KR20090096704A - 직립 나노와이어 구조를 갖는 led 및 이를 제조하는 방법 - Google Patents
직립 나노와이어 구조를 갖는 led 및 이를 제조하는 방법 Download PDFInfo
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Abstract
Description
Claims (31)
- 기판 및 상기 기판으로부터 돌출된 적어도 하나의 직립 나노와이어를 포함하는 나노구조 LED로서, pn-접합이 광을 생성하는 활성 영역(120)의 형성에 기여하는, 나노구조 LED에 있어서,도파관(116)이 상기 나노와이어(110)에 의해 제공된 방향으로 상기 활성 영역에서 생성된 광의 적어도 일부를 지향시키는 것을 특징으로 하는 나노구조 LED.
- 제 1 항에 있어서,상기 나노와이어(110)의 일부가 상기 도파관(116)을 형성하는 것을 특징으로 하는 나노구조 LED.
- 제 1 항에 있어서,상기 LED는 상기 나노와이어(110)에 에피택셜로 접속되는 볼륨 요소(115)를 포함하며, 상기 볼륨 요소는 상기 활성 영역(120)의 형성을 위해 고도의 도핑을 제공하도록 배열되는 것을 특징으로 하는 나노구조 LED.
- 제 1 항에 있어서,상기 나노와이어(110)의 일부를 둘러싸는 쉘-형 구조가 상기 도파관(116)을 형성하는 것을 특징으로 하는 나노구조 LED.
- 제 1 항에 있어서,상기 나노와이어(110)의 일부를 둘러싸는 쉘-형 구조 및 상기 나노와이어의 일부가 상기 도파관(116)을 형성하는 것을 특징으로 하는 나노구조 LED.
- 제 1 항 내지 3 항 중 어느 한 항에 있어서,상기 도파관(116)은 제 1 유효 굴절률(ηW)을 가지고, 상기 나노와이어의 적어도 일부를 둘러싸는 재료는 제 2 유효 굴절률(ηC)을 가지며, 상기 제 1 굴절률이 상기 제 2 굴절률보다 더 커서(ηW>ηC), 상기 도파관(116)에 도파 특성을 제공하는 것을 특징으로 하는 나노구조 LED.
- 제 6 항에 있어서,상기 도파관(116)은 상기 기판과 규정된 각도를 형성하고, 상기 나노와이어 및 기판 사이의 각도는 상기 제 1 및 제 2 굴절률이 제공되는 경우에, 전체 내부 반사를 성취하는데 충분한 것을 특징으로 하는 나노구조 LED.
- 제 6 항에 있어서,상기 도파관(116)에는 적어도 하나의 클래딩 층(112/113)이 제공되는 것을 특징으로 하는 나노구조 LED.
- 제 8 항에 있어서,하나의 클래딩 층(112/113)은 상기 도파관(116)의 도파 특성을 강화시키는 광학적 클래딩 층(113)인 것을 특징으로 하는 나노구조 LED.
- 제 8 항에 있어서,하나 또는 복수의 클래딩 층(113)이 상기 도파관(116)의 도파 특성을 강화시키는 나노와이어-클래딩 어셈블리의 경계를 향해 등급화된 굴절률을 제공하는 것을 특징으로 하는 나노구조 LED.
- 제 2 항 내지 10 항 중 어느 한 항에 있어서,상기 LED는 어떤 파장 영역에서 광을 생성하도록 디자인되고, 상기 도파관(116)의 직경은 상기 나노와이어에서의 광 전파가 상기 어떤 파장 영역에서의 광에 대한 크기 효과에 의해 방해되지 않게 되는 것을 특징으로 하는 나노구조 LED.
- 제 10 항에 있어서,상기 도파관(116)의 직경은 λ/2ηW보다 더 크고, 여기서 λ는 생성된 광의 파장이며 ηW는 상기 도파관(116)의 굴절률인 것을 특징으로 하는 나노구조 LED.
