M328077 八、新型說明： 【新型所屬之技術領域】 本創作係有關一種太陽能電池，特別係一種太陽能電池之電極的改良。 【先前技術】 按，由於礦物燃料資源逐漸地減少、環境污染問題亦日益嚴重，故人們— •’直在尋找其他可替代的能源，如潮汐力、核能、太陽能等，以降低長期以來對 -石化能源的依賴性，而太陽能源與其他替代能源相較之下，係較不受區域性限 φ 制，故更可受到廣泛運用。 其中，太陽能電池又是實現太陽能源開發的主要成果 池原理乃基於光伏效應（photovo ltaic effect)，即利用太陽光與 材料相互作用產生電能，而太陽能電池所採用主要材料是導電膠，如 銀膠、紹膠，及半導體材料，如單晶石夕、多晶石夕與非晶石夕之石夕晶材或 Πΐ-ν紹t合物之半導體材料等，其中銀膠主要是可料太陽能電池之正面和 背面的電極，且背電極結構乃係具有數道鋁膠與銀膠設在矽晶材上。 • Θ准’銀膠之成本甚高，且背電極結構之製造程序又複雜，如第-圖所示， 先&供-石夕晶材2，然後需在石夕晶材2上量測、規劃每一道銘膠、銀勝所在位置、 .所需的寬度，接著如第二圖所示，將三道紹膠4印在石夕晶材2上，最後要將銀 :仔細對準兩轉間的間隔位置5後，才將兩道銀膠6印_晶材2上而完成 为電極結構，㈣怖卩歸，再轉。_，靖咖製造程序係 :當繁确，得需將_與銀賴位置設置的彳啤確，以避免崎和歸之接合 處起化學作用，而影響導電效果。 是故’如何提出-種改良的太陽能電池之電極，以使太陽能電池結構 M328077 更為完善，實已成為一亟待解決之問題。 【新型内容】 在此具體且詳細敘述本創作之目的，係為了克服習知技術之缺點， 遂提出一種創新的太陽能電池之電極，其係將一金屬層直接設置在鋁 膠層上，進而簡化背電極之製造過程，提高生產效率，且金屬層係採 - '用成本較低的材質，故又能助於整體生產成本的降低。 " 根據本創作所揭示的太陽能電池之電極，係包括一導電膠層，及一金 Α屬層位在導電層上，其中金屬層之材質係可被焊接之材質，如銅或銅合金等， 並採用物理氣相沈積(PVD)法、電鍍法、化學電鐘法或置換電鍍法之方式將金屬 層形成在導電膠層上。 本創作之此些目的或其他目的對於此技藝之通常知識者而言，閱讀以下實 施例之詳細内容後係顯而易知的。 先引的概述與接下來的詳細叙述都是範例，以便能進—步解釋本創作之專 利請求項。 【實施方式】 本創作揭示-種太陽能電池之電極，其係作為太陽能電池的背電 極’且為便於說明本創作之技術特徵及目的，底下係以晶财太陽能 電池作為實施例，但並不限於此。 了參照第-圖，係一種晶體石夕太陽能電池之結構示意圖。如圖所示，本創 作之晶體外陽能電池職包括 i + ¥體層12，一_料體層Η位在P型半 二、/，及，極16位在之下面，且柳半導體層 數金屬栅線18，以作為正面電極。且，請連同參照第二圖之背電極 6 M328077 結構之放絲意®，顯㈣電極職包括—導轉賴〗設在P料導體層12 上，其中導電膠層161之材質係可獅如_或含_膠等之可導電材質，且導 電膠層m與p型半導體層12之接面係作為_f表面場（_如心 field，娜），用於增加載子的收集與回收沒有被吸收的光子，進而提高太陽能 電池的效率’以及—金屬層162位在導_層161上且覆蓋導電膠層⑻，其中金 屬層162之材質係選自於可被燁接之材質，如選自於由銅、銀、金、銅合金、銀 -合金與金合金等所組成的群組，故金屬層162不但可作為導電電極，又兼具有焊 接層之_，_於提供與外界連接的焊接處，_又財良好的料效果， 另’係透過_論讎嫩、紐法、化輪蝴_法將金屬層 廳形成在導觸161上。其中，金屬細可根據需求，以成本較低的銅、銅 合金為主，或者是亦可含有金、銀材質。 因此，本創作所揭示的太陽能電池之電極係—種結構簡單的背電 極結構，可簡化習知背電極之繁雜製造程序，以助於生產效率的提升， 且所揭示的金屬層不但可作為導電電極，又可作為焊接層，另，由於 係採用整片金屬層覆蓋在導電膠層上，所以可受焊接的範圍就變大，而能夠 在整片金制上顺焊接，鱗決習知拘祕背電極結構之數道平行銀膠而焊 接不便的窘境。此外，又侧成本較低且導電性、導熱性佳的金屬層， 如銅、銅合金取代習知高成本的銀膠作為可受焊接的導電電極，降低成 本。 以上所述之實施例僅係為說明本創作之技料想及特點盆目的 在使熟習此項技藝之人士能夠瞭解本創作之心並據以實施當不能 以之限林創作之專職圍，即大凡依頓作所揭秋精神所作之均 7 M328077 等變化或修飾，仍應涵蓋在本創作之專利範圍内。 【圖式簡單說明】 第一圖、第二圖與第三圖係習知太陽能電池之背電極結構之製造流程 圖。 第四圖係本創作之太陽能電池結構示意圖。 ·-第五圖係本創作之太陽能電池之背電極結構示意圖。 •-【主要元件符號說明】 2 ^夕晶材 4鋁膠 5位置 Θ銀膠 10晶體矽太陽能電池 12 P型半導體層 14 N型半導體層 16背電極 161導電膠層 162金屬層 18金屬柵線 8M328077 VIII. New Description: [New Technology Field] This creation is about a solar cell, especially an improvement of the electrode of a solar cell. [Prior Art] According to the gradual reduction of fossil fuel resources and the increasing environmental pollution problems, people are looking for alternative energy sources such as tidal power, nuclear energy and solar energy to reduce long-term The dependence of petrochemical energy, while the solar energy source is less than the regional limit, it is more widely used. Among them, the solar cell is the main result of the realization of solar energy source. The principle of the pool is based on the photovoltaic effect (photovo ltaic effect), that is, the use of sunlight to interact with materials to generate electrical energy, while the main material used in solar cells is conductive glue, such as silver glue. , Shaojiao, and semiconductor materials, such as single crystal stone, polycrystalline stone and amorphous stone Xishi stone crystal or Πΐ- ν t 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 