201133507 τ 六、發明說明： 【發明所屬之技術領域】 本發明係主張關於2009年09月03日申請之韓國專利案號 10-2009-0082748之優先權’藉以引用的方式併入本文用作參考。 本發明係有關於於一種漿料組成物與使用漿料組成物之太陽 能電池電極。 【先前技術】 最近’因為石化㈣的缺乏，開發下—代潔淨能源已成為更 重要的課題。在下-代料能源之中，作為解決未來能源的問題， 太陽能電池是備受矚目的麟’目為太陽能電崎少造成環境污 染、具有半永久性的壽命和取之不盡、肖之獨的太陽光資源。 經由具有Ν型半導體(射極）以及ρ型半導表面場(bsf) 層）的祕板上形成上(t〇p)電極和背(職）電極而製作出太陽能 電池。在太陽能電池技術中，如何控制鍾曲特性（bowing characteristics)是非常重要的課題。為了改善輕曲特性，提出 了減少背電極厚度的方法。然而，根據上述方法，因為背電極厚 度變薄可能導致背電極的電阻特性纖比概㈣出c) 隻差從而可能會使光電轉換效率（photoelectronic transformation efficiency)降低。 【發明内容】 本發明之實施赠供—觀做成她她卿。沿i〇n)， 八藉由降低月電極厚度來改善魅曲特性，且不會使光電轉換效率 201133507 ' 降低，以及使用該漿料組成物的太陽能電池電極。 根據實施例，用於太陽能電池電極的漿料組成物包括一鋁粉 (aluminum powder); —玻璃料(giass fri1：); 一有機載體(〇rganic vehicle);以及一無機填料（inorganic filler)。無機填料包括金 屬氧化物（metal oxide)。 金屬氧化物可包括至少一或兩個係選自由鐵、鉻、鈷、鋁、 鈦、錳、銻、鈦及辞所組成的群組。 無機填料可包括至少-或兩個係選自由鐵基氧化物、鐵絡基 氧化物、雜基氧化物、触鈦基氧化物、祕錄氧化物、始 銘基氧化物、鱗鈦純錄、鱗鈦基氧化物及麟鋅鈦基氧 化物所組成的群組。 無機填料的量可佔祕組成物總量的丨至1()峨（重量百分 比）。 叔可包括粒彳k為G. 1至2/λπ的球形(spherieal)㉟粉盘粒徑 為〇.5至20州的球形1呂粉。此外，紹粉可包括粒徑為0. i至2州 的球形銘粉、粒徑為〇. 5至20州的球形銘粉和平均側邊尺寸(_ psides)間為20至^的板型(細t㈣銘 卜可包括佔轉34至5G wt%且粒徑為g· 1至2 _的球开; 射至3呂Wt%卿為G. 5至2G㈣的她_ =3㈣且平均長側邊尺寸2〇至5〇卿的_呂粉。 麵料可包括至少-選自由氧格二氧峨材料、氧化 201133507 -二氧切-三氧化二絲材料、氧化鋅_二氧化祕材料、氧化辞 -三氧化二棚-二氧切基材料和三氧化二i三氧化二·_氧化辞 -一氧化叾夕基材料所組成之群組。 玻璃料的量佔料組成物總量的丨到1〇 wt%。 有機載體的量佔聚料組成物總量的2〇到3〇㈣。 本發明之實施例提供-種太陽能電池電極，該太陽能電池電 極之製造可使用上述之漿料組成物。 太1¼能電池電極可包括一背電極。 使用根據本發明貫施例之聚料組成物的太陽能電池電極就基 板（例如’雜板）*言具有制的顧強度絲佳祕接特性。 另外’即她相太陽能電池電極其背面電場⑽)也可起足夠的 功效達成太陽能電池發電的需求，並且防止烘烤製姉也呢 process)後社陽能電池_曲陳況。此外，太雜電池的光 電轉換效率可以得到改善。 【實施方式】 下文中將洋細描述與說明本發明之實施例用於太陽能電池 電極的漿料組成物。 用於太陽能電池電極的漿料域物包括-崎、―玻璃料、 -有機載體、以及-無機填料。無機填料可包括金屬氧化物。 根據本發明之實_，崎可為—球形(獅如丨、 -板形（Plate shape)、一鐘形（bell油聊）或一片狀（服6 shape)。金屬粉末可由形狀烟或形狀不同_粒所組成。 201133507 鋁粉可混合至少兩種不同粒徑尺寸或形狀的粉末而製備。例 如紹私的製備可混合具有粒徑〇· J i 2卿的球形銘粉與粒徑〇 5 至20燜的球形銘粉。此外，铭粉的製備可混合具有粒徑〇.丨至2 卿的球形鱗與粒徑〇.5 i 2〇卿的球形銘粉和平均長側邊尺寸 (mean size of long iateral sides) 2〇 至 5〇 燜間的板形鋁粉 如果紹粉的製備混合兩種或三種具有多種特徵馳粉粉末， 將可擴大料組成物與太陽能電池錄板之接_積。在這種情 況下’銘粉在漿料組成物的擴散區域變得更大，這樣可以有效地 形成背面電場(BSF)層。 此外，當具有不同粒徑尺寸/形狀的粉末相互混合，可使鋁粉 間充填密度增加，從而使電氣特性(electric characteristic)可 以得到改善。料，在祕理製程(heat treatment Pnx：ess)中， 粉末很少會膨脹，所以粒子的壓縮率（伽轉觀i〇n她 the particles)可以能夠最小。 此外’如果I呂粉混合兩種或三種具有不同粒徑尺寸/形狀的粉 末’表面電阻她曲特性可以得狀善。舉例而言，當太陽能電 池妨模組組糾，如果_雛科於lmm，太陽能電池可能 很谷易碎裂祕，而本發明之實施例可以避免太陽能電池的碎裂 損壞。 B鋁粉的量約佔蒙料組成物總量的6〇至9〇郝。如果銘粉的 置約佔漿料域物總量超過9()峨社時，則祕組成物將無法 被製備成膏狀。如果銘粉的量約佔聚料組成物總量小於6〇峨 201133507 時，因導電材料量的減少，從而使背電極的電阻增加。也就是說， 當太陽能電池具有上述組成物的比率，祕組成物的燒結性可望 改善，而太陽能電池的效率也可以得到改善。 例如’銘粉可包括佔銘粉34至5〇 wt%且粒徑〇·)至2卿的 球形銘粉、佔紹粉17至50 wt%且粒徑〇. 5至2〇 w的球形銘粉， 佔铭粉G至33 Wt%且平均長側邊尺寸為駐5_關板形銘粉。 玻璃料包括至少-係選自由氧化錯_二氧化石夕基材料、氧化錯 -一氧化矽-二氧化二硼基材料、氧化鋅_二氧化矽基材料、氧化鋅 -一氧化二硼-二氧化矽基材料和三氧化二鉍—三氧化二硼—氧化鋅 -二氧化矽基材料所組成之群組。 玻璃料的量可佔漿料組成物總量的1至20 wt%，最好是佔 聚料組成物的1至1Gwt%。如果玻璃料的量㈣料組成物總量小 ;1 wt/時黏性和勉曲特性可能會降低。反之，如果玻璃料的 量佔衆料組成物總量超過2Q wt%時，軌特性可能降低、從而使 效率降低。 最佳的疋，破璃料之軟化點（softening point )為300至 600 C、平均粒徑尺寸為i至1〇㈣。在這種情況下填充因子和 燒結密度得以改善。 有機載體使漿料組成物具有黏性和流變性，使得漿料組成物 可適用於_的製程。有機紐常被用於祕喊物。例如，有 機載體可包括—溶劑和-聚合物的-混合物。 聚5物可包括丙烯酸樹脂（acrylate resin)、乙基纖維素 7 201133507 (ethylcellulous)、石肖基纖維素(nitrocellulous)、乙基纖維素 和紛樹脂之高分子（polymer of ethyl cell ulous and phenol resin)、木松香（wood rosin)、聚甲基丙浠酸酯醇 (polymethacrylate of alcohol)。最好是該聚合物是使用乙基纖 維素(ethylcellulous)。 溶劑可包括至少一或兩個係選自由乙酸丁基二甘醇脂 (butylcarbitolacetate)、二乙二醇單丁趟(butylcarbitol)、乙 二醇丁醚（butylcellosolve)、乙二醇丁醚醋酸酉旨 (butylcellosolve acetate)、丙二醇單甲 _ (propyleneglycolmonomethylether)、二丙二醇單甲鱗 (d i propy1eneg1yco1raonoraethy1ether) 、 propy1eneg1y co1monomethy1prop i onate 、 ethyletherpropionate、松油醇（terpineol)、丙二醇單曱趟醋酸 酉旨（propyleneglycolmonomethyletheracetate)、二曱胺 (dimethylamino)、甲酸（formaldehyde)、methylethylketone、 Τ -丁内酯（gamma-butyrolactone)、ethyl actate、及 2, 3, 4-三 曱基-1，3-戍二醇單異丁酸酯（texanol)所組成的群組。