TWI509816B - Solar cell with wide and narrow electrode blocks and solar cell using the same - Google Patents
Solar cell with wide and narrow electrode blocks and solar cell using the same Download PDFInfo
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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
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Description
本發明是有關於一種太陽能電池及使用其之太陽能電池模組,且特別是有關於一種具有寬窄電極區塊之太陽能電池及使用其之太陽能電池模組。The present invention relates to a solar cell and a solar cell module using the same, and more particularly to a solar cell having a wide and narrow electrode block and a solar cell module using the same.
太陽能電池是一種能量轉換的光電元件,它是經由太陽光照射後,把光的能量轉換成電能,此種光電元件稱為太陽能電池(Solar Cell)。從物理學的角度來看,有人稱之為光伏(Photovoltaic,簡稱PV)電池。A solar cell is an energy-converting photovoltaic element that converts light energy into electrical energy after being irradiated by sunlight. This photoelectric element is called a solar cell. From a physics point of view, some people call it Photovoltaic (PV) batteries.
傳統的太陽能電池的製造方式,是先提供一矽基板,然後在矽基板上進行化學氣相沈積(譬如是PECVD)以形成抗反射層,然後進行網印以及燒結(co-firing),以將電極形成於抗反射層上並使電極穿透抗反射層而電連接至矽基板。Conventional solar cells are manufactured by first providing a substrate and then performing chemical vapor deposition (such as PECVD) on the germanium substrate to form an anti-reflective layer, followed by screen printing and co-firing. An electrode is formed on the anti-reflection layer and the electrode penetrates the anti-reflection layer to be electrically connected to the germanium substrate.
進行網印時,所使用的導電膠可分為銀膠與鋁膠,銀膠主要用來當做電池的電極,在正反兩面皆有使用,而鋁膠是在背面銀電極印在矽基板後,再印上燒結後作為背面電場以增加電池效率。銀膠的成本高於鋁膠。When printing on the screen, the conductive adhesive used can be divided into silver glue and aluminum glue. Silver glue is mainly used as the electrode of the battery, which is used on both the front and the back, and the aluminum glue is printed on the back surface of the silver electrode. Then, after sintering, it is used as a back surface electric field to increase the battery efficiency. The cost of silver glue is higher than that of aluminum glue.
傳統的太陽能電池的正面電極與背面電極通常是具有均勻寬度的長方形形狀,具有均勻寬度的正面及背面電極使得網印時所使用的電極的導電膠的用量大,正面電極造成對太陽光的遮蔽率變高,背面電極造成背面電場的面積變小。所以,傳統的作法不但會提高成本,而且會降低太陽能電池的效率。此外,雖然已經有人提出 在背面電極及正面電極使用不連續區塊的作法(稱為斷續電極),但是這種作法會導致電極與焊接線焊接時的拉力變差,且正面的某些指形電極無法接觸到正面電極,造成少數載子在指形電極上面的傳輸距離變長,影響有效電流的導出。The front and back electrodes of a conventional solar cell are generally rectangular in shape having a uniform width, and the front and back electrodes having a uniform width make the electrode of the electrode used for screen printing a large amount of conductive glue, and the front electrode causes shielding of sunlight. The rate becomes high, and the area of the back surface electric field caused by the back electrode becomes small. Therefore, the traditional practice will not only increase the cost, but also reduce the efficiency of the solar cell. In addition, although it has been proposed The use of discontinuous blocks in the back and front electrodes (called interrupted electrodes), but this practice causes the tensile force of the electrode to be welded to the weld line to be poor, and some of the finger electrodes on the front side cannot touch the front side. The electrode causes a small carrier to have a long transmission distance above the finger electrode, which affects the derivation of the effective current.
本發明之一個目的是提供一種具有寬窄電極區塊之太陽能電池及使用其之太陽能電池模組,其能節省網印電極的導電膠,也可以改善太陽能電池採斷續電極之模組在焊接時的特性。An object of the present invention is to provide a solar cell having a wide and narrow electrode block and a solar cell module using the same, which can save the conductive adhesive of the screen printing electrode, and can also improve the module of the solar cell with the intermittent electrode during welding. Characteristics.
