M426876 ____ --101年02身20日核正替^頁 五、新型說明： 【新型所屬之技術領域】 [0001] 本揭露是有關於一種太陽能電池，特別是有關於一種具 有低電極漿料成本之太陽能電池。 【先前技術】 [0002] 近年來，由於環境污染的問題越來越嚴重，很多國家開 始開發新的綠色能源來減少境污染的問題。太陽能電池 可將太陽的光能轉為電能’且這種轉換不會產生任何污 染性的物質，因此太陽能電池逐漸受到重視。 · 太陽能電池是利用半導體的光電效應直接吸收太陽光來 發電。太陽能電池之發電原理是當太陽光照射在太陽能 電池上時，太陽能電池會吸收太陽光能產生電洞電子對 ’藉由ΡΝ接面的内建電場，使電子與電洞分離來形成光 電流。 在太陽能電池的製造過程中，通常會利用網版印刷的方 式’來於半導體基板上形成匯流電極（bus electrode) 和指狀電極（finger eiectro(}e)，其中指狀電極係用 ® 以收集因光電效應所產生的光電流，並將其傳送至匯流 電極’而匯流電極則用以將指狀電極所收集的光電流傳 送到外部裝置。一般而言，匯流電極之寬度大於指狀電 極寬度的兩倍以上。 然而’目前的導電漿料，其價格非常昂貴，加上目前太 陽能產業中銀漿料之成本日益高漲，因此極需要一種使 用較少電極漿料的太陽能電池。 【新型内容】 10022100#單編號 A0101 第4頁/共19頁 1013064452-0 [0003] 太虹⑴ 101年.02月20日修正替換頁 义之一方面是在提供於-種太陽能^，以利用較 ~ ^的電極聚料來製作太陽能電池的匯流電極，達到降低 太陽能電池之製造成本的效果。 根據本新型之一實施例，此太陽能電池包含半導體基板 、複數條正面匯流電極以及複數條背面®流電極。正面 匯机電極係設置於半導體基板之第—表面上，其中匯流 極包3至少一條裸空電極線，此裸空電極線具有至少 一個開口。背面匯流電極係設置於該半導體基板之第二 . 表面上，其中第二表面係相對於第一表面，背面匯流電 極包含至少一條虛線電極線，此虛線電極線係由複數條 不相連之金屬線所構成，且每兩相鄰之金屬線間具有間 隙。 由上述說明可知，本新型實施例係將匯流電極製成裸空 型態或虛線型態，以減少電極漿料的使用量，同時仍可 維持正常的發電效率。 【實施方式】 I [0004] 請同時參照第ia圖和第lb圖，第la圖係繪示根據本新型 實施例之太陽能電池100的俯視結構示意圖，第lb圖係繪 示根據本新型實施例之太陽能電池100的仰視結構示意圖 。太陽能電池100包含半導體基板110、正面匯流電極 120、指狀電極130以及背面匯流電極140。正面匯流電 極120和指狀電極130係設置於半導體基板110的表面112 上，而背面匯流電極140係設置於半導體基板110的表面 114上，其中表面112係相對於表面114。 在本實施例中，正面匯流電極丨20係互相平行且與指狀電 極130垂直交又，但本新型之實施例並不受限於此。在本 10022100#*單編號 A0101 第 5 頁 / 共 19 頁 1013064452-0 M426876 年，02贵.20’:日、核1 正替換頁 新型之其它實施例中，正面匯流電極12〇可不互相平行， 也不需與垂直。類似地，在本實施例中，背面匯流電極 140係互相平行’但在本新型其他實施例中，背面匯流電 極140可不互相平行》而上述之正面匯流電極120與背面 匯流電極140亦可不用像第ia、lb圖般成等寬之態樣，亦 即可設計為寬度不等之型態如波浪狀、鋸齒狀、或是階 梯狀。 正面匯流電極120包含裸空電極線122和實線電極線124 。裸空電極線122為包含複數個開口 i22a，這些開口 _ 122a可例如為矩形、圓形或橢圓形等其他不同之形狀設 計。 請參照第lc圖，其係繪示第ia圖中虛線部份的結構放大 圖。如第lc圖所示，裸空電極線122之開口 122a具有寬 度b ’而裸空電極線122最窄處和最寬處的寬度分別為(!和 e，則最窄處寬度可以下式來表示： d=(e-b)/2 (1) 其中開口寬度b係大於或等於指狀電極13〇之寬度。 | 1013064452-0 請回到第lb圖’背面匯流電極140包含虛線電極線142和 實線電極線144。虛線電極線142係由複數條不相連之金 屬線142a所構成’且每兩相鄰之金屬線i42a之間具有間 隙142b0間隙142b在表面114上的位置係對應至開口 122a在表面112上的位置。例如，從開口i22a在表面112 上的位置垂直投影至表面114上，即可得到間隙142b在表 面114上的位置》藉由此開口與間隙的對應關係，當銲條 (ribbon)被銲接至正面匯流電極120和背面匯流電極14〇 後’當工作人員利用銲條來移動太陽能電池1〇〇時，施加 10022100#單编號删1 第6頁/共19頁 M426876M426876 ____ --101 years 02 body 20th nuclear replacement ^ page five, new description: [new technology field] [0001] The disclosure relates to a solar cell, especially related to a low electrode paste cost Solar battery. [Prior Art] [0002] In recent years, as the problem of environmental pollution has become more and more serious, many countries have begun to develop new green energy sources to reduce the problem of environmental pollution. Solar cells can turn the sun's light energy into electrical energy' and this conversion does not produce any pollutants, so solar cells are gaining attention. · Solar cells use the photoelectric effect of semiconductors to directly absorb sunlight to generate electricity. The principle of solar cell power generation is that when sunlight is irradiated on a solar cell, the solar cell absorbs sunlight and generates a hole electron pair. By the built-in electric field of the junction, the electron is separated from the hole to form a photocurrent. In the manufacturing process of solar cells, a screen printing method is generally used to form a bus electrode and a finger electrode (finger eiectro (}e) on a semiconductor substrate, wherein the finger electrodes are collected by ® The photocurrent generated by the photoelectric effect is transmitted