最好是該 溶劑使用乙酸丁基二甘醇脂(butylcarbitolacetate)。 有機載體可包括鱗基分散劑(phosphorus based dispersing agent)、搖變劑（thixotropic agent)、勻染劑（leveling agent) 和反發泡劑（anti-foaming agent)。有機載體還可包括摻雜擴散 溶液（dopant diffusion solution) ° 201133507 4 搖變劑可包括尿素類(urea type)、醯胺類（amide type)或聚 氨酯類聚合物（urethane type p〇lymer)/有機物 substance)或無機石夕（in〇rganic siHca)。 有機漿料的量佔漿料組成物總量約20至50 wt%。如果有機 漿料的量佔漿料組成物總量小於2〇wt%時，因有機物質的量減少 而使印刷特性降低。如果有機漿料的量佔衆料組成物總量超過5〇 wt%時，粘度降低，印刷製程完成的膜層可能會破損。 無機填料可包括金屬氧化物。具體而言，無機填料是金屬氧 化物，其中金屬氧化物包括至少一或兩個係選自由鐵、鉻'鈷、 鋁、鈦、錳、錦、鈦及辞所組成的群組。例如，無機填料可包括 至少一或兩個係選自由鐵基氧化物、鐵鉻基氧化物、鈷鋁基氧化 物銘紹鈦基氧化物、鈷鉻結基氧化物、鉢銘基氧化物、猛錄鈦 基氧化物、鐵鋅鈦基氧化物及始錄鋅鈦基氧化物所植成的群組。 無機填料可包括一預定顏色的顏料。 無機填料的功用為調整漿料組成物的熱膨脹係數。具體而 言’無機填料調整姉⑦晶圓之間的熱膨脹係數，以減少烘烤製 私後太陽能電池馳曲以及改善導電率。因此，背電極的導電率 得以改善，這樣可以提高太陽能電池的效率。 表1為本發明之實施例的無機填料特性， 201133507 表1 項目 熱膨脹係數 (Thermal expansion coefficient) [10'6/°C] 導電率 (Conductivity) [6/zS/cm] 反射率 (Reflective rate) 於 700〜llOOnm [%] 銘鎳鈦鋅基 氧化物 12.5 293 50 始銘欽基 氧化物 13.5 1123 60 鐵氧化物 12.5 160 25 鋁 23 363600 — 明參考圖1 ’鈷鎳鋅鈦基氧化物、鈷鋁鈦基氧化物、以及鐵氧 化物表現出低熱膨脹係數與極佳的導電率。 最好無機輕的4佔漿畅成物總量的1至10 wt%。如果益 機填料的量佔祕組成物總量超過1G wt%，鱗的含量將減少以 致於電轧特!·生跟著減4。此外，如果無機填料的量佔漿料組成物 總量低於1 wt%，無機填料的韻可能無法實現。 10 201133507 下文中，將詳細說明用於太陽能電池之漿料組成物的製造方 法。 首先，將如丙稀酸樹脂（acrylate resin)、乙基纖維素 (ethylcellulous)、或硝基纖維素(nitrocellulous)的高分子樹 脂溶解於如乙酸丁基二甘醇脂（butylcarbitolacetate)的溶劑 之中，然後預混成有機載體。 然後，將有機載體、三種類型的鋁粉和無機填料進行預混。 在此之後，將一胺基、一酸基或一雙極分散劑添加到混合物之中， 藉以改善分散性。 最好是將混合物靜置熟化1至12小時以達到製程所需的分散 性。熟化的混合物再次以錫膏攪拌機、行星研磨機或3輥軋機充 分此合。然後，經過遽和消泡製程而產製出紹渡料。 下文中’請參考圖i所示，將舉例詳細說明太陽能電池使用 該衆料組成物的本發明之實施例。圖丨是一太陽能電池之剖視圖。 請參考圖1所示’太陽能電池包括上表面有一 N型半導體η 的一 ρ型石夕基板ίο、一上電極12電性連接到Ν型半導體u、以 及-背電極13電性連接到Ρ型德板1Q。—抗反光層14可形成 除形成上電極12以外區域的射極u的上表面。另外，一背面電 場(BSF)層15形成於砍基板10的背電極13。 在太陽能電池電極之聚料組成物印刷在如石夕晶圓的基板上 後’執行乾燥和烘烤·以製造太陽能電池的f電極η。 乾燥製程在90至25(rc溫度下進行和洪烤製程在剛至 11 201133507 9耽的溫度下進行。最奴高溫續速輯餘在 於溫度850至950°C左右條μ 〗i刀紅 M…9Λ 執仃。此m料組成物印刷的 旱又'力在至6G⑻。以上技術詳細揭露於韓國公開專利申請 10-2006-_8550號、第1〇_2_12觀號、日本公開專利^請 公開號第2GG卜2G2822號及第2__133567號文件的内容。上二 專利申請案内容藉以引用的方式作為參考。 ^ 下文中，將詳細描述本發明之實施例的實驗範例與比較範 例。這些例子僅作為說明之用，並不用以限定本發明。 [範例1] 漿料組成物的製備使用65公克（65 wt%)的鋁粉，5公克 (5 wt%)鈷鎳鈦鋅基氧化物的無機填料，26公克（26 wt%)的 有機載體和4公克（4 wt%)的玻璃料。 [範例2] 範例2與範例1相似，但除了無機填料的量（鈷鎳鈦鋅基氧 化物）為2公克（2wt%)和玻璃料的量為3公克（3 wt%)之外。 [範例3] 範例3與範例1相似’但除了無機填料的量（鈷鎳鈦鋅基氧 化物）為3公克（3wt%)和玻璃料的量為2公克（2 wt%)之外。 [範例4 ] 範例4與範例1相似’但除了無機填料的量（姑鎳欽鋅基氡 化物）為1公克（lwt%)和玻璃料的量為4公克（4wt%)之外。 [範例5 ][Technical Field] The present invention claims priority to Korean Patent Application No. 10-2009-0082748, filed on Sep. 3, 2009 . The present invention relates to a slurry composition and a solar cell electrode using a slurry composition. [Prior Art] Recently, due to the lack of petrochemicals (four), the development of the next generation of clean energy has become a more important issue. Among the next-substituting energy sources, solar cells are highly regarded as the problem of solving future energy. The solar energy is less environmentally polluted, has a semi-permanent life and is inexhaustible, and the sun is unique. Optical resources. A solar cell was fabricated by forming an upper (t〇p) electrode and a back (electrode) electrode via a secret plate having a Ν-type semiconductor (emitter) and a p-type semi-conductive surface field (bsf) layer. In solar cell technology, how to control bowing characteristics is a very important issue. In order to improve the softness characteristics, a method of reducing the thickness of the back