為達上述目的,本發明提供一種太陽能電池,其包含一電池本體、一條或多條匯流排電極以及多條指形電極。電池本體將光能轉換成電能而產生多個電荷。匯流排電極形成於電池本體之一正面上,並包含多個寬電極區塊及多個窄電極區塊。此等寬電極區塊彼此相互隔開,此等窄電極區塊分別位於此等寬電極區塊之間以將此等寬電極區塊電連接在一起,寬電極區塊的寬度大於窄電極區塊的寬度。指形電極形成於電池本體之正面上,並電連接至一條或多條匯流排電極。指形電極與匯流排電極收集多個電荷以供輸出。To achieve the above object, the present invention provides a solar cell comprising a battery body, one or more bus bar electrodes, and a plurality of finger electrodes. The battery body converts light energy into electrical energy to generate a plurality of charges. The bus bar electrode is formed on a front surface of the battery body and includes a plurality of wide electrode blocks and a plurality of narrow electrode blocks. The wide electrode blocks are spaced apart from each other, and the narrow electrode blocks are respectively located between the equal electrode blocks to electrically connect the equal electrode blocks together, and the width of the wide electrode block is larger than the narrow electrode area The width of the block. The finger electrode is formed on the front surface of the battery body and is electrically connected to one or more bus bar electrodes. The finger electrode and the bus bar electrode collect a plurality of charges for output.
藉由本發明之上述實施樣態,可以降低太陽能電池的正面的導電膠(銀膠)的使用量,而不會大幅影響太陽能電池模組的焊接固定力。此外,也可以降低太陽能電池的背面的銀膠的使用量,同時增加背面電場,除了提升太陽能電池的效率以外,也可以有效降低成本。With the above embodiment of the present invention, the amount of conductive paste (silver glue) on the front side of the solar cell can be reduced without significantly affecting the soldering fixing force of the solar cell module. In addition, the amount of silver paste used on the back side of the solar cell can be reduced, and the back surface electric field can be increased. In addition to improving the efficiency of the solar cell, the cost can be effectively reduced.
為讓本發明之上述內容能更明顯易懂,下文特舉一較佳實施例,並配合所附圖式,作詳細說明如下。In order to make the above description of the present invention more comprehensible, a preferred embodiment will be described below in detail with reference to the accompanying drawings.
圖1顯示依據本發明之實施例之太陽能電池之俯視圖。圖2顯示圖1的匯流排電極的放大示意圖。圖3顯示依據本發明之實施例之太陽能電池之底視圖。圖4A與4B分別顯示沿著圖1之線4A-4A及4B-4B的剖面圖。1 shows a top view of a solar cell in accordance with an embodiment of the present invention. FIG. 2 shows an enlarged schematic view of the bus bar electrode of FIG. 1. Figure 3 shows a bottom view of a solar cell in accordance with an embodiment of the present invention. 4A and 4B are cross-sectional views taken along lines 4A-4A and 4B-4B of Fig. 1, respectively.
如圖1至4B所示,本實施例之太陽能電池1包含一電池本體10、一條或多條匯流排電極20以及多條指形電極30。太陽能電池可以是單晶、多晶或薄膜式太陽能電池。As shown in FIGS. 1 to 4B, the solar cell 1 of the present embodiment includes a battery body 10, one or more bus bar electrodes 20, and a plurality of finger electrodes 30. The solar cell can be a single crystal, polycrystalline or thin film solar cell.