to the bus electrode ', and the bus electrode is used to transfer the photocurrent collected by the finger electrode to the external device. Generally, the width of the bus electrode is larger than the width of the finger electrode More than twice. However, 'the current conductive paste, its price is very expensive, and the current cost of silver paste in the solar industry is increasing, so there is a great need for a solar cell using less electrode paste. [New content] 10022100 #单编号A0101 Page 4/Total 19 Page 1013064452-0 [0003] Taihong (1) 101. February 20th One of the amendments to the page definition is provided in the solar energy ^ to utilize the electrode of ~ ^ Polymerizing the bus electrode of the solar cell to reduce the manufacturing cost of the solar cell. According to an embodiment of the present invention, the solar cell includes a conductor substrate, a plurality of front side bus electrodes, and a plurality of back side flow electrodes. The front side sink electrodes are disposed on the first surface of the semiconductor substrate, wherein the bus bar package 3 has at least one bare empty electrode line, and the bare empty electrode lines have at least An opening. The back side bus electrode is disposed on the second surface of the semiconductor substrate, wherein the second surface is opposite to the first surface, and the back side bus electrode comprises at least one dashed electrode line, the dashed line is not connected by the plurality of lines The metal wire is formed, and there is a gap between each two adjacent metal wires. It can be seen from the above description that the current embodiment is to make the bus electrode into a bare empty or dashed type to reduce the amount of electrode slurry used. At the same time, the normal power generation efficiency can be maintained. [Embodiment] I [0004] Please refer to both the ia diagram and the lb diagram, and the first diagram shows a schematic structure of the solar cell 100 according to the embodiment of the present invention. 1b is a schematic bottom view of a solar cell 100 according to an embodiment of the present invention. The solar cell 100 includes a semiconductor substrate 110, The surface bus electrode 120, the finger electrode 130, and the back side bus electrode 140. The front side bus electrode 120 and the finger electrode 130 are disposed on the surface 112 of the semiconductor substrate 110, and the back side bus electrode 140 is disposed on the surface 114 of the semiconductor substrate 110. The surface 112 is opposite to the surface 114. In this embodiment, the front bus electrodes 20 are parallel to each other and perpendicular to the finger electrodes 130, but the embodiment of the present invention is not limited thereto. In this 10022100 #*单编号A0101 Page 5 / Total 19 Page 1013064452-0 M426876 Year, 02 expensive. 