JP6940166B2 - P型太陽電池電極形成用組成物、これを用いて製造された電極及びp型太陽電池 - Google Patents
P型太陽電池電極形成用組成物、これを用いて製造された電極及びp型太陽電池 Download PDFInfo
- Publication number
- JP6940166B2 JP6940166B2 JP2018565749A JP2018565749A JP6940166B2 JP 6940166 B2 JP6940166 B2 JP 6940166B2 JP 2018565749 A JP2018565749 A JP 2018565749A JP 2018565749 A JP2018565749 A JP 2018565749A JP 6940166 B2 JP6940166 B2 JP 6940166B2
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- Prior art keywords
- solar cell
- composition
- type solar
- glass frit
- forming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/02—Frit compositions, i.e. in a powdered or comminuted form
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/02—Frit compositions, i.e. in a powdered or comminuted form
- C03C8/10—Frit compositions, i.e. in a powdered or comminuted form containing lead
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
- C03C8/18—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions containing free metals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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Description
本発明の太陽電池電極形成用組成物は、銀粉末、ガラスフリット及び有機ビヒクルを含み、前記ガラスフリットは、Al成分を約50ppm〜約10,000ppmで含む。
本発明の太陽電池電極形成用組成物は、導電性粉末として銀(Ag)粉末を使用する。前記銀粉末は、ナノサイズ又はマイクロサイズの粒径を有する粉末であってもよく、例えば、数十nm〜数百nmサイズの銀粉末、数μm〜数十μmの銀粉末であってもよい。また、前記銀粉末として、2以上の互いに異なるサイズを有する銀粉末を混合して使用してもよい。
ガラスフリットは、太陽電池電極形成用組成物の焼成工程中に反射防止膜をエッチングし、銀粒子を溶融させることによってエミッタ領域に銀結晶粒子を生成させるためのものである。また、ガラスフリットは、銀粉末とウエハーとの間の接着力を向上させ、焼結時の軟化によって焼成温度を低下させるという効果を誘導する。
有機ビヒクルは、太陽電池電極形成用組成物の無機成分との機械的混合を通じて組成物に印刷に適した粘度及びレオロジー特性を付与する。
本発明の太陽電池電極形成用組成物は、上述した構成要素以外に、必要に応じて、金属酸化物粒子をさらに含んでもよい。
本発明の太陽電池電極形成用組成物は、上述した構成要素以外に、流動特性、工程特性及び安定性を向上させるために、必要に応じて通常の添加剤をさらに含んでもよい。前記添加剤は、分散剤、揺変剤(チクソトロピック剤)、可塑剤、粘度安定化剤、消泡剤、顔料、紫外線安定剤、酸化防止剤、カップリング剤などを単独で使用してもよく、これらの2種以上を混合して使用してもよい。これらは、太陽電池電極形成用組成物の全体重量に対して約0.1重量%〜約5重量%で含まれてもよいが、必要に応じて含量を変更してもよい。
本発明の他の観点は、前記のような太陽電池電極形成用組成物から形成された電極及びこれを含む太陽電池に関する。図1は、本発明の一具体例に係る太陽電池の構造を示す。
有機バインダーとしてエチルセルロース(ダウ・ケミカル株式会社、STD4)1.0重量%を溶媒であるテキサノール(Texanol)6.2重量%に60℃で十分に溶解した後、平均粒径が1.0μmである球形の銀粉末(DOWAハイテック株式会社、AG−4−8)89.0重量%、下記の表1に提示されたガラスフリット3.0重量%、添加剤として分散剤であるBYK102(BYK−chemie社)0.2重量%及び揺変剤であるThixatrol ST(Elementis社)0.3重量%、酸化タングステン粒子0.3重量%を投入して均一にミキシングした後、3本ロール混練器で混合・分散させることによって電極ペーストを製造した。
前記において、各ガラスフリットの成分及び含量は次のような方法で測定した。
(1)Rs(series resistance)、Rsh(Shunt resistance)、フィルファクター(FF、%)及び変換効率(Eff.、%):