electrode has been proposed. However, according to the above method, since the thickness of the back electrode is thinned, the resistance characteristic of the back electrode may be inferior to (c) out of c), which may lower the photoelectronic conversion efficiency. SUMMARY OF THE INVENTION The present invention provides a gift-view to make her and her. Along with i〇n), eight improves the charm characteristics by reducing the thickness of the moon electrode, and does not make the photoelectric conversion efficiency 201133507' lower, and the solar cell electrode using the slurry composition. According to an embodiment, the slurry composition for the solar cell electrode comprises an aluminum powder; a glass frit (giass fri1:); an organic carrier (〇rganic vehicle); and an inorganic filler. The inorganic filler includes a metal oxide. The metal oxide may comprise at least one or two selected from the group consisting of iron, chromium, cobalt, aluminum, titanium, manganese, lanthanum, titanium, and the like. The inorganic filler may include at least - or two selected from the group consisting of iron-based oxides, iron complex oxides, hetero-based oxides, titanium-based oxides, secret oxides, etched oxides, and titanium scales. A group consisting of a scale titanium oxide and a zinc alkaloid oxide. The amount of the inorganic filler may be from 丨 to 1 () 峨 (% by weight) based on the total amount of the secret composition. The uncle may include a spherieal 35 powder disk having a particle size k of G. 1 to 2/λπ and a spherical particle size of 〇.5 to 20 degrees. In addition, the powder may include a spherical powder of a particle size of 0. i to 2 states, a particle size of 〇. 5 to 20 states of spherical powder and an average lateral dimension (_psides) of 20 to ^ plate type (fine t (four) inscription may include a ball opening of 34 to 5G wt% and a particle size of g·1 to 2 _; shooting to 3 Lu Wt% Qing is G. 5 to 2G (four) of her _ = 3 (four) and the average long side The edge size is 2〇 to 5〇卿_吕粉. The fabric may include at least - selected from the group consisting of Oxygen Dioxide, Oxidation 201133507 - Dioxo-Secondary Wire Material, Zinc Oxide - Dioxide Secret Material, Oxidation - a group consisting of a oxidized two shed-dioxenyl material and a oxidized di-n-three-oxide oxidized-phosphorus oxide-based material. The amount of the glass frit accounts for the total amount of the constituents of the material to 1 〇wt% The amount of the organic vehicle is from 2 to 3 (four) of the total amount of the polymer composition. Embodiments of the present invention provide a solar cell electrode, which can be used to manufacture the above-described slurry composition. The solar cell electrode may include a back electrode. The solar cell electrode using the polymer composition according to the embodiment of the present invention has a substrate (for example, 'grooving board>) The strength of the system is better than that of the cable. In addition, the electric field (10) of the solar cell electrode of her phase can also be used to achieve the demand for solar cell power generation, and prevent the baking process. Battery _ 曲陈况. In addition, the photoelectric conversion efficiency of a too miscellaneous battery can be improved. [Embodiment] Hereinafter, a slurry composition for a solar cell electrode will be described and illustrated in the embodiment of the present invention. The slurry domains for solar cell electrodes include - Saki, "glass frit," - organic carriers, and - inorganic fillers. The inorganic filler may include a metal oxide. According to the invention, the singularity may be a spherical shape (a lion, a plate shape, a bell shape, or a piece of shape). The metal powder may be shaped by a smoke or a shape. Made up of different _ granules. 