20': Day, Core 1 Positive Replacement Page In other new embodiments, the front side bus electrodes 12〇 may not be parallel to each other, nor need With vertical. Similarly, in the present embodiment, the back side bus electrodes 140 are parallel to each other. However, in other embodiments of the present invention, the back side bus electrodes 140 may not be parallel to each other, and the front side bus electrode 120 and the back side bus electrode 140 may not be the same. The ia and lb diagrams can be designed to be of equal width, and can also be designed as unequal widths such as wavy, jagged, or stepped. The front bus electrode 120 includes a bare empty electrode line 122 and a solid line electrode line 124. The bare empty electrode line 122 is comprised of a plurality of openings i22a, which may be, for example, rectangular, circular or elliptical in other different shapes. Please refer to the figure lc, which shows an enlarged view of the structure of the dotted line in the ia diagram. As shown in FIG. 1c, the opening 122a of the bare empty electrode line 122 has a width b' and the widths of the narrowest and widest portions of the bare empty electrode line 122 are (! and e, respectively, and the narrowest width can be Represents: d = (eb) / 2 (1) where the opening width b is greater than or equal to the width of the finger electrode 13 。. | 1013064452-0 Please return to the lb diagram 'the back side bus electrode 140 includes the dashed electrode line 142 and the real The wire electrode line 144. The dotted wire electrode line 142 is composed of a plurality of unconnected metal wires 142a' and has a gap 142b0 between each two adjacent metal wires i42a. The position of the gap 142b on the surface 114 corresponds to the opening 122a. The position on the surface 112. For example, the position of the opening i22a on the surface 112 is perpendicularly projected onto the surface 114, so that the position of the gap 142b on the surface 114 can be obtained by the correspondence between the opening and the gap, when the electrode (ribbon) ) is soldered to the front side bus electrode 120 and the back side bus electrode 14 ' 'When the worker uses the electrode to move the solar cell 1 ,, apply 10022100# single number delete 1 page 6 / 19 pages M426876
101年.02月20日按正_頁 至半導體基板110表面112和114的應力會互相平衡，如 此可避免太陽能電池100因應力不平衡而受損。 由上述說明可知，本實施例之太陽能電池100包含有裸空 電極線122和虛線電極線142，而裸空電極線122和虛線 電極線142包含有開口 122a和間隙142b，如此裸空電極 線122和虛線電極線142可使用較少的電極漿料來製成(相 較於實線電極線124和144)，從而減少了太陽能電池1〇〇 的製造成本》另外，由於開口 122a與間隙142b的係相應 地設置，因此太陽能電池100也不會因為電極漿料的節省 而出現因應力不平衡而破損的情況。 請同時參照第2a®和第2b圖，第2a圖係繪示根據本新型 實施例之太陽能電池200的俯視結構示意圖，第2b圖係繪 示根據本新型實施例之太陽能電池2〇〇的仰視結構示意圖 。太陽能電池2(m係類似於太陽能電池1〇〇，但不同之處 在於太陽能電池200有兩條裸空電極線122和兩條虛線電 極線142。 對半導體基板110之表面112而言，兩條裸空電極線122 係將實線電極線124夾設於其間，且彼此的開口i22a係互 相對齊’如此透過銲條而施加於半導體基板Η〇表面112 上的應力便會互相平衡。 對半導體基板110之表面114而言，兩條虛線電極線142 係將實線電極線144夾設於其間，且彼此的金屬線〗42a係 互相對齊，如此透過銲條而施加於半導體基板11〇表面 114上的應力便會互相平衡。 請同時參照第3a圖和第3b圖，第3a圖係繪示根據本新型 實施例之太陽能電池3〇〇的俯視結構示意圖，第北圖係繪 10022100#單編號 A0101 1013064452-0 M426876 i01年.Ό2月20日梭ΐΕ替換胥 示根據本新型實施例之太陽能電池300的仰視結構示意圖 。太陽能電池300係類似於太陽能電池1〇〇，但不同之處 在於太陽能電池200之半導體基材110的表面112係設置 有兩條實心電極線124,而半導體基材11〇的表面114亦 設置有兩條實心電極線144。 對半導體基板110之表面112而言，兩條實心電極線124 係將裸空電極線122央設於其間，如此對稱性的設置可使 透過銲條而施加於半導體基板110表面112上的應力互相 平衡。類似地’對半導體基板110之表面114而言，兩條 實心電極線144係將虛線電極線142夾設於其間，如此對 籲 稱性的設置可使透過銲條而施加於半導體基板110表面 114上的應力互相平衡。綜合以上所述，本新型實施例之 太陽能電池包含有裸空電極線和虛線電極線，而裸空電 極線和虛線電極線可利用較少的電極漿料來製成，如此 可郎省太1%此電池的製造成本。