電池本體10能將光能轉換成電能而產生多個電荷。於本實施例中,電池本體10包含一基板11。基板11包含一第一型半導體層11A與一第二型半導體層11B。舉例而言,可以利用P型矽基板(當作第二型半導體層),利用摻雜的方式在上面形成N型半導體層(當作N型半導體層);或者,也可以使用各式各樣的沈積技術,一層又一層地使P型或N型材料成長上去。The battery body 10 is capable of converting light energy into electrical energy to generate a plurality of charges. In the embodiment, the battery body 10 includes a substrate 11. The substrate 11 includes a first type semiconductor layer 11A and a second type semiconductor layer 11B. For example, a P-type germanium substrate (as a second-type semiconductor layer) may be used to form an N-type semiconductor layer (as an N-type semiconductor layer) by doping; or, a variety of patterns may be used. The deposition technique, layer by layer, allows P-type or N-type materials to grow up.
此外,太陽能電池1更包含一抗反射層12,位於基板11之第一型半導體層11A上,一條或多條匯流排電極20及多條指形電極30貫穿抗反射層12並電連接至第一型半導體層11A。抗反射層12提供抗反射的效果,入射至抗反射層12的光不會被反射出去,以提高光線的使用率。In addition, the solar cell 1 further includes an anti-reflection layer 12 on the first type semiconductor layer 11A of the substrate 11, and one or more bus bar electrodes 20 and a plurality of finger electrodes 30 penetrate the anti-reflection layer 12 and are electrically connected to the first A type semiconductor layer 11A. The anti-reflection layer 12 provides an anti-reflection effect, and light incident on the anti-reflection layer 12 is not reflected to improve the utilization of light.
於本例子中,係以三條匯流排電極20為例子作說明, 然而,本發明並未受限於此,匯流排電極20可以是一條、兩條、四條或其他數目。匯流排電極20形成於電池本體10之一正面10A上。匯流排電極20包含多個寬電極區塊22及多個窄電極區塊24,此等寬電極區塊22彼此相互隔開,此等窄電極區塊24分別位於此等寬電極區塊22之間以將此等寬電極區塊22電連接在一起,寬電極區塊22的寬度W22大於窄電極區塊24的寬度W24。In the present example, three bus bar electrodes 20 are taken as an example for explanation. However, the present invention is not limited thereto, and the bus bar electrodes 20 may be one, two, four or other numbers. The bus bar electrode 20 is formed on one front surface 10A of the battery body 10. The bus bar electrode 20 includes a plurality of wide electrode blocks 22 and a plurality of narrow electrode blocks 24 spaced apart from each other, and the narrow electrode blocks 24 are respectively located in the same width electrode block 22 The equal width electrode blocks 22 are electrically connected together, and the width W22 of the wide electrode block 22 is larger than the width W24 of the narrow electrode block 24.
指形電極30形成於電池本體10之正面10A上,並分別地直接電連接至一條或多條匯流排電極20的此等窄電極區塊24與此等寬電極區塊22。指形電極30與匯流排電極20之間之夾角等於90度,當然也可以被設計成不等於90度以提供視覺或其他效果。多條指形電極30與一條或多條匯流排電極20收集多個電荷以供輸出。The finger electrodes 30 are formed on the front surface 10A of the battery body 10 and are directly electrically connected to the narrow electrode blocks 24 of the one or more bus bar electrodes 20 and the same wide electrode blocks 22, respectively. The angle between the finger electrode 30 and the bus bar electrode 20 is equal to 90 degrees, although it can of course be designed to be not equal to 90 degrees to provide a visual or other effect. The plurality of finger electrodes 30 and the one or more bus bar electrodes 20 collect a plurality of charges for output.
此外,太陽能電池1可以更包含一條或多條背面電極40以及一背面金屬層50。於本例子中,係以三條背面電極為例作說明,然而,本發明並未受限於此。背面電極的數目可以是一條、兩條或四條等。背面電極40形成於電池本體10之一背面10B上並電連接至第二型半導體層11B。背面10B係位於正面10A的相反面。In addition, the solar cell 1 may further include one or more back electrodes 40 and a back metal layer 50. In the present example, three back electrodes are exemplified, however, the present invention is not limited thereto. The number of back electrodes may be one, two or four, and the like. The back surface electrode 40 is formed on one back surface 10B of the battery body 10 and is electrically connected to the second type semiconductor layer 11B. The back surface 10B is located on the opposite side of the front surface 10A.
