KR102009927B1 - 나노결정 코어 및 나노결정 쉘을 지닌 반도체 구조물 - Google Patents
나노결정 코어 및 나노결정 쉘을 지닌 반도체 구조물 Download PDFInfo
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- KR102009927B1 KR102009927B1 KR1020147015625A KR20147015625A KR102009927B1 KR 102009927 B1 KR102009927 B1 KR 102009927B1 KR 1020147015625 A KR1020147015625 A KR 1020147015625A KR 20147015625 A KR20147015625 A KR 20147015625A KR 102009927 B1 KR102009927 B1 KR 102009927B1
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Abstract
Description
도 2는 본 발명의 구체예에 따른, 양자점의 횡단면의 개략도를 도시한다.
도 3은 본 발명의 구체예에 따른, 절대 광발광 양자 수율을 측정하기 위한 적분구의 개략도를 도시한다.
도 4는 본 발명의 구체예에 따른, 광발광 양자 수율의 측정에 사용된 샘플 및 기준 발광 스펙트럼에 대한 나노미터 파장에 따른 광양자 수의 플롯이다.
도 5는 본 발명의 구체예에 따른, 적색 CdSe/CdS 코어/쉘 양자점에 대한 UV-Vis 흡수 스펙트럼 및 광발광 방출 스펙트럼을 포함하는 플롯이다.
도 6은 본 발명의 구체예에 따른, 녹색 CdSe/CdS 코어/쉘 양자점에 대한 UV-Vis 흡수 스펙트럼 및 광발광 방출 스펙트럼을 포함하는 플롯이다.
도 7은 본 발명의 구체예에 따른, 반도체 구조물을 코팅하기 위한 역미쉘 접근법에서의 작업을 도시한다.
도 8은 본 발명의 구체예에 따른, 완전한 실리카 캡슐화를 갖는 실리카 코팅된 CdSe/CdS 코어/쉘 양자점의 투과 전자 현미경 (TEM) 이미지이다.
도 9A-C는 본 발명의 구체예에 따른, 양자점 통합을 위한 가능한 복합 조성물의 개략적인 대표를 도시한다.
도 10은 본 발명의 구체예에 따른 코어/쉘 CdSe/CdS 양자점 샘플의 투과 전자 현미경 (TEM) 이미지이다.
도 11은 본 발명의 구체예에 따른, PLQY가 96%인 CdSe/CdS 코어/쉘 양자점에 대한 UV-Vis 흡수 스펙트럼 및 광발광 방출 스펙트럼을 포함하는 플롯이다.
도 12는 본 발명의 구체예에 따른, PLQY가 96%인 CdSe/CdS 양자점 샘플의 투과 전자 현미경 (TEM) 이미지이다.
Claims (67)
- 반도체 구조물로서,
제 1 반도체 물질을 포함하며 1.0 초과 내지 2.0 미만의 가로세로비를 지니는 이방성 나노결정 코어; 및
이방성 나노결정 코어를 완전히 둘러싸는 상이한 제 2 반도체 물질을 포함하는 나노결정 쉘을 포함하고,
나노결정 쉘은 센터를 지니고, 나노결정 쉘은 제1 축을 따라 제1 방향으로 연장되고 이방성 나노결정 코어는 제1 축을 따라 제1 방향으로 나노결정 쉘에 대해 센터를 벗어나 배치되고, 나노결정 쉘은 제1 축에 대해 직각인 제2 축을 따라 제2 방향으로 연장되고 이방성 나노결정 코어는 또한 제2 축을 따라 제2 방향으로 나노결정 쉘에 대해 센터를 벗어나 배치되고, 나노결정 쉘은 제2 방향으로보다 제1 방향으로 더 긴, 반도체 구조물. - 삭제
- 삭제
- 제 1항에 있어서, 이방성 나노결정 코어의 가로세로비가 1.01 내지 1.2의 범위 내에 있는, 반도체 구조물.
- 삭제
- 삭제
- 삭제
- 삭제
- 제 1항에 있어서, 나노결정 쉘이 이방성 나노결정 쉘과 이방성 나노결정 코어 사이의 계면에서 이방성 나노결정 코어를 둘러싸는 이방성 나노결정 쉘이고, 이방성 나노결정 쉘이 그러한 계면에서 트랩 상태를 패시베이션시키거나 감소시키는, 반도체 구조물.
