the peaks of -16-201241060, the autumn is divided into the starting point, the summer solstice is +23 degrees, and the winter solstice _23. However, according to the shape of the optical sheet according to the present invention, it can be incident on the exit side for 23 degrees. It is confirmed by the light-receiving surface of the solar cell and the optical tools. Then, for the total incident area of the sunlight, it was confirmed that the total input to the solar cell was 2.7 to 1.0. In the practice of the present invention, it is not necessary to face the tracking system of the sun. With a linear optical sheet having a simple repeating linear shape of the present invention, 2.7 times light collection can be achieved. By means of the present invention, it is possible to provide an optical sheet having a direct light of ±23 degrees for the luminosity of the south and a luminosity of 2 times. An example of a concentrating solar cell using an optical sheet is shown in Fig. 1, and a perspective view is shown in Fig. 2. The light-transmissive four-corner column having two or more isosceles trapezoidal cross-sections is connected in parallel so that the faces of the four corners having the long sides among the parallel two sides of the isosceles trapezoid are in the same plane, and sunlight is incident from the incident side. The inside of the four corners of the parallel two sides of the isosceles trapezoid is emitted from the inside of the square (the isosceles trapezoid), and a part or all of the incident side faces 3 are curved in order to collect the light on the unit 2 disposed on the surface. Generally it is highlighted toward the incident light. The sunlight incident from the incident side causes the optical sheet 1 to be reflected by the inside of the sheet, and is collected by the solar unit 2 provided on the exit side. Specifically, when the module is configured as a module, for example, as shown in FIG. 3, the sheet 1 fixing unit 2 is in the form of a structure in which a tree such as polycarbonate or acrylic is changed, and the surface is incident on the geometric sheet. Exceeding the cross-sectional view 1 is a knot, and the entrance side quadrangular post has a short exit side. Surface or in photocells in optical grease -17- 201241060 unit sheet fixing fixture 5. The unit used at this time is preferably made of polycrystalline or single crystal ruthenium. Further, the unit has a short grid shape, and may be, for example, Sliver Cell (registered trademark) manufactured by Origin Energy of Australia. In addition, the short grid-like unit can process a general solar cell by means of slicing or the like. Further, the respective units form at least an electric circuit for supplying electric power by means of another unit and a take-up reel in series or in parallel (Patent Document 3). Further, in the gap between the optical sheet bundle and the unit 2, it is preferable to add a polyphosphonium oxide or a polyoxymethylene gel having the same refractive index as that of the optical sheet 1 to prevent scattering or birefringence of sunlight. Further, it is preferable to prevent the contamination of the optical sheet 1 and to arrange the white plate tempered glass 4 or the like on the light incident side. Further, the unit sheet fixing jig 5 is further preferably provided with a supporting sheet or tempered glass 6 on the opposite side to the light incident surface. The focus of the sunlight incident from the incident side is preferably formed in the isosceles trapezoid or after the exit