背面金屬層50形成於電池本體10之背面上,背面電極40貫穿背面金屬層50並電連接至第二型半導體層11B。The back metal layer 50 is formed on the back surface of the battery body 10, and the back surface electrode 40 penetrates the back metal layer 50 and is electrically connected to the second type semiconductor layer 11B.
此外,太陽能電池1可以更包含一周邊電極60,形成於電池本體10之正面10A上,並圍繞且電連接至匯流排電極20與多個指形電極30,有利於電荷的收集及傳 輸。於本例子中,周邊電極60大致平行於電池本體10之周邊,因此,有些部分之周邊電極60平行於匯流排電極20,而有些部分之周邊電極60垂直於匯流排電極20,如圖1所示。In addition, the solar cell 1 may further include a peripheral electrode 60 formed on the front surface 10A of the battery body 10 and surrounding and electrically connected to the bus bar electrode 20 and the plurality of finger electrodes 30, facilitating charge collection and transmission. lose. In the present example, the peripheral electrode 60 is substantially parallel to the periphery of the battery body 10. Therefore, some portions of the peripheral electrode 60 are parallel to the bus bar electrode 20, and some portions of the peripheral electrode 60 are perpendicular to the bus bar electrode 20, as shown in FIG. Show.
於本實施例中,寬電極區塊22的寬度W22介於2.0mm與3.0mm之間,特別是寬度介於2.1mm與2.5mm之間;窄電極區塊24的寬度介於0.1與0.5mm之間,特別是介於0.2與0.4mm之間。於一個例子中,窄電極區塊24的寬度實質上等於0.3mm,大於手指電極的寬度(0.07至0.08mm),寬電極區塊22的寬度實質上等於2.2mm,寬電極區塊22與窄電極區塊24的寬度都是等於2.2mm。然而,本發明並未受限於此,電極區塊22及24的長度可以依據需求調整,所有的電極區塊22/24的寬度或長度可以是相同或不同,各電極區塊的形狀除了是圖中所示的矩形(包含長方形及正方形)以外,也可以是菱形、圓形、橢圓型或點狀等等,或是由不同圖案所組成。In the present embodiment, the width W22 of the wide electrode block 22 is between 2.0 mm and 3.0 mm, in particular between 2.1 mm and 2.5 mm; the width of the narrow electrode block 24 is between 0.1 and 0.5 mm. Between, especially between 0.2 and 0.4mm. In one example, the width of the narrow electrode block 24 is substantially equal to 0.3 mm, greater than the width of the finger electrode (0.07 to 0.08 mm), the width of the wide electrode block 22 is substantially equal to 2.2 mm, and the wide electrode block 22 is narrow. The width of the electrode block 24 is equal to 2.2 mm. However, the present invention is not limited thereto, and the lengths of the electrode blocks 22 and 24 can be adjusted according to requirements. The width or length of all the electrode blocks 22/24 can be the same or different, and the shape of each electrode block is In addition to the rectangles (including rectangles and squares) shown in the figure, they may be diamonds, circles, ellipses or dots, or the like, or may be composed of different patterns.
值得注意的是,圖1的線4A-4A有切到窄電極區塊24但沒有切到寬電極區塊22,而圖1的線4B-4B沒有切到窄電極區塊24,但有切到寬電極區塊22。所以圖4A與4B會有些微的差異,如圖所示。It should be noted that the line 4A-4A of FIG. 1 has a slit to the narrow electrode block 24 but not to the wide electrode block 22, and the line 4B-4B of FIG. 1 does not cut to the narrow electrode block 24, but has a cut. To the wide electrode block 22. So Figures 4A and 4B will be slightly different, as shown.