201133507 Aluminum powder can be prepared by mixing at least two powders of different particle size or shape. For example, Sauer's preparation can be mixed with spherical granules and particle size 〇5 with particle size 〇·J i 2qing In addition, the preparation of the powder can be mixed with a spherical scale with a particle size of 〇.丨 to 2 qing and a particle size of 5.5 i 2〇qing and the average long side dimension (mean Size of long iateral sides 2 to 5 板 plate-shaped aluminum powder If the preparation of the powder is mixed with two or three kinds of powder powders with various characteristics, it will expand the composition of the material and the solar cell recording board. In this case, 'Ming powder becomes larger in the diffusion region of the slurry composition, so that the back surface electric field (BSF) layer can be effectively formed. Further, when powders having different particle size/shapes are mixed with each other, Increase the packing density between aluminum powders to make electrical properties (electric c Haracteristic) can be improved. In the heat treatment Pnx: ess, the powder rarely swells, so the compression ratio of the particles (the gamma can be minimized). Ilu powder mixes two or three kinds of powders with different particle size/shape. The surface resistance of the powder can be good. For example, when the solar cell can block the module, if the _ younger in lmm, solar cell It may be very fragile, and the embodiment of the present invention can avoid the chipping damage of the solar cell. The amount of B aluminum powder accounts for about 6 to 9 〇 of the total amount of the composition of the material. When the total amount of the slurry domain exceeds 9 (), the secret composition will not be prepared into a paste. If the amount of the powder is about 6〇峨201133507, the conductive material The amount is reduced to increase the resistance of the back electrode. That is, when the solar cell has the ratio of the above composition, the sinterability of the secret composition is expected to be improved, and the efficiency of the solar cell can be improved. For example, 'Ming powder can Including mingming powder 34 to 5 〇wt% and particle size 〇·) to 2 Qing's spherical Ming powder, accounting powder 17 to 50 wt% and particle size 〇. 5 to 2〇w spherical powder, accounting for Ming powder G to 33 Wt% and the average long side dimension is in the 5_off plate shape powder. The glass frit includes at least one selected from the group consisting of an oxidized erbium-cerium oxide-based material, an oxidized erbium-cerium oxide-diboron-based material, a zinc oxide-cerium oxide-based material, and a zinc oxide-niobium oxide-two A group consisting of a cerium oxide-based material and a cerium oxide-boron trioxide-zinc oxide-cerium oxide-based material. The amount of the glass frit may range from 1 to 20% by weight based on the total amount of the slurry composition, preferably from 1 to 1% by weight of the composition of the polymer. If the amount of frit (four) is small, the total