JP6815533B2 - 穿孔perc両面太陽電池およびそのモジュール、システムと製造方法 - Google Patents
穿孔perc両面太陽電池およびそのモジュール、システムと製造方法 Download PDFInfo
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- JP6815533B2 JP6815533B2 JP2019548048A JP2019548048A JP6815533B2 JP 6815533 B2 JP6815533 B2 JP 6815533B2 JP 2019548048 A JP2019548048 A JP 2019548048A JP 2019548048 A JP2019548048 A JP 2019548048A JP 6815533 B2 JP6815533 B2 JP 6815533B2
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Description
本発明の解決しようとする課題は、プロセスが簡単で、コストが抑えられ、広く普及されやすい、光電変換効率を大幅に向上させる穿孔PERC両面太陽電池の製造方法を提供することである。
本発明の解決しようとする課題は、構成が簡単で、コストが抑えられ、広く普及されやすい、光電変換効率を大幅に向上させる穿孔PERC両面太陽電池モジュールを提供することである。
本発明の解決しようとする技術課題は、構成が簡単で、コストが抑えられ、広く普及されやすい、光電変換効率を大幅に向上させるP型PERC両面太陽エネルギーシステムを提供することである。
上記PERC両面太陽電池には、電池の表面と裏面を貫通する光透過領域が設置されており、
上記光透過領域は、裏面銀バスバー及び表面銀バスバー以外の領域に設置され、
上記光透過領域は、裏面アルミニウムフィンガー、または裏面アルミニウムフィンガー以外の領域に設置され、
上記光透過領域は、表面銀フィンガー、または表面銀フィンガー以外の領域に設置され、上記光透過領域が表面銀フィンガーに設置される場合、上記表面銀フィンガーは、第1の表面銀フィンガーと第2の表面銀フィンガーを備え、上記第2の表面銀フィンガーは、光透過領域を迂回し、且つ第1の表面銀フィンガーに接触するように形成される。
P型シリコンであるシリコンウェハにレーザー穿孔を行い、光透過領域を形成するステップ(1)と、
シリコンウェハの表面および裏面にテクスチャ構造を形成するステップ(2)と、
シリコンウェハの表面に拡散処理を施して、N型エミッタを形成するステップ(3)と、
拡散処理時に形成されたリンケイ酸ガラスを除去するステップ(4)と、
シリコンウェハの表面及び裏面にパッシベーション層を形成するステップ(5)と、
シリコンウェハの裏面にレーザーグルービングするステップ(6)と、
上記シリコンウェハの裏面であって、光透過領域以外の領域に、裏面銀バスバーを印刷するステップ(7)と、
上記シリコンウェハの裏面であって、光透過領域または光透過領域以外の領域に、裏面アルミニウムフィンガーを印刷するステップ(9)と、
上記シリコンウェハの表面に表面銀バスバーおよび表面銀フィンガーを印刷し、且つ上記表面銀バスバーが光透過領域以外の領域に印刷されるステップ(10)であって、
上記表面銀フィンガーは、光透過領域、または光透過領域以外の領域に印刷され、上記光透過領域が表面銀フィンガーに設置される場合、上記表面銀フィンガーは、第1の表面銀フィンガーと第2の表面銀フィンガーを備え、上記第2の表面銀フィンガーは、光透過領域を迂回し、且つ第1の表面銀フィンガーに接触するように形成されるステップ(10)と、
シリコンウェハを高温で焼結して、裏面銀電極及び表面銀電極を形成するステップ(11)と、
シリコンウェハに対して、LIDを抑制するためのアニーリング処理を施すステップ(12)と、
シリコンウェハの周辺および光透過領域の周辺に対して、レーザー分離処理を施すステップ(13)と、を備える。
本発明において、PERC両面太陽電池には、電池の表面と裏面を貫通する光透過領域が設置されており、光透過領域と裏面銀バスバー、表面銀バスバー、裏面アルミニウムフィンガー、表面銀フィンガーとは、特別な構造設計を採用している。具体的に、上記光透過領域は、裏面銀バスバー及び表面銀バスバー以外の領域に設置され、且つ裏面アルミニウムフィンガー、または裏面アルミニウムフィンガー以外の領域に設置され、且つ表面銀フィンガー、または表面銀フィンガー以外の領域に設置される。上記光透過領域が表面銀フィンガーに設置される場合、上記表面銀フィンガーは、第1の表面銀フィンガーと第2の表面銀フィンガーを備え、上記第2の表面銀フィンガーは、光透過領域を迂回し、且つ第1の表面銀フィンガーに接触するように形成される。本発明によれば、表面から入射した太陽光は、電池の光透過領域を介して電池の裏面に照射され、さらに、両面太陽電池モジュールの裏面の反射媒体により、太陽光を電池の裏面に反射し、裏面反射される太陽光を増加し、電池裏面の光電変換効率を大幅に向上させ、電池裏面の光電変換効率を1%〜10%(相対値)増加させることができる。
