KR102420429B1 - 양자점이 내장된 산화물 반도체 기반의 광 검출기 - Google Patents
양자점이 내장된 산화물 반도체 기반의 광 검출기 Download PDFInfo
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- KR102420429B1 KR102420429B1 KR1020210075426A KR20210075426A KR102420429B1 KR 102420429 B1 KR102420429 B1 KR 102420429B1 KR 1020210075426 A KR1020210075426 A KR 1020210075426A KR 20210075426 A KR20210075426 A KR 20210075426A KR 102420429 B1 KR102420429 B1 KR 102420429B1
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- H01L31/1136—
-
- H01L31/035218—
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- Thin Film Transistor (AREA)
- Light Receiving Elements (AREA)
Abstract
Description
도 2는 본 발명의 일 실시예에 따른 광 검출기의 제조 공정을 개략적으로 나타낸 것이다.
도 3은 본 발명의 일 실시예에 따른 광 검출기의 시간에 따른 동작 특성 변화를 나타낸 것이다.
도 4는 본 발명의 일 실시예에 따른 광 검출기의 양자점층 및 상부 산화물 반도체층의 유무에 따른 동작 특성을 나타낸 것이다.
도 5는 본 발명의 일 실시예에 따른 광 검출기의 상부 산화물 반도체층의 두께 변화에 따른 동작 특성을 나타낸 것이다.
도 6은 본 발명의 일 실시예에 따른 광 검출기의 양자점층 형성 시 스핀 코팅 회전수 변화에 따른 동작 특성을 나타낸 것이다.
도 7은 본 발명의 일 실시예에 따른 광 검출기의 양자점층 형성 시 스핀 코팅 횟수 변화에 따른 동작 특성을 나타낸 것이다.
구조 | Max. Sat. (㎠/Vs) | On/off 비율 | 캐리어 농도 |
IGTO | 40 | 108.5 | 3.5 x E17 |
IGTO/PbS | 25 | 107.5 | 3.8 x E17 |
IGTO/PbS/IGTO | 43 | 108 | 5.7 x E17 |
구조 | IGTO(T) 두께 (nm) |
Max. Sat. (㎠/Vs) |
On/off 비율 | 캐리어 농도 |
IGTO(B)/PbS/IGTO(T) | 3.5 | 43 | 108 | 5.7 x E17 |
IGTO(B)/PbS/IGTO(T) | 7 | 36 | 108 | 8.1 x E17 |
IGTO(B)/PbS/IGTO(T) | 15 | 33 | 108 | 3.5 x E18 |
30: 하부 채널층 40: 광반응층 50: 상부 채널층
60: 소스 전극 70: 드레인 전극
Claims (5)
- 기판;
상기 기판 상에 위치하는 절연층;
상기 절연층 상에 위치하며, 제1 산화물 반도체를 포함하는 하부 채널층;
상기 하부 채널층 상에 위치하며, 양자점을 포함하는 광반응층;
상기 광반응층 상에 위치하며, 제2 산화물 반도체를 포함하는 상부 채널층; 및
상기 상부 채널층 상에 위치하며, 상부 채널층의 양 단부에 이격되어 배치되는 소스 전극 및 드레인 전극
을 포함하는 광 검출기로서,
상기 광반응층의 두께가 20 내지 30nm이고, 상기 상부 채널층의 두께가 2 내지 10nm이며,
상기 광반응층 및 상부 채널층의 두께 비율이 3:1 내지 8:1이고,
상기 제1 및 제2 산화물 반도체가 In-Ga-Sn-O (IGTO)이며,
130 내지 170℃로 열처리 된, 광 검출기. - 제 1 항에 있어서,
상기 하부 채널층의 두께가 5 내지 50nm인, 광 검출기. - 제 1 항에 있어서,
상기 제1 산화물 반도체 및 제2 산화물 반도체가 각각 독립적으로 인듐(In), 갈륨(Ga), 주석(Sn), 아연(Zn), 알루미늄(Al) 및 마그네슘(Mg)으로 구성된 군에서 선택되는 1종 이상의 금속 원소를 함유하는 금속 산화물인, 광 검출기. - 제 1 항에 있어서,
상기 양자점이 IV-VI족 반도체 화합물, II-VI족 반도체 화합물, III-V족 반도체 화합물 및 IV족 반도체 화합물로 구성된 군에서 선택되는 1종 이상을 포함하는, 광 검출기. - 삭제
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