The front and back electrodes, and the back electrode structure is provided with a plurality of aluminum and silver glue on the bismuth crystal. • The cost of 'silver glue' is very high, and the manufacturing process of the back electrode structure is complicated. As shown in the figure--, the first & supply - Shixi crystal material 2, and then need to measure on the stone crystal 2 Plan the width of each gelatin, Yinsheng, and the required width. Then, as shown in the second figure, print the three Daosu 4 on the stone crystal 2. Finally, carefully align the silver: After the interval between the turns of 5, only two silver pastes 6 on the crystal 2 are completed as the electrode structure, (4) horrible, and then transferred. _, Jingca manufacturing process department: When it is complicated, it is necessary to set the 彳 and 银 银 银 银 银 , , , , , , 银 银 银 银 银 银 银 银 银 银 银 银 银 银 银 银 银 银 银 银 银Therefore, how to propose an improved solar cell electrode to make the solar cell structure M328077 more perfect has become an urgent problem to be solved. [New content] The purpose of this creation is specifically and in detail described herein, in order to overcome the shortcomings of the prior art, an innovative solar cell electrode is proposed, which directly sets a metal layer on the aluminum adhesive layer, thereby simplifying The manufacturing process of the back electrode improves the production efficiency, and the metal layer is used - the material with lower cost is used, which can help reduce the overall production cost. " The electrode of the solar cell disclosed in the present invention comprises a conductive adhesive layer and a metal layer on the conductive layer, wherein the material of the metal layer is a material that can be welded, such as copper or copper alloy. And forming a metal layer on the conductive adhesive layer by physical vapor deposition (PVD), electroplating, chemical electric clock or displacement plating. These and other objects of the present invention will become apparent to those of ordinary skill in the art. The first summary and the following detailed description are examples so that the patent claims of this creation can be further explained. [Embodiment] The present invention discloses an electrode of a solar cell, which is used as a back electrode of a solar cell, and for the purpose of explaining the technical features and purposes of the present invention, the crystal solar cell is taken as an embodiment, but is not limited thereto. this. Referring to the first figure, it is a schematic structural view of a crystal solar cell. As shown in the figure, the crystal external solar battery of this creation includes the i + ¥ body layer 12, a body layer is clamped in the P-type half two, /, and the pole 16 is below, and the Liu semiconductor layer metal The gate line 18 serves as a front electrode. Moreover, please refer to the structure of the back electrode 6 M328077 of the second figure, and the display (four) electrode position is included on the P material conductor layer 12, wherein the material of the conductive