図5は太陽電池の表面の構造の別の一実施例を示し、図5に示すように、上記光透過領域10は表面銀フィンガー7以外の領域に設置され、上記光透過領域10のサイズは、表面銀フィンガー7の幅よりも大きくてもよいし、表面銀フィンガー7の幅に等しくてもよい。
P型シリコンであるシリコンウェハにレーザー穿孔を行い、光透過領域を形成するステップ(1)と、
シリコンウェハの表面および裏面にテクスチャ構造を形成するステップ(2)と、
シリコンウェハの表面に拡散処理を施して、N型エミッタを形成するステップ(3)と、
拡散処理時に形成されたリンケイ酸ガラスを除去するステップ(4)と、
シリコンウェハの表面及び裏面にパッシベーション層を形成するステップ(5)であって、
シリコンウェハの裏面に酸化アルミニウム膜を堆積すること(A)と、シリコンウェハの裏面に窒化ケイ素膜を堆積すること(B)と、シリコンウェハの表面に窒化ケイ素膜を堆積すること(C)と、を備えるステップ(5)(なお、CとA、Bとの順序を入れ替えてもよく、CはA、Bより前であってもよい)と、
シリコンウェハの裏面にレーザーグルービングするステップ(6)と、
上記シリコンウェハの裏面であって、光透過領域以外の領域に、裏面銀バスバーを印刷するステップ(7)と、
上記シリコンウェハの裏面であって、光透過領域、または光透過領域以外の領域に、裏面アルミニウムフィンガーを印刷するステップ(9)と、
上記シリコンウェハの表面に表面銀バスバーおよび表面銀フィンガーを印刷し、且つ上記表面銀バスバーが光透過領域以外の領域に印刷されるステップ(10)であって、
上記表面銀フィンガーは、光透過領域、または光透過領域以外の領域に印刷され、上記光透過領域が表面銀フィンガーに設置される場合、上記表面銀フィンガーは、第1の表面銀フィンガーと第2の表面銀フィンガーを備え、上記第2の表面銀フィンガーは、光透過領域を迂回し、且つ第1の表面銀フィンガーに接触するように形成されるステップ(10)と、
シリコンウェハを高温で焼結して、裏面銀電極及び表面銀電極を形成するステップ(11)と、
シリコンウェハに対して、LID(Light Induces Degradation)を抑制するためのアニーリング処理を施すステップ(12)と、
シリコンウェハの周辺および光透過領域の周辺に対して、レーザー分離(Laser Isolationation)処理を施すステップ(13)と、を備える。
なお、上記実施例は、本発明を実施するための形態を説明するのみに用いられ、本発明の範囲を制限するわけがない。好ましい実施例を参照しながら本発明を詳細に説明したが、当業者であれば、本発明の要旨および範囲を逸脱しない範囲で様々な変更及び均等な置換が可能であることを理解すべきである。
2 裏面アルミニウムフィンガー
3 裏面パッシベーション層
31 酸化アルミニウム層
32 窒化ケイ素層
4 P型シリコン
5 N型エミッタ
6 表面パッシベーション層
7 表面銀フィンガー
71 第1の表面銀フィンガー
72 第2の表面銀フィンガー
8 表面銀バスバー
9 レーザーグルービング領域
10 光透過領域
Claims (10)
- 裏面銀バスバーと、裏面アルミニウムフィンガーと、裏面パッシベーション層と、P型シリコンと、N型エミッタと、表面パッシベーション層と、表面銀フィンガーと、表面銀バスバーと、を備え、レーザーグルービングによって前記裏面パッシベーション層にレーザーグルービング領域が形成され、前記裏面アルミニウムフィンガーは、前記レーザーグルービング領域を介して前記P型シリコンに接続されている穿孔PERC両面太陽電池であって、
前記穿孔PERC両面太陽電池には、電池の表面と裏面を貫通する光透過領域が設置されており、
前記光透過領域は、前記裏面銀バスバー及び前記表面銀バスバー以外の領域に設置され、
前記光透過領域は、前記裏面アルミニウムフィンガー、または前記裏面アルミニウムフィンガー以外の領域に設置され、
前記光透過領域は、前記表面銀フィンガー、または前記表面銀フィンガー以外の領域に設置され、前記光透過領域が前記表面銀フィンガーに設置される場合、前記表面銀フィンガーは、第1の表面銀フィンガーと第2の表面銀フィンガーを備え、前記第2の表面銀フィンガーは、前記光透過領域を迂回し、且つ前記第1の表面銀フィンガーに接触するように形成される、ことを特徴とする穿孔PERC両面太陽電池。 - 前記光透過領域のサイズは、前記裏面アルミニウムフィンガーの幅よりも小さく、且つ前記表面銀フィンガーの幅よりも大きい、ことを特徴とする請求項1に記載の穿孔PERC両面太陽電池。