composition of the material may be reduced; the viscosity and tortuosity of 1 wt/hr may be reduced. On the other hand, if the amount of the glass frit exceeds 2Q wt% of the total mass composition, the rail characteristics may be lowered to lower the efficiency. The best 疋, the softening point of the glass frit is 300 to 600 C, and the average particle size is i to 1 〇 (four). In this case, the fill factor and the sintered density are improved. The organic vehicle imparts viscosity and rheology to the slurry composition, making the slurry composition suitable for use in the process. Organic New Zealand is often used for secrets. For example, an organic vehicle can include a mixture of a solvent and a polymer. The poly5 material may include an acrylate resin, ethyl cellulose 7 201133507 (ethylcellulous), nitrocellulous, ethyl cellulose and a polymer of ethyl cell ulous and phenol resin. Wood rosin, polymethacrylate of alcohol. Preferably, the polymer is ethylcellulous. The solvent may include at least one or two selected from the group consisting of butylcarbitolacetate, butylcarbitol, butylcellosolve, and ethylene glycol butyl ether acetate. (butylcellosolve acetate), propyleneglycolmonomethylether, di propy1eneg1yco1raonoraethy1ether, propy1eneg1y co1monomethy1prop i onate, ethyletherpropionate, terpineol, propylene glycol monoacetate acetate (propyleneglycolmonomethyletheracetate), diterpene Dimethylamino, formaldehyde, methylethylketone, gamma-butyrolactone, ethyl actate, and 2,3,4-tridecyl-1,3-decanediol monoisobutyrate ( Group of texanol). Preferably, the solvent is butylcarbitolacetate. The organic vehicle may include a phosphorous based dispersing agent, a thixotropic agent, a leveling agent, and an anti-foaming agent. The organic vehicle may further include a dopant diffusion solution (201132507). The shaker may include a urea type, an amide type or a urethane type p〇lymer/organic substance. Substance) or inorganic stone (in〇rganic siHca). The amount of the organic slurry is about 20 to 50% by weight based on the total amount of the slurry composition. If the amount of the organic slurry is less than 2% by weight based on the total amount of the slurry composition, the printing property is lowered due to a decrease in the amount of the organic substance. If the amount of the organic slurry accounts for more than 5% by weight of the total mass composition, the viscosity is lowered, and the film layer completed by the printing process may be damaged. The inorganic filler may include a metal oxide. In particular, the inorganic filler is a metal oxide wherein the metal oxide comprises at least one or two selected from the group consisting of iron, chromium 'cobalt, aluminum, titanium, manganese, bromine, titanium and rhodium. For example, the inorganic filler may include at least one or two selected from the group consisting of iron-based oxides, iron-chromium-based oxides, cobalt-aluminum-based oxides, titanium-based oxides, cobalt-chromium-based oxides, and cerium-based oxides. A group of precursors of titanium-based oxides, iron-zinc-titanium-based oxides, and zinc-titanium-based oxides. The inorganic filler may include a pigment of a predetermined color. The function of the inorganic filler is to adjust the coefficient of thermal expansion of the slurry composition. Specifically, the inorganic filler adjusts the thermal expansion coefficient between the 晶圆7 