adhesive layer 161 is lion. _ or an electrically conductive material containing _ glue or the like, and the junction of the conductive adhesive layer m and the p-type semiconductor layer 12 is used as a _f surface field (_heart field, Na) for increasing the collection and recovery of carriers. The absorbed photons, thereby improving the efficiency of the solar cell, and the metal layer 162 are on the conductive layer 161 and covering the conductive adhesive layer (8), wherein the material of the metal layer 162 is selected from materials that can be spliced, such as Since the group consists of copper, silver, gold, copper alloy, silver-alloy and gold alloy, the metal layer 162 can be used not only as a conductive electrode but also as a solder layer. The welding place, _ good financial effect, the other 'through the _ 雠 雠 、 纽 纽 纽 纽 纽 纽 纽 纽 纽 纽 金属 金属 金属 金属 金属 金属 金属 金属 金属 金属 金属 金属 金属 金属 金属 金属 金属 金属Among them, the metal can be mainly made of copper or copper alloy with low cost according to demand, or it can also contain gold or silver. Therefore, the electrode of the solar cell disclosed in the present invention has a simple structure of the back electrode structure, which can simplify the complicated manufacturing process of the conventional back electrode, thereby contributing to the improvement of production efficiency, and the disclosed metal layer can be used not only as a conductive material. The electrode can also be used as a soldering layer. In addition, since the entire metal layer is covered on the conductive adhesive layer, the range of soldering can be increased, and the solder can be welded on the whole piece of gold. The back-electrode structure has several parallel silver pastes and is inconvenient to weld. In addition, a metal layer having a lower cost and good electrical conductivity and thermal conductivity, such as copper or copper alloy, replaces the conventional high-cost silver paste as a conductive electrode that can be soldered, thereby reducing the cost. The embodiments described above are merely illustrative of the technical significance of the present invention. The purpose of the present invention is to enable those skilled in the art to understand the meaning of the creation and to implement a full-time division that cannot be created by Lin. Changes or modifications to the average of 7 M328077, which are based on the spirit of the autumn of the Institute, should still be covered by the scope of this creation. BRIEF DESCRIPTION OF THE DRAWINGS The first, second and third figures are diagrams showing the manufacturing process of the back electrode structure of a conventional solar cell. The fourth picture is a schematic diagram of the solar cell structure of the present creation. The fifth figure is a schematic diagram of the back electrode structure of the solar cell of the present invention. •-[Main component symbol description] 2 夕晶晶4 aluminum glue 5 position Θ silver glue 10 crystal 矽 solar cell 12 P-type semiconductor layer 14 N-type semiconductor layer 16 back electrode 161 conductive adhesive layer 162 metal layer 18 metal gate line 8