- 前記第1の表面銀フィンガーは線状であり、前記第2の表面銀フィンガーはアーチ状である、ことを特徴とする請求項1に記載の穿孔PERC両面太陽電池。
- 前記光透過領域は、円形の穴、方形の穴、五角形の穴、または六角形の穴である、ことを特徴とする請求項1に記載の穿孔PERC両面太陽電池。
- 前記光透過領域の数は2〜100個である、ことを特徴とする請求項1に記載の穿孔PERC両面太陽電池。
- 前記光透過領域のサイズは100μm〜5cmである、ことを特徴とする請求項1に記載の穿孔PERC両面太陽電池。
- 前記裏面アルミニウムフィンガーの幅は150μm〜5.5cmであり、前記表面銀フィンガーの幅は30〜80μmである、ことを特徴とする請求項6に記載の穿孔PERC両面太陽電池。
- 請求項1乃至7のいずれか一項に記載の穿孔PERC両面太陽電池の製造方法であって、
P型シリコンであるシリコンウェハにレーザー穿孔を行い、光透過領域を形成するステップ(1)と、
前記シリコンウェハの表面および裏面にテクスチャ構造を形成するステップ(2)と、
前記シリコンウェハの表面に拡散処理を施して、N型エミッタを形成するステップ(3)と、
拡散処理時に形成されたリンケイ酸ガラスを除去するステップ(4)と、
前記シリコンウェハの表面及び裏面にパッシベーション層を形成するステップ(5)と、
前記シリコンウェハの裏面にレーザーグルービングするステップ(6)と、
前記シリコンウェハの裏面であって、前記光透過領域以外の領域に、裏面銀バスバーを印刷するステップ(7)と、
前記シリコンウェハの裏面であって、前記光透過領域または前記光透過領域以外の領域に、裏面アルミニウムフィンガーを印刷するステップ(9)と、
前記シリコンウェハの表面に表面銀バスバーおよび表面銀フィンガーを印刷し、且つ前記表面銀バスバーが前記光透過領域以外の領域に印刷されるステップ(10)であって、
前記表面銀フィンガーは、前記光透過領域、または前記光透過領域以外の領域に印刷され、前記光透過領域が前記表面銀フィンガーに設置される場合、前記表面銀フィンガーは、第1の表面銀フィンガーと第2の表面銀フィンガーを備え、前記第2の表面銀フィンガーは、光透過領域を迂回し、且つ前記第1の表面銀フィンガーに接触するように形成されるステップ(10)と、
前記シリコンウェハを高温で焼結して、裏面銀電極及び表面銀電極を形成するステップ(11)と、
前記シリコンウェハに対して、LIDを抑制するためのアニーリング処理を施すステップ(12)と、
前記シリコンウェハの周辺および前記光透過領域の周辺に対して、レーザー分離処理を施すステップ(13)と、を備える、ことを特徴とする穿孔PERC両面太陽電池の製造方法。 - PERC太陽電池および封止材を備えるPERC太陽電池モジュールであって、
前記PERC太陽電池は、請求項1乃至請求項7のいずれか一項に記載の穿孔PERC両面太陽電池である、ことを特徴とするPERC太陽電池モジュール。 - PERC太陽電池を備えるPERC太陽エネルギーシステムであって、
前記PERC太陽電池は、請求項1乃至請求項7のいずれか一項に記載の穿孔PERC両面太陽電池である、ことを特徴とするPERC太陽エネルギーシステム。
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- 2017-06-07 KR KR1020197029111A patent/KR102240902B1/ko active IP Right Grant
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JP2020509605A (ja) | 2020-03-26 |
CN106847943B (zh) | 2018-10-09 |
US20200381572A1 (en) | 2020-12-03 |
EP3588582B1 (en) | 2022-05-11 |
CN106847943A (zh) | 2017-06-13 |
KR102240902B1 (ko) | 2021-04-16 |
KR20200005534A (ko) | 2020-01-15 |
EP3588582A1 (en) | 2020-01-01 |
EP3588582A4 (en) | 2020-12-23 |
WO2018157495A1 (zh) | 2018-09-07 |
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