- 제 12 항에 있어서,상기 나노구조 LED는 가시 영역에서 광을 생성하도록 배열되고, 상기 도파관(116)의 직경은 80 nm보다 더 큰 것을 특징으로 하는 나노구조 LED.
- 제 12 항에 있어서,상기 나노구조 LED는 적외선 또는 근적외선 영역에서 광을 생성하도록 배열되고, 상기 도파관(116)의 직경은 110 nm보다 더 큰 것을 특징으로 하는 나노구조 LED.
- 제 12 항 내지 14 항 중 어느 한 항에 있어서,상기 도파관(116)의 직경은 λ/2ηW보다 더 크고 500 nm보다 더 작은 것을 특징으로 하는 나노구조 LED.
- 제 1 항 내지 15 항 중 어느 한 항에 있어서,상기 활성 영역(120)은 상기 나노와이어(110) 내에 배열되는 것을 특징으로 하는 나노구조 LED.
- 제 16 항에 있어서,상기 활성 영역(120)과 관련된 pn-접합이 상기 볼륨 요소(115)로부터 상기 나노와이어(110)로의 캐리어의 주입에 의해 형성되는 것을 특징으로 하는 나노구조 LED.
- 제 1 항 내지 17 항 중 어느 한 항에 있어서,상기 도파관(116) 또는 상기 도파관(116)/클래딩 어셈블리가 생성된 광의 파장의 광학적 모드와 정합하는 광학적 캐비티를 형성하는 것을 특징으로 하는 나노구조 LED.
- 제 1 항 내지 18 항 중 어느 한 항에 있어서,상기 기판에는 반사 층(108)이 제공되고, 상기 반사 층에는 상기 나노와이어가 신장되는 쓰루 홀(through hole)이 제공되는 것을 특징으로 하는 나노구조 LED.
- 제 1 항 내지 19 항 중 어느 한 항에 있어서,반사 수단은 상기 도파관(116)을 가지고 있고, 상기 기판을 향한 방향으로 트래버싱하는 광을 반사시키도록 배열되는 것을 특징으로 하는 나노구조 LED.
- 제 20 항에 있어서,상기 반사 수단은 다층 구조(111)인 것을 특징으로 하는 나노구조 LED.
- 제 20 항에 있어서,반사 수단은 상기 도파관(116)의 일부 하에서 신장되고 상기 도파관(116)의 단면의 외부를 커버하는 반사 층(108)에 의해 제공되는 것을 특징으로 하는 나노구조 LED.
- 제 22 항에 있어서,상기 도파관(116), 또는 도파관(116) 및 클래딩 어셈블리는 제 1 유효 굴절률(ηW)을 가지고, 상기 반사 층은 제 2 유효 굴절률(ηC)을 가지며, ηW>ηC이고, 나노와이어 및 반사 층 사이의 각도는 전체 내부 반사를 성취하는데 충분한 것을 특징으로 하는 나노구조 LED.
- 제 2 항에 있어서,상기 나노와이어(110) 및 볼륨 요소(115)는 상기 볼륨 요소(115)에서 볼 때 상기 기판을 통한 하향 방향으로 광을 지향시키도록 배열되는 것을 특징으로 하는 나노구조 LED.
- 제 2 항에 있어서,LED 층(1205) 및 평면 LED 표면 상에 직립 구성으로 그리고 LED 층과 에피택셜로 접속되어 배열되는 복수의 나노와이어(1210)를 갖는 평면 LED를 포함하는 것을 특징으로 하는 나노구조 LED.
- 제 2 항에 있어서,상기 볼륨 요소(115)는 상기 나노와이어(110) 및 자신(115) 사이의 접합부에서 분산에 의해 방출된 광을 확산시키도록 배열되는 것을 특징으로 하는 나노구조 LED.
- 제 2 항에 있어서,상기 볼륨 요소(115)는 상기 나노와이어(110) 및 자신(115) 사이의 접합부에서 분산에 의해 방출된 광을 확산시키도록 배열되며, 상기 볼륨 요소의 높이 및 폭은 상기 광을 더 확산시키도록 배열되는 것을 특징으로 하는 나노구조 LED.