side. Fig. 1 is a view showing that the focus of the sunlight is formed on the side of the exit in the isosceles ladder shape, and the side surface arrangement unit 2 is emitted. When the sunlight is incident perpendicularly on the incident side, it is as shown in the optical sheet 图 of FIG. 4, and the curved surface of the incident side of the sunlight (for example, the shape of one part of a circle or a part of an ellipse) is better than the sunlight at the time of incidence. The focus is a curved surface formed further rearward than the side of the exit (the side having the short side of the parallel sides of the isosceles trapezoid). The focal point of the incident sunlight is formed in the isosceles trapezoid, that is, the parallel sides of the isosceles trapezoid include the long side and the side of the incident side is closer to the incident side, and the incident light is incident on the side wall of the isosceles trapezoid (having isosceles The incident angle at the side of the side other than the two sides of the trapezoid is smaller than the critical angle. Because of the incomplete reflection, 18 201241060, when it is shot outside the optical sheet, the amount of sunlight reaching the solar cell unit is small, sometimes it does not contribute to effective power generation. . The pattern of the focus generated in the isosceles trapezoid is as shown in the optical sheet 21 of FIG. 5(A), and when one focus is produced in the isosceles trapezoid, as shown in FIGS. 5(B) and (C). As shown in 31 and 41, a complex focus shift sometimes occurs. The sunlight incident from the incident side surface is preferably directly emitted through the isosceles trapezoid, or is emitted after one total reflection in the isosceles trapezoid. Fig. 4 is a view showing that incident light is incident perpendicularly on the incident side surface, and the incident light is not reflected in the optical sheet and directly reaches the emission side surface. Further, Fig. 6 shows sunlight which is incident at 23 degrees from the incident side surface, and is totally reflected once in the isosceles trapezoid of the optical sheet 51. It is preferable that a part or all of the curved surface of the incident side of the sunlight is formed such that the focus of the sunlight at the time of incidence can be formed on the curved surface further rearward than the side of the exit side (the side including the short side of the parallel sides of the isosceles trapezoid). All of the incident side surfaces of the sunlight may be, for example, all curved surfaces having a shape of one of a circular portion or a portion of an elliptical shape, but it is preferable that the protruding portion of the curved surface is parallel to the two sides of the isosceles trapezoid parallel to the cross section of the quadrangular prism. The flat portion is replaced by a part of the curved surface of the combination of the flat portion and the curved portion. Fig. 7 is a view showing an example in which the incident side of the sunlight is a combination of a curved surface and a flat portion. The sunlight incident side surface 63 of Fig. 7 is a combination of a curved surface portion 63c and a flat surface portion 63f parallel to the two sides of the isosceles trapezoid. When the white plate tempered glass or the like is disposed on the light incident side, the white plate tempered glass can be supported by dots or wires only by the curved surface. Therefore, the sheet may be deformed by the weight of the white tempered glass. However, by combining