再者，本新型實施例之 太陽能電池的裸空電極線、虛線電極線或實心電極線係The stresses on the surfaces 112 and 114 of the semiconductor substrate 110 are balanced with each other on the basis of the positive and negative pages of the semiconductor substrate 110, so that the solar cell 100 can be prevented from being damaged due to stress imbalance. As can be seen from the above description, the solar cell 100 of the present embodiment includes a bare empty electrode line 122 and a dashed electrode line 142, and the bare empty electrode line 122 and the dashed electrode line 142 include an opening 122a and a gap 142b, such that the bare empty electrode line 122 And the dashed electrode line 142 can be made using less electrode paste (compared to the solid line electrodes 124 and 144), thereby reducing the manufacturing cost of the solar cell 1". In addition, due to the opening 122a and the gap 142b Since it is provided correspondingly, the solar cell 100 does not suffer from stress imbalance due to the saving of the electrode slurry. Please refer to FIG. 2a and FIG. 2b simultaneously. FIG. 2a is a schematic top view of the solar cell 200 according to the embodiment of the present invention, and FIG. 2b is a bottom view of the solar cell 2 according to the embodiment of the present invention. Schematic. The solar cell 2 (m is similar to the solar cell 1 〇〇, but the difference is that the solar cell 200 has two bare empty electrode lines 122 and two dashed electrode lines 142. For the surface 112 of the semiconductor substrate 110, two The bare empty electrode lines 122 are sandwiched between the solid line electrode lines 124, and the openings i22a of each other are aligned with each other. Thus, the stress applied to the surface 112 of the semiconductor substrate by the electrodes is balanced with each other. For the surface 114, the two dashed electrode lines 142 are sandwiched between the solid electrode lines 144, and the metal lines 42a of each other are aligned with each other, so that the stress applied to the surface 114 of the semiconductor substrate 11 through the electrodes is such that Please refer to the 3a and 3b drawings at the same time. The 3a is a schematic top view of the solar cell 3〇〇 according to the embodiment of the present invention. The north diagram is 10022100# single number A0101 1013064452- 0 M426876 i01年. ΌFebruary 20th Pike replacement shows a bottom view of a solar cell 300 according to the present embodiment. The solar cell 300 is similar to a solar cell. 〇, but the difference is that the surface 112 of the semiconductor substrate 110 of the solar cell 200 is provided with two solid electrode lines 124, and the surface 114 of the semiconductor substrate 11 is also provided with two solid electrode lines 144. In the case of the surface 112 of the 110, the two solid electrode lines 124 are disposed with the bare empty electrode lines 122 therebetween, so that the symmetrical arrangement allows the stresses applied to the surface 112 of the semiconductor substrate 110 through the electrodes to be balanced with each other. 'For the surface 114 of the semiconductor substrate 110, the two solid electrode lines 144 are sandwiched between the dashed electrode lines 142, so that the arrangement of the callability can be applied to the surface 114 of the semiconductor substrate 110 through the electrode. In combination with the above, the solar cell of the novel embodiment includes a bare empty electrode line and a dashed electrode line, and the bare empty electrode line and the dashed electrode line can be made with less electrode paste, so Too much 1% of the manufacturing cost of the battery. Furthermore, the bare empty electrode line, the dotted line electrode line or the solid electrode line system of the solar cell of the novel embodiment