- 제 1 항 내지 27 항 중 어느 한 항에 따른 복수의 나노구조 LED를 포함하는 디바이스에 있어서,나노구조 LED(1100)의 그룹은 하나 또는 제한된 세트의 양호하게 규정된 방향으로 광을 방출하도록 배열되고, 적어도 하나의 반사 수단(1160)이 나노구조 LED(1100)의 그룹과 관련된 방향 중 하나로부터 광을 반사시키도록 배열되는, 디바이스.
- 나노구조 LED를 제조하는 방법에 있어서,와이어 성장을 촉진하는 제 1 성장 모드에서의 나노와이어의 제 1의 성장 및 반경방향 성장을 촉진하는 제 2 성장 모드에서의 볼륨 요소의 제 2의 선택적 성장을 포함하는 나노구조 LED 제조 방법.
- 제 29 항에 있어서,- 리소그래피에 의해 기판(1305) 상에 국소 촉매/촉매들을 규정하는 단계(1);- 국소 촉매(1331)로부터 나노와이어(1310)를 성장시키는 단계로서, 성장 파라미터가 촉매 와이어 성장을 위해 조정되는, 성장 단계(2);- 나노와이어 주위에 얇은 동심 층(1312)을 반경방향으로 성장시키는 단계(3);- 마스크 재료(1332)를 증착시키는 단계(4);- 나노와이어의 상부를 개방하기 위하여 마스크(1332)를 백 에칭하는 단계(5);- 볼륨 요소(1315)를 선택적으로 성장시키는 단계로서, 성장 파라미터가 반경방향 성장을 제공하기 위해 조정되는, 성장 단계(6)를 포함하는 것을 특징으로 하는 나노구조 LED 제조 방법.
- 제 30 항에 있어서,우선 얇은 나노와이어를 성장시키고(단계 2), 나노와이어의 하부를 커버하는 선택적 성장 마스크 또는 반사 층을 증착하고, 나노와이어 두께를 증가시키기 위하 여 클래딩 층 또는 나노와이어를 반경방향으로 성장시킴으로써 나노와이어 상에 스템(113)을 형성하는 단계를 더 포함하는 것을 특징으로 하는 나노구조 LED 제조 방법.
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| WO2015095049A1 (en) * | 2013-12-17 | 2015-06-25 | Glo Ab | Iii-nitride nanowire led with strain modified surface active region and method of making thereof |
| US9281442B2 (en) | 2013-12-17 | 2016-03-08 | Glo Ab | III-nitride nanowire LED with strain modified surface active region and method of making thereof |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN102255018B (zh) | 2013-06-19 |
| EP2095425A4 (en) | 2012-10-10 |
| EP2126986A4 (en) | 2012-10-10 |
| CN101669219B (zh) | 2011-10-05 |
| EP2126986B1 (en) | 2019-09-18 |
| EP2095425A1 (en) | 2009-09-02 |
| JP2010514207A (ja) | 2010-04-30 |
| WO2008079076A1 (en) | 2008-07-03 |
| CN102255018A (zh) | 2011-11-23 |
| EP2095425B1 (en) | 2019-04-17 |
| CN101681918B (zh) | 2012-08-29 |
| HK1142718A1 (en) | 2010-12-10 |
| JP5453105B2 (ja) | 2014-03-26 |
| US10263149B2 (en) | 2019-04-16 |
| WO2008079079A1 (en) | 2008-07-03 |
| US20150333225A1 (en) | 2015-11-19 |
| EP2126986A1 (en) | 2009-12-02 |
| JP2010514206A (ja) | 2010-04-30 |
| CN101681918A (zh) | 2010-03-24 |
| CN101669219A (zh) | 2010-03-10 |
| HK1142170A1 (en) | 2010-11-26 |
| JP5145353B2 (ja) | 2013-02-13 |
| US20100283064A1 (en) | 2010-11-11 |
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