- 제 1항에 있어서, 나노결정 쉘이 이방성 나노결정 쉘과 이방성 나노결정 코어 사이의 계면에서 이방성 나노결정 코어를 둘러싸는 이방성 나노결정 쉘이고, 이방성 나노결정 쉘이 그러한 계면에서 트랩 상태를 비활성화시키는(deactivate), 반도체 구조물.
- 제 1항에 있어서, 나노결정 쉘이 로드형 나노결정 쉘인, 반도체 구조물.
- 제 1항에 있어서, 제 1 및 제 2 반도체 물질이 각각 II-VI족 물질, III-V족 물질, IV-VI족 물질, I-III-VI족 물질, 및 II-IV-VI족 물질로 이루어진 군으로부터 선택되는, 반도체 구조물.
- 제 12항에 있어서, 제 1 및 제 2 반도체 물질이 둘 모두 II-VI족 물질이고, 제 1 반도체 물질이 카드뮴 셀레나이드(CdSe)이고, 제 2 반도체 물질이 카드뮴 설파이드 (CdS), 징크 설파이드 (ZnS), 및 징크 셀레나이드 (ZnSe)로 이루어진 군으로부터 선택되는, 반도체 구조물.
- 제 1항에 있어서, 부분적으로 또는 전체적으로 나노결정 쉘을 둘러싸는 나노결정 외각 쉘을 추가로 포함하고, 상기 나노결정 외각 쉘은 제 1 및 제 2 반도체 물질과 상이한 제 3 반도체 물질을 포함하는, 반도체 구조물.
- 제 14항에 있어서, 제 1 반도체 물질이 카드뮴 셀레나이드(CdSe)이고, 제 2 반도체 물질이 카드뮴 설파이드 (CdS)이고, 제 3 반도체 물질이 징크 설파이드 (ZnS)인, 반도체 구조물.
- 제 14항에 있어서, 나노결정 외각 쉘이 나노결정 쉘을 완전히 둘러싸는, 반도체 구조물.
- 제 1항에 있어서, 반도체 구조물의 가로세로비가 1.5 내지 10 범위인, 반도체 구조물.
- 제 1항에 있어서, 나노결정 쉘이 장축 및 단축을 지니고, 장축의 길이가 5 내지 40 나노미터 범위이고, 단축의 길이가 나노결정 쉘의 단축과 평행한 이방성 나노결정 코어의 직경보다 1 내지 5 나노미터 범위로 큰, 반도체 구조물.
- 제 18항에 있어서, 이방성 나노결정 코어의 직경이 2 내지 5 나노미터 범위인, 반도체 구조물.
- 제 1항에 있어서, 이방성 나노결정 코어의 직경이 2 내지 5 나노미터 범위이고, 나노결정 쉘의 단축을 따르는 이방성 나노결정 코어 상의 나노결정 쉘의 두께가 제 2 반도체 물질의 1 내지 5 나노미터 범위인, 반도체 구조물.
- 제 1항에 있어서, 제 1 및 제 2 반도체 물질이 단결정인, 반도체 구조물.
- 제 1항에 있어서, 이방성 나노결정 코어 및 나노결정 쉘이 양자점(quantum dot)을 형성하는, 반도체 구조물.
- 제 22항에 있어서, 양자점이 90% 이상의 광발광 양자 수율(PLQY)을 지니는, 반도체 구조물.
- 제 22항에 있어서, 양자점으로부터의 발광이 나노결정 코어로부터 나오는, 반도체 구조물.
- 제 24항에 있어서, 이방성 나노결정 코어로부터의 발광이 양자점으로부터의 총 발광의 75% 이상인, 반도체 구조물.
- 제 22항에 있어서, 양자점의 흡광 스펙트럼 및 발광 스펙트럼이 비-중첩인, 반도체 구조물.
- 제 22항에 있어서, 양자점에 대한 엑시톤(exciton) 피크에서의 흡광도 대비(versus) 400 나노미터에서의 흡광도에 대한 양자점의 흡광도 비율이 5 내지 35의 범위인, 반도체 구조물.
- 제 22항에 있어서, 양자점이 하향-변환(down-converting) 양자점인, 반도체 구조물.
- 제 22항에 있어서, 양자점이 상향-전이(up-shifting) 양자점인, 반도체 구조물.