wafers to reduce the solar cell relaxation and improve the electrical conductivity after baking. Therefore, the conductivity of the back electrode is improved, which can improve the efficiency of the solar cell. Table 1 Characteristics of inorganic fillers according to examples of the present invention, 201133507 Table 1 Thermal expansion coefficient [10'6/°C] Conductivity (6/zS/cm) Reflectivity (Reflective rate) In 700~llOOnm [%] Ming Ni-Ti-Zn-based oxide 12.5 293 50 Shi Ming Qin-based oxide 13.5 1123 60 Iron oxide 12.5 160 25 Aluminum 23 363600 — Refer to Figure 1 'Cobalt nickel zinc titanium oxide, cobalt Aluminum-titanium-based oxides, as well as iron oxides, exhibit a low coefficient of thermal expansion and excellent electrical conductivity. Preferably, the inorganic light 4 is from 1 to 10% by weight of the total amount of the slurry. If the amount of the filler is more than 1G wt% of the total amount of the secret composition, the content of the scale will be reduced so that the electric rolling is reduced! Further, if the amount of the inorganic filler is less than 1% by weight based on the total amount of the slurry composition, the rhyme of the inorganic filler may not be achieved. 10 201133507 Hereinafter, a method of manufacturing a slurry composition for a solar cell will be described in detail. First, a polymer resin such as acrylate resin, ethylcellulous, or nitrocellulous is dissolved in a solvent such as butylcarbitolacetate. And then premixed into an organic vehicle. The organic vehicle, the three types of aluminum powder and the inorganic filler are then premixed. Thereafter, an amine group, an acid group or a bipolar dispersant is added to the mixture to improve the dispersibility. Preferably, the mixture is allowed to stand for 1 to 12 hours to achieve the desired dispersibility of the process. The aged mixture is again filled with a solder paste mixer, a planetary mill or a 3-roll mill. Then, after the sputum and defoaming process, the Shaodu material is produced. Hereinafter, please refer to Fig. i, an embodiment of the invention in which the solar cell uses the bulk composition will be described in detail. Figure 丨 is a cross-sectional view of a solar cell. Referring to FIG. 1 , a solar cell includes a p-type SiO substrate having an N-type semiconductor η on the upper surface, an upper electrode 12 electrically connected to the Ν-type semiconductor u, and a back electrode 13 electrically connected to the Ρ-type. German board 1Q. The anti-reflective layer 14 can form an upper surface of the emitter u except for the region where the upper electrode 12 is formed. Further, a back surface electric field (BSF) layer 15 is formed on the back electrode 13 of the cut substrate 10. After the polymer composition of the solar cell electrode is printed on a substrate such as a Shihua wafer, drying and baking are performed to fabricate the f-electrode η of the solar cell. The drying process is carried out at 90 to 25 (rc temperature and the baking process is carried out at a temperature of just 9 201133507 9 。. The most slave high temperature continuous speed is in the temperature of 850 to 950 ° C or so μ 〗 i knife red M... 9Λ 仃 仃 此 此 此 此 此 此 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷 印刷The contents of the second GG 2G2822 and the second __133567. The contents of the above second patent application are incorporated by reference. ^ Hereinafter, experimental