當將多個太陽能電池1串聯起來時,電池本體10的正面10A的匯流排電極20的連接到相鄰一片太陽能電池的背面電極40,依此類推,即可組成一個太陽能電池模組。When a plurality of solar cells 1 are connected in series, the bus bar electrodes 20 of the front surface 10A of the battery body 10 are connected to the back electrode 40 of an adjacent one of the solar cells, and so on, to form a solar cell module.
圖5顯示依據本發明之實施例之太陽能電池模組之 側視示意圖。圖6顯示依據本發明之實施例之太陽能電池模組之局部俯視示意圖。如圖5與6所示,本發明亦提供一種太陽能電池模組100,包含多個太陽能電池1以及多條導電帶(Ribbon)70。導電帶70的數目取決於所欲焊接的匯流排電極20的數目或背面電極的數目。導電帶70將此等太陽能電池1的其中一片的匯流排電極20電連接至此等太陽能電池1的其中另一片的背面電極40,導電帶70被焊接至匯流排電極20及背面電極40上。於本實施例中,導電帶70的寬度(約2.0mm)介於寬電極區塊22的寬度(約2.2mm)與窄電極區塊24的寬度(約0.3mm)之間,但本發明不以此為限。導電帶70的寬度可以任意被選擇,只要能達成焊接及保有適當的焊接強度即可。於本實施例中,即使因為製程的因素造成導電帶70與窄電極區塊24的焊接效果不能媲美導電帶70與寬電極區塊22的焊接效果而使得導電帶70與匯流排電極20的固定力量會有階梯狀的分佈,但是導電帶70已經可以穩固地被焊接在寬電極區塊22,且窄電極區塊24仍能提供一定的焊接固定力,故總體而言仍能有效提供太陽能電池模組所需要的焊接效果。值得注意的是,利用窄電極區塊24來橋接相鄰的寬電極區塊22,也可以減少某些電荷載子在指形電極30上傳輸的距離,能迅速且有效地將電荷導出以形成輸出電流,也能使得焊接固定力的分佈不會有太大的落差,而能在模組的可靠度與成本方面得到最佳化的效果。FIG. 5 shows a solar cell module according to an embodiment of the present invention. Side view. 6 is a partial top plan view of a solar cell module in accordance with an embodiment of the present invention. As shown in FIGS. 5 and 6, the present invention also provides a solar cell module 100 comprising a plurality of solar cells 1 and a plurality of conductive strips 70. The number of conductive strips 70 depends on the number of busbar electrodes 20 to be soldered or the number of backside electrodes. The conductive tape 70 electrically connects the bus bar electrodes 20 of one of the solar cells 1 to the back electrode 40 of the other of the solar cells 1, and the conductive tape 70 is soldered to the bus bar electrode 20 and the back electrode 40. In the present embodiment, the width (about 2.0 mm) of the conductive strip 70 is between the width of the wide electrode block 22 (about 2.2 mm) and the width of the narrow electrode block 24 (about 0.3 mm), but the present invention does not. This is limited to this. The width of the conductive strip 70 can be arbitrarily selected as long as welding can be achieved and proper soldering strength can be maintained. In the present embodiment, even if the welding effect of the conductive strip 70 and the narrow electrode block 24 is not comparable to the soldering effect of the conductive strip 70 and the wide electrode block 22 due to process factors, the conductive strip 70 and the bus bar electrode 20 are fixed. The force will have a stepped distribution, but the conductive strip 70 can be firmly soldered to the wide electrode block 22, and the narrow electrode block 24 can still provide a certain welding fixing force, so that the solar cell can still be effectively provided as a whole. The welding effect required by the module. It should be noted that the use of the narrow electrode block 24 to bridge the adjacent wide electrode block 22 can also reduce the distance that some charge carriers are transported on the finger electrode 30, and can quickly and efficiently conduct the charge to form. The output current can also make the distribution of the welding fixed force not much different, and can be optimized in terms of reliability and cost of the module.