the curved surface and the flat portion, the whiteboard tempered glass can be supported at the flat portion, which can reduce the possibility that the thin -19-201241060 sheet is deformed by the weight of the white tempered glass. Fig. 8 is a view showing an example in which, in the optical sheet in which one side of the incident side surface of the sunlight is formed, the sunlight is incident on the incident side surface at 23 degrees, and the incident light is totally reflected in the optical sheet to reach the emission side surface. An example of a two-side concentrating solar cell using an optical sheet is shown in Fig. 9, and a perspective view is shown in Fig. 10. In the optical sheet, the surface having the short side among the parallel sides of the isosceles trapezoid in the cross section of the optical sheet is used as the joint surface, and the surface including the joint surface is the same as the plane of symmetry. (2) The light collecting type on both sides of the optical sheet, the sunlight is incident from the incident side surface, and is emitted from the exit side surface of the quadrangular prism having the short side among the parallel two sides of the first isosceles trapezoid through the inside of the first quadrangular prism, and is incident at the same time. In the second quadrangular prism, the second side of the second quadrangular prism is projected from the side of the second quadrangular prism having the long side among the parallel two sides of the isosceles trapezoid in the cross section of the second quadrangular prism, and is arranged for collecting light. A part or all of the second emission side surface is a light collecting type on both sides of the curved surface in the unit of the exit side surface of the second quadrangular prism. The sunlight incident from the incident side causes the combined optical sheet to pass through or be reflected within the combined optical sheet to collect light from the solar cell disposed on the exit side. The focus of the sunlight when incident from the incident side surface is preferably formed in the second isosceles trapezoid or after the exit side. Fig. 9 is a view showing a focal point arrangement unit in which the focus of the sunlight is formed on the exit side in the isosceles trapezoid. [Embodiment] -20- 201241060 [Examples] Hereinafter, the present invention is not limited to the following examples by way of examples and comparative examples. Further, the weight average average degree of polymerization is a gel permeation chromatography (GPC) analysis. Example 1
添加由二甲基矽氧烷單元99.425莫耳％、 矽氧烷單元0.50莫耳％、二甲基乙烯基矽氧夫 莫耳％所構成，且平均聚合度爲約6000之有 1〇〇質量份、BET比表面積300m2/g之二拿 名Aerosil 300、日本Aerosil公司製）70質舅 散劑之六甲基二矽氮烷16質量份、水4質量 機混練，以1 7 0 °C加熱處理2小時而調製摻混I 對於上述摻混物100質量份，使作爲加域 之C-25A(鈾觸媒）/ C-25B(有機氫聚矽章 信越化學工業公司製）分別0.5質量份/ 2.0 根輥混練後，添加，均一混合後，以1201、 之條件進行沖壓熟化1 0分鐘，然後以200t穷 小時，以製作試驗用薄片。 實施例2 除BET比表面積300m2/g之二氧化 Aerosil 300、日本Aerosil公司製）之添加量 明，但本發 子量、重量 苯乙烯換算 甲基乙烯基 :單元 0.025 機聚矽氧烷 化矽（商品 份、作爲分 份，以捏合 % 0 交聯硬化劑 烷）（均爲 質量份以2 70kgf/ cm2 行後熟化4 矽（商品名 80質量份、 -21 - 201241060 六甲基二矽氮烷 藉由與實施例1 « · 5質量份 '水4.6質量份以 间樣的方法，使薄片成型。 ’其餘係 實施例3 除BET比表面積300m2/g之二氧化矽 Aer〇S1l 3 00、日本Aer〇si丨公司製）之添加量！ 、六甲基—矽氮烷23質量份、水5.7質量份 係藉由與實施例1同樣的方法，使薄片成型。 實施例4 除BET比表面積38〇m2/g之二氧化矽 Aerosil 3 80、日本Aer〇sil公司製）之添加量7〇 甲基一砂氮院20.3質量份、水5_〗質量份以外 藉由與實施例1同樣的方法，使薄片成型。 實施例5 除BET比表面積300m2/g之二氧化矽 Aerosil 380、日本Aerosil公司製）之添加量70 六甲基二矽氮烷2 2質量份、水5.4質量份以外 藉由與實施例1同樣的方法，使薄片成型。但， 片時之模具而言，使用成型後入射面之一部分成 模具。 實施例6 (商品名 〇〇質量份 :外，其餘 (商品名 質量份、 ，其餘係 (商品名 質量份、 ，其餘係 就成型薄 爲平面之 -22- 201241060 除BET比表面積3〇〇m2/ g之二氧化矽（商品名 Aerosil 3 00 '日本Aerosil公司製）之添加量1〇〇質量份 、六甲基二砂氮烷21質量份、水50質量份以外’其餘 係藉由與實施例5同樣的方法，使用成形後入射面之—部 分成爲平面之模具而成型。 