examples and comparative examples of embodiments of the present invention will be described in detail. The invention is not intended to limit the invention. [Example 1] The slurry composition was prepared by using 65 g (65 wt%) of aluminum powder, 5 g (5 wt%) of an inorganic filler of cobalt nickel titanium zinc-based oxide, 26 g (26 wt%) of organic vehicle and 4 g (4 wt%) of frit. [Example 2] Example 2 is similar to Example 1, except that the amount of inorganic filler (cobalt nickel titanium zinc based oxide) is 2 The amount of grams (2 wt%) and frit is 3 g (3 wt%). [Example 3] Example 3 is similar to Example 1 'but except that the amount of inorganic filler (cobalt nickel titanium zinc based oxide) is 3 grams (3 wt%) and the amount of frit is 2 grams (2 wt%). [Example 4] Example 4 is similar to Example 1 'but except that the amount of the inorganic filler (a nickel-zinc-based telluride) is 1 gram (lwt%) and the amount of the glass frit is 4 gram (4 wt%). [Example 5]
12 S 201133507 ‘ 範例5與範例1相似’但除了無機填料的量（鈷鎳鈦鋅基氧 化物）為2公克（2wt%)和玻璃料的量為3公克（3wt%)之外。 [範例6] 範例6與範例1相似’但除了無機填料的量（鈷鎳鈦鋅基氧 化物）為3公克（3wt%)和玻璃料的量為2公克（2 wt%)之外。 [範例7 ] 範例7與範例1相似，但除了無機填料的量（鐵基氧化物） 為1公克（lwt%)和玻璃料的量為4公克（4 wt%)之外。 [範例8] 範例8與範例1相似，但除了無機填料的量（鐵基氧化物） 為2公克（2wt%)和玻璃料的量為3公克（3 wt%)之外。 [範例9 ] 範例9與範例1相似，但除了無機填料的量（鐵基氧化物） 為3公克（3wt%)和玻璃料的量為2公克（2 wt%)之外。 [比較範例] 漿料組成物的製備類似範例1，除了沒有使用無機填料和玻璃 料的量是5公克（5 wt%)之外。 使用範例1到9的漿料組成物與比較範例的漿料成份以網印 製程印刷麵基板±並以溫度16(rc進行乾燥製程。此外，再以快 速熱處理製程進行溫度在85(rc後製造太陽能電池之背電極。 透過上述方法所製造的太陽能電池的背電極其性能和效率， 請見表2和3。 13 201133507 表2 鋁表面電阻 背面電場電阻 越曲特性 A1 surface BSF Bowing resistance resistance characteristic (mQ) (πιΩ) (mm) 比較範例 14.01 5.74 1.519 範例1 12.23 6.32 1.181 範例2 13.47 7.84 1.332 範例3 13.34 10.63 1.298 範例4 12.08 7. 11 1.139 範例5 12.01 7.26 1.141 範例6 15.24 7.90 1.126 範例7 11.44 7.60 1.560 範例8 13.81 8.08 1.124 範例9 14. 60 8.40 1.184 表3 短路電流 Isc 開路電壓 Voc 填充因子 FF 效率 Eff. (ratio) 比較範例 8. 34 0.62 0.74 1.00 範例1 8. 37 0.62 0.75 1.02 14 201133507 範例4 8.35 0.63 0.77 1.01 範例7 8.30 0.63 0.74 0. 9812 S 201133507 'Example 5 is similar to Example 1' except that the amount of inorganic filler (cobalt nickel titanium zinc based oxide) is 2 grams (2 wt%) and the amount of frit is 3 grams (3 wt%). [Example 6] Example 6 is similar to Example 1 except that the amount of the inorganic filler (cobalt nickel titanium zinc oxynitride) was 3 g (3 wt%) and the amount of the glass frit was 2 g (2 wt%). [Example 7] Example 7 is similar to Example 1, except that the amount of the inorganic filler (iron-based oxide) was 1 gram (lwt%) and the amount of the glass frit was 4 gram (4 wt%). [Example 8] Example 8 was similar to Example 1, except that the amount of the inorganic filler (iron-based oxide) was 2 g (2 wt%) and the amount of the glass frit was 3 g (3 wt%). [Example 9] Example 9 was similar to Example 1, except that the amount of the inorganic filler (iron-based oxide) was 3 g (3 wt%) and the amount of the glass frit was 2 g (2 wt%). [Comparative Example] The preparation of the slurry composition was similar to that of Example 1, except that the amount of the inorganic filler and the glass material was not 5 g (5 wt%). The slurry composition of Examples 1 to 9 and the slurry composition of the comparative example were printed on the screen substrate by a screen printing process and dried at a temperature of 16 (rc). Further, the temperature was processed at 85 after the rapid heat treatment process. The back electrode of the solar cell. The performance and efficiency of the back electrode of the solar cell manufactured by the above method are shown in Tables 2 and 3. 