圖7顯示依據本發明之另一實施例之太陽能電池之 底視圖。如圖7所示,背面電極亦可採用類似匯流排電極的圖案。因此,背面電極40包含多個寬區塊42及多個窄區塊44,此等寬區塊42彼此相互隔開,此等窄區塊44分別位於此等寬區塊42之間以將此等寬區塊42電連接在一起,寬區塊42的寬度大於窄區塊44的寬度。於本實施例中,背面電極的寬度大於匯流排電極的寬度,但本發明並未特別受限於此。於本實施例中,可以降低背面的銀膠的使用量,並增加背面金屬層的面積,以提升背面電場,增加太陽能電池的效率。Figure 7 shows a solar cell according to another embodiment of the present invention. Bottom view. As shown in FIG. 7, the back electrode may also adopt a pattern similar to the bus bar electrode. Therefore, the back electrode 40 includes a plurality of wide blocks 42 and a plurality of narrow blocks 44 spaced apart from each other, and the narrow blocks 44 are respectively located between the equal width blocks 42 to The equal width blocks 42 are electrically connected together, and the width of the wide block 42 is greater than the width of the narrow block 44. In the present embodiment, the width of the back surface electrode is larger than the width of the bus bar electrode, but the present invention is not particularly limited thereto. In this embodiment, the amount of silver paste used on the back surface can be reduced, and the area of the back metal layer can be increased to increase the back surface electric field and increase the efficiency of the solar cell.
圖8與9顯示依據本發明之其他實施例之太陽能電池之俯視圖。如圖8所示,本例子的太陽能電池具有兩個匯流排電極20。如圖9所示,本例子的太陽能電池具有四個匯流排電極20。這表示本發明的實施例的電極可以應用到任何的場合,符合各場合的設計需求。8 and 9 show top views of solar cells in accordance with other embodiments of the present invention. As shown in FIG. 8, the solar cell of the present example has two bus bar electrodes 20. As shown in FIG. 9, the solar cell of the present example has four bus bar electrodes 20. This means that the electrodes of the embodiments of the present invention can be applied to any occasion, meeting the design requirements of each occasion.
藉由本發明之上述太陽能電池,可以降低太陽能電池的正面的導電膠(銀膠)的使用量,而不會大幅影響太陽能電池模組的焊接固定力。此外,也可以降低太陽能電池的背面的銀膠的使用量,同時增加背面電場,除了提升太陽能電池的效率以外,也可以有效降低成本。According to the solar cell of the present invention, the amount of the conductive paste (silver paste) on the front surface of the solar cell can be reduced without greatly affecting the soldering fixing force of the solar cell module. In addition, the amount of silver paste used on the back side of the solar cell can be reduced, and the back surface electric field can be increased. In addition to improving the efficiency of the solar cell, the cost can be effectively reduced.
在較佳實施例之詳細說明中所提出之具體實施例僅用以方便說明本發明之技術內容,而非將本發明狹義地限制於上述實施例,在不超出本發明之精神及以下申請專利範圍之情況,所做之種種變化實施,皆屬於本發明之範圍。The specific embodiments of the present invention are intended to be illustrative only and not to limit the invention to the above embodiments, without departing from the spirit of the invention and the following claims. The scope of the invention and the various changes made are within the scope of the invention.