比較例1 除BET比表面積3〇〇m2/g之二氧化矽（商品名 Aerosil 300、日本Aerosil公司製）之添加量5〇質量份、 六甲基二矽氮烷11.4質量份、水2.9質量份以外，其餘係 藉由與實施例1同樣的方法，使薄片成型。 比較例2 除BET比表面積2 00m2/g之二氧化矽（商品名 Aerosil 200、日本Aerosil公司製）之添加量70質量份、 六甲基二矽氮烷16質量份、水4質量份以外，其餘係藉 由與實施例1同樣的方法，使薄片成型。 <薄片之評估方法> 對於實施例1〜6及比較例1〜2所得到之薄片，測定 可塑度、硬度（Durometer A )、就透明性評估而言測定 2mm薄片之全光線穿透率及霾値（霧價）。可塑度係藉 JIS K6249測定’硬度（Durometer A)係使橡膠組成物以 120°C/l〇分之條件硬化，依據JIS K6249而測定，全光 -23- 201241060 線穿透率及霾値（霧價）係藉Suga試驗機公司製直讀霾 度電腦HGM - 2測定。結果表示於表1 » [表η 可塑度 硬度 (Durometer A ) 全光線穿透率 霾値 (%) 實施例1 435 68 93.4 6.3 實施例2 536 71 93.5 6.0 實施例3 720 75 92.6 4.8 實施例4 460 71 92.2 6.2 比較例1 250 60 88.4 11.7 比較例2 390 64 88.0 10.3 於實施例1〜6所得到的薄片係可塑度及硬度優異。 又，於實施例1〜6所得到的薄片係全光線穿透率爲9 0 % 以上，霾値（霧價）爲8以下，爲透明性高者，適宜於集 光型太陽光的光學薄片。從煙霧質二氧化矽之添加量不足 的比較例1所得到之薄片、或使用BET比表面積200m2/ g之二氧化矽的比較例2所得到之薄片係透明性低者，無 法使用於集光型太陽光之光學薄片。 又，對於實施例1〜5所得到的薄片係使用太‘陽光電 池I - V測定系統（股份公司〇 p t 〇 R e s e a r c h製）而進行測 定。於實，施例1〜5所得到的薄片如圖7所示般，使用聚 矽氧樹脂而黏著短柵狀之單元。爲比較特性，與使用於各 薄片之短柵狀單元的總面積相同之面積的單元，與於實施 例1〜5所得到的薄片厚度相同厚度之平板聚矽氧薄片同 樣地做法而黏著亦製作成平板模型。測定係在太陽光模擬 -24- 201241060 器下進行，使照射擬似太陽光爲l〇〇mW/ cm2、AM 1.5從 正上方以±30度之角度照射，求出定義爲短路電流及其等 之比的光學性集光倍率後，與平板模型比較而確認出可 2.4〜2.6倍集光。 進一步，於實施例1〜6所得到的薄片係使用可照射 3 OOnm附近波長之光的UV照射裝置而進行500小時之照 射。爲了比較，與聚矽氧薄片相同厚度之丙嫌酸樹脂性的 板、聚碳酸酯樹脂製之板，亦同樣地照射後，丙烯酸樹脂 性的板及聚碳酸酯樹脂製之板，係產生變色及龜裂等，但 相對於此聚矽氧薄片係幾乎看不到變化，而確認出耐久性 優異。 【圖式簡單說明】 圖1係表示使用光學薄片之集光型太陽光電池的一例 之截面圖。 圖2係表示使用光學薄片之集光型太陽光電池的一例 之立體圖。 圖3係表示使用光學薄片之模組的構成之一例的截面 圖。 圖4係表示太陽光垂直地入射於入射側面，入射光之 焦點形成於較射出側面更後方之例。 圖5 ( A )與（C )係表示太陽光垂直地入射於入射側 面’入射光之焦點形成於較射出側面之內側的等腰梯形內 部之例子’（B )係表示太陽光垂直地入射於入射側面， -25- 201241060 入射光之焦點形成於等腰梯形外部之例子。 圖6係表示太陽光以23度入射於入射側面，入射光 於光學薄片內全反射而到達射出側面之例。 圖7係表示使用一使太陽光入射側面之一部分形成平 面的光學薄片之集光型太陽光電池的一例之截面圖。 圖8係表示在使太陽光入射側面之一部分形成平面的 光學薄片中，太陽光以23度入射於入射側面，入射光於 光學薄片內全反射而到達射出側面之例。 圖9係表示使用光學薄片之兩面集光型太陽光電池的 一例之截面圖。 圖1〇係表示使用光學薄片之兩面集光型太陽光電池 的一例之立體圖。 【主要元件符號說明】 1、 11、21、31、41、51、61:光學薄片 2、 62 :單元 3、 6 3 :入射側面 4 :白板強化玻璃 5:單元薄片固定治具 6 ·‘支撐薄片或強化玻璃 63c :曲面部 63f :平面部 L :太陽光 -26-Adding a composition of 99.425 mol% of dimethyloxane unit, 0.50 mol% of oxirane unit, and dimethyl vinyloxime mol%, and an average degree of polymerization of about 6,000. Part, BET specific surface area 300m2 / g of the second name Aerosil 300, made by Japan Aerosil Co., Ltd. 70 bismuth hexamethyldioxane 16 parts by mass, water 4 mass machine mixed, heat treatment at 170 ° C Preparation of Blending I for 2 hours For 100 parts by mass of the above-mentioned blend, 0.5 parts by mass of C-25A (uranium catalyst) / C-25B (manufactured by Organic Hydrogen Co., Ltd.) After the 2.0 rolls were kneaded, they were added, uniformly mixed, and subjected to stamping and aging for 10 minutes under the conditions of 1201, and then dried at 200 tons to prepare test sheets. Example 2 In addition to the addition amount of the oxidized Aerosil 300 having a BET specific surface area of 300 m 2 /g, manufactured by Nippon Aerosil Co., Ltd., the amount of the hair, the weight of the styrene-converted methyl vinyl group: unit 0.025 machine polyoxyalkylene hydride (commodity portion, as a fraction, kneading % 0 cross-linking hardener alkane) (all parts of the mass are 2 70 kgf / cm 2 after the maturity of 4 矽 (trade name 80 parts by mass, -21 - 201241060 hexamethyldifluoride) The alkane was molded into a sheet by an in-situ method of 4.6 parts by mass with respect to Example 1 «·5 parts by mass of water. 