- 양자점으로서,
제 1 반도체 물질을 포함하는 나노결정 코어; 및
나노결정 코어를 완전히 둘러싸는 상이한 제 2 반도체 물질을 포함하는 나노결정 쉘을 포함하며,
나노결정 쉘은 센터를 지니고, 나노결정 쉘은 제1 축을 따라 제1 방향으로 연장되고 이방성 나노결정 코어는 제1 축을 따라 제1 방향으로 나노결정 쉘에 대해 센터를 벗어나 배치되고, 나노결정 쉘은 제1 축에 대해 직각인 제2 축을 따라 제2 방향으로 연장되고 이방성 나노결정 코어는 또한 제2 축을 따라 제2 방향으로 나노결정 쉘에 대해 센터를 벗어나 배치되고, 나노결정 쉘은 제2 방향으로보다 제1 방향으로 더 길고, 양자점은 90% 이상의 광발광 양자 수율(PLQY)을 지니는, 양자점. - 제 30항에 있어서, 양자점으로부터의 발광이 나노결정 코어로부터 나오는, 양자점.
- 제 31항에 있어서, 나노결정 코어로부터의 발광이 양자점으로부터의 총 발광의 75% 이상인, 양자점.
- 제 30항에 있어서, 양자점의 흡광 스펙트럼 및 발광 스펙트럼이 비-중첩인, 양자점.
- 제 30항에 있어서, 양자점에 대한 엑시톤 피크에서의 흡광도 대비 400 나노미터에서의 흡광도에 대한 양자점의 흡광도 비율이 5 내지 35의 범위인, 양자점.
- 제 30항에 있어서, 양자점이 하향-변환 양자점인, 양자점.
- 제 30항에 있어서, 나노결정 코어가 1.0 초과 내지 2.0 미만의 가로세로비를 지닌 이방성 나노결정 코어인, 양자점.
- 제 36항에 있어서, 이방성 나노결정 코어의 가로세로비가 1.01 내지 1.2 범위인, 양자점.
- 제 30항에 있어서, 나노결정 쉘이 로드형 나노결정 쉘인 양자점.
- 삭제
- 제 30항에 있어서, 나노결정 코어가 파셋화되는(faceted), 양자점.
- 삭제
- 발광 다이오드; 및
복수의 제 30항에 따른 양자점을 포함하는, 조명 장치. - 제 42항에 있어서, 각각의 양자점으로부터의 발광이 나노결정 코어로부터 나오는, 조명 장치.
- 제 43항에 있어서, 나노결정 코어로부터의 발광이 양자점으로부터의 총 발광의 75% 이상인, 조명 장치.
- 제 42항에 있어서, 각각의 양자점의 흡광 스펙트럼 및 발광 스펙트럼이 비-중첩인, 조명 장치.
- 제 42항에 있어서, 양자점에 대한 엑시톤 피크에서의 흡광도 대비 400 나노미터에서의 흡광도에 대한 각각의 양자점의 흡광도 비율이 5 내지 35의 범위인, 조명 장치.
- 제 42항에 있어서, 각각의 양자점이 하향-변환 양자점인, 조명 장치.
- 반도체 구조물을 제조하는 방법으로서,
제 1 반도체 물질로부터 1.0 초과 내지 2.0 미만의 가로세로비를 지니는 이방성 나노결정 코어를 형성시키고,
이방성 나노결정 코어를 완전히 둘러싸기 위해 상이한 제 2 반도체 물질로부터 나노결정 쉘을 형성시키는 것을 포함하고,
나노결정 쉘은 제1 축을 따라 제1 방향으로 연장되고 이방성 나노결정 코어는 제1 축을 따라 제1 방향으로 나노결정 쉘에 대해 센터를 벗어나 배치되고, 나노결정 쉘은 제1 축에 대해 직각인 제2 축을 따라 제2 방향으로 연장되고 이방성 나노결정 코어는 또한 제2 축을 따라 제2 방향으로 나노결정 쉘에 대해 센터를 벗어나 배치되고, 나노결정 쉘은 제2 방향으로보다 제1 방향으로 더 긴, 방법. - 제 48항에 있어서,
나노결정 쉘을 형성시키기 전에, 이방성 나노결정 코어를 계면활성제를 지닌 용액 중에서 안정화시키는 것을 추가로 포함하는 방법. - 제 49항에 있어서, 계면활성제가 옥타데실포스폰산(ODPA)인 방법.