於半導體基板上呈現對稱性的排列方式，如此透過銲條 I 而施加於半導體基板表面的應力可互相平衡，進而避免 太陽能電池毀損。 當然，本新型之正面與背面的匯流電極於實施上，並不 爻限於兩條或二條，亦即三條以上之匯流電極亦可。此 外，正面匯流電極之裸空電極線122之開口 122&也可設計 成對應至背面匯流電極之虛線電極線142的金屬線1423， 而使該些開口 122a與該些間隙142b之間形成上下交錯間 隔之對應型態，如第4a圖和第牝圖所示。並且，於本新 型之第二實施例如第2a、2b圖中，位於電池基板左、右 10〇22100产單編號A01〇l 第8頁/共19頁 1013064452-0 M426876 ____ 101年.02月20日俊正雖頁 兩側處的兩正面匯流電極之裸空電極線122之開口 122a亦 可。又成左右父錯間隔之型態’亦即例如左側裸空電極 線122之開a 122a係對應到右側裸空電極線122之非開口 即實心電極線處，如第5圖所示。另外，本新型的正面匯 流電極之裸空電極線122與背面匯流電極之虛線電極線. 142亦可不用設計為上下直接對應之方式，例如採用正面 之裸空電極線122對應至電池背面係為實線電極線144， 而兔面之虛線電極線142對應至正面係為實線電極線124 _ 等型態。菖然’上述不同之變化型態可視康商於研究、 技術、製程、市場、成本等方面之需求而進行變更設計 ，亦即此類之調整皆在本新型之技術範疇之内。 再者，本新型中所提及之半導體基板1〇〇、2〇〇 ' 3〇〇等 ，於太陽能電池之製程上，除本新型上述提及之電極設 置步驟外’尚有表面粗糖化、擴散形成PN接面、執行隔 離製程、形成抗反射層其他相關步驟，然此皆為本領域 所公知之技術，故於此不再額外贅言。 • 雖然本新型已以數個實施例揭露如上，然其並非用以限 定本新型，在本新型所屬技術領域中任何具有通常知識 者，在不脫離本新型之精神和範圍内，當可作各種之更 動與潤飾，因此本新型之保護範圍當視後附之申請專利 範圍所界定者為準。 【圖式簡單說明】 [_]為讓本新型之上述和其他目的、特徵、和優點能更明顯 易懂，上文特舉數個較佳實施例，並配合所附圖式作 詳細說明如下： _H)#單編號:&圖係繪示根據^新型實施例之太陽能電池的俯視結 第9頁/共19頁 1013064452-0 M426876 10l·年(32月20&修正销^頁 構示意圖。 第lb圖係繪示根據本新型實施例之太陽能電池的仰視結 構示意圖° 第lc圖係繪示第以圖_虛線部份的結構放大圖。 第2a圖係繪示根據本新型實施例之太陽能電池的俯視結 構示意圖。 第2b圖係繪示根據本新型實施例之太陽能電池的仰視結 構示意圖。The symmetry arrangement is exhibited on the semiconductor substrate, so that the stress applied to the surface of the semiconductor substrate through the electrode I can be balanced with each other, thereby preventing the solar cell from being damaged. Of course, the front and back bus electrodes of the present invention are not limited to two or two, that is, three or more bus electrodes. In addition, the opening 122& of the bare empty electrode line 122 of the front side bus electrode may also be designed to correspond to the metal line 1423 of the dashed electrode line 142 of the back side bus electrode, so that the openings 122a and the gaps 142b are vertically staggered. The corresponding type of interval, as shown in Figure 4a and Figure 。. Further, in the second embodiment of the present invention, for example, in the second and second drawings, the battery substrate is located on the left and right sides of the battery. 10〇22100, the order number A01〇l, page 8/19 pages, 1013064452-0, M426876, ____101.02, 20 Sun Jun is also able to open the opening 122a of the bare empty electrode line 122 of the two front side bus electrodes at both sides of the page. Further, the pattern of left and right fathers is spaced apart, that is, for example, the opening a 122a of the left bare electrode line 122 corresponds to the non-opening of the right bare electrode line 122, that is, the solid electrode line, as shown in FIG. In addition, the bare air electrode line 122 of the front side bus electrode of the present invention and the dashed electrode line line 142 of the back side bus electrode may not be designed to directly correspond to the upper and lower sides. For example, the bare metal electrode line 122 on the front side corresponds to the back side of the battery. The solid line electrode line 144, and the dashed line electrode line 142 of the rabbit face corresponds to the front side of the solid line electrode line 124_. The above-mentioned different types of changes can be changed according to the needs of research, technology, process, market, cost, etc., that is, such adjustments are within