1‧‧‧太陽能電池1‧‧‧Solar battery
4A-4A、4B-4B‧‧‧線Line 4A-4A, 4B-4B‧‧‧
10‧‧‧電池本體10‧‧‧ battery body
10A‧‧‧正面10A‧‧‧ positive
10B‧‧‧背面10B‧‧‧Back
11‧‧‧基板11‧‧‧Substrate
11A‧‧‧第一型半導體層11A‧‧‧first type semiconductor layer
11B‧‧‧第二型半導體層11B‧‧‧Second type semiconductor layer
12‧‧‧抗反射層12‧‧‧Anti-reflective layer
20‧‧‧匯流排電極20‧‧‧ Bus bar electrode
22‧‧‧寬電極區塊22‧‧‧ Wide electrode block
24‧‧‧窄電極區塊24‧‧‧Narrow electrode block
30‧‧‧指形電極30‧‧‧Finger electrode
40‧‧‧背面電極40‧‧‧Back electrode
42‧‧‧寬區塊42‧‧‧ wide block
44‧‧‧窄區塊44‧‧‧Narrow block
50‧‧‧背面金屬層50‧‧‧Back metal layer
60‧‧‧周邊電極60‧‧‧ peripheral electrodes
70‧‧‧導電帶70‧‧‧ Conductive tape
100‧‧‧太陽能電池模組100‧‧‧Solar battery module
圖1顯示依據本發明之實施例之太陽能電池之俯視圖。1 shows a top view of a solar cell in accordance with an embodiment of the present invention.
圖2顯示圖1的匯流排電極的放大示意圖。FIG. 2 shows an enlarged schematic view of the bus bar electrode of FIG. 1.
圖3顯示依據本發明之實施例之太陽能電池之底視圖。Figure 3 shows a bottom view of a solar cell in accordance with an embodiment of the present invention.
圖4A與4B分別顯示沿著圖1之線4A-4A及4B-4B的剖面圖。4A and 4B are cross-sectional views taken along lines 4A-4A and 4B-4B of Fig. 1, respectively.
圖5顯示依據本發明之實施例之太陽能電池模組之側視示意圖。Figure 5 shows a side view of a solar cell module in accordance with an embodiment of the present invention.
圖6顯示依據本發明之實施例之太陽能電池模組之局部俯視示意圖。6 is a partial top plan view of a solar cell module in accordance with an embodiment of the present invention.
圖7顯示依據本發明之另一實施例之太陽能電池之底視圖。Figure 7 shows a bottom view of a solar cell in accordance with another embodiment of the present invention.
圖8與9顯示依據本發明之其他實施例之太陽能電池之俯視圖。8 and 9 show top views of solar cells in accordance with other embodiments of the present invention.
1‧‧‧太陽能電池1‧‧‧Solar battery
4A-4A、4B-4B‧‧‧線Line 4A-4A, 4B-4B‧‧‧
10‧‧‧電池本體10‧‧‧ battery body
10A‧‧‧正面10A‧‧‧ positive
12‧‧‧抗反射層12‧‧‧Anti-reflective layer
20‧‧‧匯流排電極20‧‧‧ Bus bar electrode
22‧‧‧寬電極區塊22‧‧‧ Wide electrode block
24‧‧‧窄電極區塊24‧‧‧Narrow electrode block
30‧‧‧指形電極30‧‧‧Finger electrode
60‧‧‧周邊電極60‧‧‧ peripheral electrodes
Claims (12)
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Citations (4)
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JPH06318723A (en) * | 1993-05-07 | 1994-11-15 | Canon Inc | Photovoltaic element and its manufacture |
JP2007103473A (en) * | 2005-09-30 | 2007-04-19 | Sanyo Electric Co Ltd | Solar cell device and solar cell module |
JP2010238938A (en) * | 2009-03-31 | 2010-10-21 | Sanyo Electric Co Ltd | Solar cell, solar cell module, and solar cell system |
TWM402499U (en) * | 2010-10-15 | 2011-04-21 | Big Sun Energy Tech Inc | Solar cell with three bus bars |
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JPH06318723A (en) * | 1993-05-07 | 1994-11-15 | Canon Inc | Photovoltaic element and its manufacture |
JP2007103473A (en) * | 2005-09-30 | 2007-04-19 | Sanyo Electric Co Ltd | Solar cell device and solar cell module |
JP2010238938A (en) * | 2009-03-31 | 2010-10-21 | Sanyo Electric Co Ltd | Solar cell, solar cell module, and solar cell system |
TWM402499U (en) * | 2010-10-15 | 2011-04-21 | Big Sun Energy Tech Inc | Solar cell with three bus bars |
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