'Others Example 3 Except for cerium oxide Aer〇S1l 3 00 having a BET specific surface area of 300 m 2 /g, Addition amount of A 甲基 〇 丨 丨 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 23 BET BET BET BET BET BET BET BET BET BET BET BET BET BET BET BET BET BET The addition amount of 38 〇m 2 /g of cerium oxide Aerosil 3 80, manufactured by Aer〇sil Co., Ltd., Japan, 20.3 parts by mass of methyl sulphate, and 5 _ mass parts of water were the same as in Example 1. To shape the sheet. Example 5 The same amount as in Example 1 except that the amount of addition of hexamethyldioxane to 2 parts by mass of hexamethyldiaziridine and 5.4 parts by mass of water were added in an amount of 70 parts by weight of cerium oxide, Aerosil 380 (manufactured by Nippon Aerosil Co., Ltd.) having a BET specific surface area of 300 m 2 /g. The method of forming the sheet. However, in the case of a sheet mold, a part of the incident surface after molding is used as a mold. Example 6 (trade name: mass part: outside, the rest (product name mass parts, the rest of the system (product name mass parts, the rest of the system is formed into a thin plane -22-201241060 except BET specific surface area 3〇〇m2 / g of cerium oxide (trade name: Aerosil 3 00 'made by Nippon Aerosil Co., Ltd.) is added in an amount of 1 part by mass, 21 parts by mass of hexamethyldistenazane, and 50 parts by mass of water. In the same manner as in Example 5, a part of the incident surface was formed into a flat mold. Comparative Example 1 In addition to cerium oxide (trade name: Aerosil 300, manufactured by Nippon Aerosil Co., Ltd.) having a BET specific surface area of 3 〇〇 m 2 /g The sheet was molded in the same manner as in Example 1 except that the amount of addition was 5 parts by mass, 11.4 parts by mass of hexamethyldioxane, and 2.9 parts by mass of water. Comparative Example 2 In addition to the BET specific surface area of 00 m 2 / In the same manner as in Example 1, except that the amount of g of cerium oxide (trade name: Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.) was 70 parts by mass, 16 parts by mass of hexamethyldiazepine, and 4 parts by mass of water. Method to form a sheet. <Sheet Evaluation Method> For the sheets obtained in Examples 1 to 6 and Comparative Examples 1 to 2, the plasticity and hardness (Durometer A) were measured, and the total light transmittance and the flaw of 2 mm sheets were measured in terms of transparency evaluation ( Fog price. The plasticity is determined by JIS K6249' Durometer A. The rubber composition is hardened at 120 ° C / l, measured according to JIS K6249, all-optical-23-201241060 line penetration And 霾値 (fog price) was measured by Suga Test Machine Company Direct Reading Computer HGM-2. The results are shown in Table 1 » [Table η Plasticity Hardness (Durometer A) Total Light Penetration 霾値 (%) Example 1 435 68 93.4 6.3 Example 2 536 71 93.5 6.0 Example 3 720 75 92.6 4.8 Example 4 460 71 92.2 6.2 Comparative Example 1 250 60 88.4 11.7 Comparative Example 2 390 64 88.0 10.3 Obtained in Examples 1 to 6 The sheet was excellent in plasticity and hardness. Further, the sheet obtained in Examples 1 to 6 had a total light transmittance of 90% or more, and the enthalpy (fog price) was 8 or less, which was suitable for transparency. An optical sheet of concentrating sunlight. Adding from aerosol-type cerium oxide Insufficient amount of Comparative Example 1 to give a sheet, or a BET specific based transparent sheet 2 obtained by low surface area of 200m2 / g of silicon dioxide of Comparative Example, not be used in an optical sheet of the concentrating solar. Further, the sheets obtained in Examples 1 to 5 were measured using a solar cell I-V measuring system (manufactured by