KR101045859B1 - 태양 전지 및 그 제조 방법 - Google Patents
태양 전지 및 그 제조 방법 Download PDFInfo
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- KR101045859B1 KR101045859B1 KR1020090061232A KR20090061232A KR101045859B1 KR 101045859 B1 KR101045859 B1 KR 101045859B1 KR 1020090061232 A KR1020090061232 A KR 1020090061232A KR 20090061232 A KR20090061232 A KR 20090061232A KR 101045859 B1 KR101045859 B1 KR 101045859B1
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- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 3
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- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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Abstract
Description
Claims (19)
- 제1 도전성 타입의 제1 불순물을 함유하고 있고 복수의 돌출부를 구비한 텍스처링 표면을 갖는 기판,상기 기판의 텍스처링 표면에 위치하고, 상기 제1 도전성 타입과 반대인 제2 도전성 타입의 제2 불순물을 함유하고 있는 에미터부,복수의 제1 금속 입자를 포함하고, 상기 에미터부와 전기적으로 연결되어 있는 제1 전극, 그리고상기 기판과 전기적으로 연결되어 있는 제2 전극을 포함하고,상기 복수의 제1 금속 입자의 지름은 상기 인접한 두 돌출부간의 거리보다 큰태양 전지.
- 제1항에서,상기 복수의 제1 금속 입자는 상기 복수의 돌출부의 꼭대기 근처에 형성되는 상기 에미터부와만 전기적으로 연결되어 있는 태양 전지.
- 제1항에서,상기 인접한 두 돌출부간의 거리는 상기 인접한 두 돌출부의 꼭지점간의 거 리인 태양 전지.
- 제1항에서,상기 각 돌출부에 함유되는 상기 제2 불순물의 농도는 위치에 따라 다른 태양 전지.
- 제4항에서,상기 각 돌출부의 꼭대기 부분에 함유되는 상기 제2 불순물 농도는 상기 각 돌출부의 나머지 부분에 함유되는 상기 제2 불순물 농도보다 높은 태양 전지.
- 제1항에서,상기 각 돌출부에 형성되는 상기 에미터부의 두께는 위치에 따라 다른 태양 전지.
- 제6항에서,상기 각 돌출부의 꼭대기 부분에 형성되는 상기 에미터부의 두께는 상기 각 돌출부의 나머지 부분에 형성되는 상기 에미터부의 두께보다 두꺼운 태양 전지.
- 제6항에서,상기 에미터부의 두께는 250㎚ 내지 350㎚인 태양 전지.
- 제8항에서,상기 에미터부의 면저항값은 80Ω/sq. 내지 150Ω/sq.인 태양 전지.
- 제1항에서,상기 제1 금속 입자는 상기 제1 전극과 상기 에미터부와의 접경 부근에 위치하는 태양 전지.
- 제10항에서,상기 제1 전극은 상기 제1 금속 입자의 지름보다 큰 지름을 갖는 복수의 제2 금속 입자를 더 포함하는 태양 전지.
- 제11항에서,상기 복수의 제2 금속 입자 각각은 2㎛ 내지 5㎛인 태양 전지.
- 제11항에서,상기 제1 금속 입자와 상기 제2 금속 입자는 은(Ag) 입자인 태양 전지.
- 제1항 내지 제13항 중 어느 한 항에서,상기 제1 금속 입자의 지름은 300㎚ 내지 700㎚인 태양 전지.
- 제1항 내지 제13항 중 어느 한 항에서,상기 인접한 두 돌출부간의 거리는 200㎚ 내지 500㎚인 태양 전지.
- 제1 도전성 타입의 제1 불순물을 함유하는 기판의 면에 복수의 돌출부를 구비한 텍스처링 표면을 형성하는 단계,상기 기판에 제2 도전성 타입의 제2 불순물을 주입하여 상기 기판의 전면과 후면에 에미터부를 형성하는 단계,복수의 제1 금속 입자를 함유하는 제1 페이스트를 상기 기판의 전면에 형성된 상기 에미터부 위에 도포하여 제1 전극 패턴을 형성하는 단계,복수의 제2 금속 입자를 함유하는 제2 페이스트를 상기 기판의 후면에 형성된 상기 에미터부 위에 도포하여 제2 전극 패턴을 형성하는 단계, 그리고상기 제1 및 제2 전극 패턴을 구비한 상기 기판을 열처리하여 상기 에미터부와 전기적으로 연결되는 제1 전극과 상기 기판과 전기적으로 연결되는 제2 전극을 형성하는 단계를 포함하고,상기 복수의 제1 금속 입자 각각은 2㎛ 내지 5㎛의 지름을 갖는태양 전지의 제조 방법.
- 제16항에서,상기 텍스처링 표면 형성 단계는 건식 식각법을 이용하여 상기 기판의 한 면에 텍스처링 표면을 형성하는 태양 전지의 제조 방법.
- 제16항 또는 제17항에서,인접한 두 돌출부간의 거리는 200㎚ 내지 500㎚인 태양 전지의 제조 방법.
- 제16항에서,상기 에미터부 형성 단계는 810℃ 내지 840℃의 온도에서 10분 내지 20분 동안 상기 제2 불순물을 상기 기판에 확산시켜 상기 에미터부를 형성하고, 상기 에미터부는 250㎚ 내지 350㎚ 두께를 갖는 태양 전지의 제조 방법.
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