13 201133507 Table 2 Aluminum surface resistance back surface electric field resistance curve characteristics A1 surface BSF Bowing resistance resistance characteristic ( mQ) (πιΩ) (mm) Comparative Example 14.01 5.74 1.519 Example 1 12.23 6.32 1.181 Example 2 13.47 7.84 1.332 Example 3 13.34 10.63 1.298 Example 4 12.08 7. 11 1.139 Example 5 12.01 7.26 1.141 Example 6 15.24 7.90 1.126 Example 7 11.44 7.60 1.560 Example 8 13.81 8.08 1.124 Example 9 14. 60 8.40 1.184 Table 3 Short-Circuit Current Isc Open-circuit Voltage Voc Fill Factor FF Efficiency Eff. (ratio) Comparative Example 8. 34 0.62 0.74 1.00 Example 1 8. 37 0.62 0.75 1.02 14 201133507 Example 4 8.35 0.63 0.77 1.01 Example 7 8.30 0.63 0.74 0. 98
在表2和表3,效率（efficiency)是產製出的太陽能電池後之 光電轉換效率’ Isc是在無電阻下之短路電流(sh〇rt current)， V〇c是量測開路電極接頭的開路電壓（〇pen circuit v〇ltage)，FF 是填充因子（fill factor) ’填充因子是太陽能電池之實際輸出功 率與最大輸出功率的比值。 光電轉換效率的量測利用太陽光模擬器（s〇lar simulat〇r)， 表面電阻和背面電場（BSF)電阻之量測使用四點探針量測儀 (4-point probe)。此外，量測太陽能電池中心的翹曲特性是使用 針盤指示器（dial gauge)。 如表2所示’範例1至例3代表翹曲特性較優於沒有添加金 屬氧化物無機填充料的比較範例。如果增加無機填料的量，勉曲 特性可以更加改善。 導電特性為15 □或更佳，這足_於的太陽能電池。 如果添加1 wt%始鎳鈦鋅基氧化物比沒有添加钻鎳鈦鋅基 氧化物之效率提高了 1. 02倍。 另外，當麵組成物添加無機填料時，可改善背面電場(bsf) 特性。如果背面電場湖層增厚，可防止電奸復合(士伽化 recombination)與背面電場（BSF)層可作為一反射器 (reflector) ’這樣光電轉換效率得以改善。 15 5 201133507 【圖式簡單說明】 圖1為太陽能電池之剖視圖。 【主要元件符號說明】In Tables 2 and 3, the efficiency is the photoelectric conversion efficiency after the production of the solar cell' Isc is the short-circuit current (sh〇rt current) without resistance, and V〇c is the measurement of the open-circuit electrode joint. Open circuit voltage (〇pen circuit v〇ltage), FF is the fill factor (fill factor) is the ratio of the actual output power of the solar cell to the maximum output power. The photoelectric conversion efficiency was measured using a solar simulator (s〇lar simulat〇r), and the surface resistance and back surface electric field (BSF) resistance were measured using a 4-point probe. In addition, the warpage characteristic of the center of the solar cell is measured using a dial gauge. As shown in Table 2, Examples 1 to 3 represent a comparative example in which the warpage characteristics are superior to those in which no metal oxide inorganic filler is added. If the amount of the inorganic filler is increased, the tortuosity property can be further improved. The conductivity is 15 □ or better, which is enough for solar cells. If the addition of 1 wt% of the starting nickel-titanium-zinc-based oxide is increased by 1.02 times than without the addition of the nickel-titanium-zinc-based oxide. Further, when the surface composition is added with an inorganic filler, the back surface electric field (bsf) characteristics can be improved. If the back surface electric lake layer is thickened, it is possible to prevent the electrospray recombination and the back surface electric field (BSF) layer from acting as a reflector', so that the photoelectric conversion efficiency is improved. 15 5 201133507 [Simplified illustration of the drawings] Fig. 1 is a cross-sectional view of a solar cell. [Main component symbol description]
S 10 P型矽基板 11 N型半導體 12 上電極1 13 背電極 14 抗反光層 15 背面電場層 16S 10 P type germanium substrate 11 N type semiconductor 12 upper electrode 1 13 back electrode 14 anti-reflective layer 15 back electric field layer 16