the company 〇 p t 〇 R e s e a r c h). As a matter of course, as shown in Fig. 7, the sheet obtained in Examples 1 to 5 was adhered to a unit having a short grid shape using a polyoxymethylene resin. For comparison characteristics, the cells having the same area as the total area of the short grid-like cells of the respective sheets were bonded and formed in the same manner as the flat polyfluorene oxide sheets having the same thickness as that of the sheets obtained in Examples 1 to 5. Into a flat model. The measurement system is carried out under the solar light simulation -24-201241060, so that the illumination is simulated as sunlight, l〇〇mW/cm2, and AM 1.5 is irradiated from the upper side at an angle of ±30 degrees, and the definition is defined as short-circuit current and the like. After the optical collection ratio of the ratio, it was confirmed that the light collection was 2.4 to 2.6 times as compared with the flat model. Further, the sheets obtained in Examples 1 to 6 were irradiated for 500 hours using a UV irradiation apparatus capable of irradiating light having a wavelength of about 300 nm. For comparison, an acrylic resin plate and a polycarbonate resin plate having the same thickness as the polyfluorene oxide sheet were irradiated in the same manner, and the acrylic resin plate and the polycarbonate resin plate were discolored. In addition, cracks and the like were hardly observed, and it was confirmed that the durability was excellent. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing an example of a concentrating solar cell using an optical sheet. Fig. 2 is a perspective view showing an example of a concentrating solar cell using an optical sheet. Fig. 3 is a cross-sectional view showing an example of a configuration of a module using an optical sheet. Fig. 4 shows an example in which sunlight is incident perpendicularly on the incident side surface, and the focus of the incident light is formed on the side closer to the exit side. 5(A) and (C) show an example in which sunlight is incident perpendicularly on the incident side surface. The focus of the incident light is formed inside the isosceles trapezoid inside the emission side surface. (B) indicates that sunlight is incident perpendicularly on the sunlight. Incident side, -25- 201241060 The focus of the incident light is formed on the outside of the isosceles trapezoid. Fig. 6 is a view showing an example in which sunlight is incident on the incident side surface at 23 degrees, and incident light is totally reflected in the optical sheet to reach the emission side surface. Fig. 7 is a cross-sectional view showing an example of a concentrating solar cell using an optical sheet which forms a flat surface on one side of sunlight incident side. Fig. 8 is a view showing an example in which sunlight is incident on one side of a side surface on which sunlight is incident, sunlight is incident on the incident side surface at 23 degrees, and incident light is totally reflected in the optical sheet to reach the emission side surface. Fig. 9 is a cross-sectional view showing an example of a double-sided concentrating solar cell using an optical sheet. Fig. 1 is a perspective view showing an example of a two-side concentrating solar cell using an optical sheet. [Description of main component symbols] 1, 11, 21, 31, 41, 51, 61: optical sheet 2, 62: unit 3, 6 3: incident side 4: whiteboard tempered glass 5: unit sheet fixing fixture 6 · 'support Sheet or tempered glass 63c: curved surface portion 63f: flat portion L: sunlight -26-