POCl3でドーピングされたP型基板(Lightway Green New Energy Co.,Ltd.、c−Si p型ウエハー)の前面に前記実施例及び比較例で製造した太陽電池電極形成用ペーストを一定のパターンでスクリーンプリンティングして印刷し、これを赤外線乾燥炉を使用して乾燥させた。その後、ウエハーの後面にアルミニウムペーストを印刷した後、これを同一の方法で乾燥させた。前記過程で形成されたセルをベルト型焼成炉を使用して400℃〜950℃で30秒〜180秒間焼成し、このように製造が完了したセルに対しては、太陽電池効率測定装備(Pasan社、CT−801)を使用して太陽電池の接触抵抗(Rs)(ohm)、分路抵抗(Rsh)(ohm)、フィルファクター(FF、%)、変換効率(Eff.、%)を測定し、その結果を下記の表2に示した。
Claims (10)
- (A)銀粉末;(B)ガラスフリット;及び(C)有機ビヒクル;を含み、
前記ガラスフリットは、酸化されていないアルミニウム(Al)成分を50ppm〜10,000ppmで含むものであるP型太陽電池電極形成用組成物。 - 前記ガラスフリットはテルル(Te)元素を含むものである、請求項1に記載のP型太陽電池電極形成用組成物。
- 前記ガラスフリットは、鉛(Pb)元素及びビスマス(Bi)元素のうち少なくとも一つ以上を含むものである、請求項2に記載のP型太陽電池電極形成用組成物。
- 前記ガラスフリットは、テルル元素及び鉛元素を含み、
前記ガラスフリット内のテルル元素:鉛元素のモル比が1:10〜30:1である、請求項1に記載のP型太陽電池電極形成用組成物。 - 前記ガラスフリットは、テルル元素及びビスマス元素を含み、
前記ガラスフリット内のテルル元素:ビスマス元素のモル比が1:10〜40:1である、請求項1に記載のP型太陽電池電極形成用組成物。 - 前記銀粉末60重量%〜95重量%、前記ガラスフリット0.5重量%〜20重量%及び有機ビヒクル1重量%〜30重量%を含む、請求項1〜5のいずれか1項に記載のP型太陽電池電極形成用組成物。
- 前記P型太陽電池電極形成用組成物は酸化タングステン粒子をさらに含む、請求項1〜6のいずれか1項に記載のP型太陽電池電極形成用組成物。
- 前記P型太陽電池電極形成用組成物は、分散剤、揺変剤、可塑剤、粘度安定化剤、消泡剤、顔料、紫外線安定剤、酸化防止剤及びカップリング剤からなる群から選ばれる添加剤を1種以上さらに含むものである、請求項1〜7のいずれか1項に記載のP型太陽電池電極形成用組成物。
- 請求項1〜8のいずれか1項に記載のP型太陽電池電極形成用組成物で製造されたP型太陽電池電極。
- p型基板、及び前記p型基板の一面に形成されたn型エミッタを含むウエハー;
前記n型エミッタ上に形成された前面電極;及び
前記p型基板の他面に形成された後面電極;を含み、
前記前面電極は、請求項1〜8のいずれか1項に記載のP型太陽電池電極形成用組成物で製造されたことを特徴とするP型太陽電池。
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KR1020160078908A KR101955759B1 (ko) | 2016-06-23 | 2016-06-23 | P형 태양전지 전극 형성용 조성물 및 이를 이용해 제조된 전극 및 p형 태양전지 |
KR10-2016-0078908 | 2016-06-23 | ||
PCT/KR2017/004961 WO2017222181A1 (en) | 2016-06-23 | 2017-05-12 | Composition for p-type solar cell electrode, electrode prepared therefrom and p-type solar cell prepared using the same |
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JP3760361B2 (ja) * | 1997-03-24 | 2006-03-29 | 株式会社村田製作所 | 太陽電池用導電性組成物 |
WO2009052141A1 (en) * | 2007-10-18 | 2009-04-23 | E. I. Du Pont De Nemours And Company | Conductive compositions and processes for use in the manufacture of semiconductor devices |
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JP5768455B2 (ja) * | 2011-04-14 | 2015-08-26 | 日立化成株式会社 | 電極用ペースト組成物及び太陽電池素子 |
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CN102881350B (zh) * | 2012-09-25 | 2015-07-22 | 深圳市首骋新材料科技有限公司 | 太阳能电池正面电极浆料及玻璃粉 |
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US20160284889A1 (en) * | 2013-03-29 | 2016-09-29 | Shoei Chemical Inc. | Conductive paste for solar cell element surface electrodes and method for manufacturing solar cell element |
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