the technical scope of the present invention. Furthermore, the semiconductor substrate 1〇〇, 2〇〇' 3〇〇, etc. mentioned in the present invention has a surface roughening, in addition to the electrode setting steps mentioned above in the solar cell process, Other related steps of diffusing to form a PN junction, performing an isolation process, and forming an anti-reflection layer are all techniques well known in the art, so no further rumors are made here. The present invention has been disclosed in the above several embodiments, but it is not intended to limit the present invention, and any one of ordinary skill in the art to which the present invention pertains can be made variously without departing from the spirit and scope of the present invention. Modifications and refinements, therefore, the scope of protection of this new type is subject to the definition of the scope of the patent application. BRIEF DESCRIPTION OF THE DRAWINGS [_] The above and other objects, features, and advantages of the present invention will become more apparent and understood. : _H) #单编号: & diagram showing the top view of the solar cell according to the new embodiment, page 9 / 19 pages 1013064452-0 M426876 10l · year (32 months & correction pin ^ page structure diagram. Figure lb is a bottom view of a solar cell according to an embodiment of the present invention. Figure lc is an enlarged view of the structure of the dotted line. Figure 2a is a view of the solar energy according to the embodiment of the present invention. FIG. 2b is a schematic bottom view of a solar cell according to an embodiment of the present invention.
第3a圖係繪示根據本新型實施例之太陽能電池的俯視結 構示意圖。 第3b圖係繪示根據本新型實施例之太陽能電池的仰視結 構示意圖。 第4a圖係繪示根據本新型實施例之太陽能電池的俯視結 構示意圖。 第4b圖係繪示根據本新型實施例之太陽能電池的仰視結 構示意圖。Fig. 3a is a schematic plan view showing a solar cell according to an embodiment of the present invention. Fig. 3b is a schematic bottom view showing the structure of a solar cell according to an embodiment of the present invention. Fig. 4a is a schematic plan view showing the solar cell according to the embodiment of the present invention. Fig. 4b is a schematic bottom view showing the structure of a solar cell according to an embodiment of the present invention.
第5圖係繪示根據本新型實施例之太陽能電池的俯視結構 示意圖。 【主要元件符號說明】 [0006] 100 :太陽能電池 no :半導體基ΐ -- 112 :表面 114 :表面 12 0 :正面匯流電極 122 :裸空電極線 122a :開口 124 :實線電極線 130 :指狀電極 142b :間隙 140 :背面匯流電極 144 :實線電極線 142a :金屬線 :太陽能電池 U0TOI r 10 I 1013064452-0 臓21〇(#單编號A〇101 M426876 101年.02月20日按正替换頁 142 :虛線電極線 200 :太陽能電池 b:開口寬度 e:裸空電極線最寬處寬度 d:裸空電極線最窄處寬度Fig. 5 is a schematic plan view showing a solar cell according to an embodiment of the present invention. [Main component symbol description] [0006] 100: Solar cell no: Semiconductor substrate - 112: Surface 114: Surface 12 0: Front bus electrode 122: Bare empty electrode line 122a: Opening 124: Solid line electrode line 130: Electrode electrode 142b: gap 140: back side bus electrode 144: solid line electrode line 142a: metal line: solar cell U0TOI r 10 I 1013064452-0 臓21〇 (#单号A〇101 M426876 101年.02月20日Positive replacement page 142: dotted electrode line 200: solar cell b: opening width e: width at the widest point of the bare empty electrode line d: width at the narrowest point of the bare empty electrode line
1〇〇22Κ^單編號A_ 第11頁/共19頁 1013064452-01〇〇22Κ^单号A_ Page 11 of 19 1013064452-0