- 제 49항에 있어서, 계면활성제가 이방성 나노결정 코어에 대한 리간드로서 작용하고,
나노결정 쉘을 형성시키기 전에, 계면활성제 리간드를 제 2 리간드로 대체시키는 것을 추가로 포함하며, 상기 제 2 리간드는 상기 계면활성제 리간드보다 불안정한, 방법. - 제 51항에 있어서, 제 2 리간드가 일차 아민 및 이차 아민으로 이루어진 군으로부터 선택되는 방법.
- 제 48항에 있어서, 나노결정 쉘을 형성시키는 것이 계면활성제의 혼합물의 존재 하에 제 2 반도체 물질을 형성시키는 것을 포함하는 방법.
- 제 53항에 있어서, 계면활성제의 혼합물이 옥타데실포스폰산(ODPA)과 헥실포스폰산(HPA)의 혼합물을 포함하는 방법.
- 제 54항에 있어서, 나노결정 쉘을 형성시키는 것이 HPA에 대한 ODPA의 비를 조정함으로써 나노결정 쉘의 가로세로비를 조정하는 것을 포함하는 방법.
- 제 54항에 있어서, 계면활성제의 혼합물의 존재 하에 제 2 반도체 물질을 형성시키는 것이 트리옥틸포스핀 옥사이드(TOPO) 및 트리옥틸포스핀(TOP)으로 이루어진 군으로부터 선택된 용매를 사용하는 것을 포함하는 방법.
- 제 48항에 있어서, 이방성 나노결정 코어를 형성시키는 것이 350 내지 380℃ 범위의 온도에서 형성시키는 것을 포함하는 방법.
- 제 48항에 있어서, 이방성 나노결정 코어를 형성시키는 것이 300 내지 400℃ 범위의 온도에서 계면활성제의 존재 하에 카드뮴 옥사이드(CdO) 및 셀레늄(Se)으로부터 카드뮴 셀레나이드(CdSe) 나노결정을 형성시키고, 종료 전에 반응을 정지시키는 것을 포함하는 방법.
- 제 58항에 있어서, 나노결정 쉘을 형성시키는 것이 120 내지 380℃ 범위의 온도에서 카드뮴 옥사이드(CdO) 및 황(S)로부터, CdSe 나노결정 상에, 카드뮴 설파이드(CdS) 나노결정 층을 형성시키고, 종료 전에 반응을 정지시키는 것을 포함하는 방법.
- 제 48항에 있어서, 나노결정 쉘을 형성시키는 것이 로드형 나노결정 쉘을 형성시키는 것을 포함하는 방법.
- 삭제
- 제 1 반도체 물질을 포함하는 이방성 나노결정 코어; 및
이방성 나노결정 코어를 부분적으로 또는 전체적으로 둘러싸는 상이한 제 2 반도체 물질을 포함하는 나노결정 쉘을 포함하고,
이방성 나노결정 코어는 나노결정 쉘에 대해 비대칭 배향으로 배치되는, 반도체 구조물. - 제 62항에 있어서, 나노결정 쉘이 이방성 나노결정 코어를 완전히 둘러싸는 반도체 구조물.
- 제 62항에 있어서, 나노결정 쉘이 부분적으로만 이방성 나노결정 코어를 둘러싸서, 이방성 나노결정 코어의 일부가 노출되는, 반도체 구조물.
- 제 62항에 있어서, 나노결정 쉘이 장축을 지니고, 이방성 나노결정 코어가 장축을 따라 센터를 벗어나 배치되는, 반도체 구조물.
- 제 62항에 있어서, 나노결정 쉘이 단축을 지니고, 이방성 나노결정 코어가 단축을 따라 센터를 벗어나 배치되는, 반도체 구조물.
- 제 66항에 있어서, 나노결정 쉘이 장축을 지니고, 이방성 나노결정 코어가 또한 장축을 따라 센터를 벗어나 배치되는, 반도체 구조물.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20230021571A (ko) * | 2021-08-05 | 2023-02-14 | 한국과학기술연구원 | 표면 개질된 양자점, 이의 제조 방법, 및 이를 포함하는 양자점-폴리머 복합체 또는 전자 소자 |
| KR102760177B1 (ko) | 2021-08-05 | 2025-01-24 | 한국과학기술연구원 | 표면 개질된 양자점, 이의 제조 방법, 및 이를 포함하는 양자점-폴리머 복합체 또는 전자 소자 |
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