한국전기전자재료학회:학술대회논문집 (Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference)
- 한국전기전자재료학회 2004년도 하계학술대회 논문집 Vol.5 No.1
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- Pages.56-59
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- 2004
HgTe와 HgTe/CdTe core-shell 구조의 나노입자의 광학적 특성 비교
Optical properties of HgTe and HgTe/CdTe core-shell structured nanocrystals
- 박병준 (고려대학교 전기공학과) ;
- 김현석 (고려대학교 전기공학과) ;
- 조경아 (고려대학교 전기공학과) ;
- 김진형 (고려대학교 전기공학과) ;
- 이준우 (고려대학교 전기공학과) ;
- 김상식 (고려대학교 전기공학과)
- Park, Byoung-Jun (Department of Electrical Engineering, Korea University) ;
- Kim, Hyun-Suk (Department of Electrical Engineering, Korea University) ;
- Cho, Kyoung-Ah (Department of Electrical Engineering, Korea University) ;
- Kim, Jin-Hyong (Department of Electrical Engineering, Korea University) ;
- Lee, Joon-Woo (Department of Electrical Engineering, Korea University) ;
- Kim, Sang-Sig (Department of Electrical Engineering, Korea University)
- 발행 : 2004.07.05
초록
HgTe and HgTe/CdTe core-shell structured nanocrystals(NCs) were synthesized in aqueous solution by colloidal method. HgTe and HgTe/CdTe NCs structure showed very similar XRD patterns because of the same lattice constant and crystal structure of both samples. The absorption and photoluminescence(PL) spectrum of the synthesized HgTe NCs revealed the strong exitonic peak in the IR region. The PL spectrum of HgTe/CdTe NCs have the intense peak in about 700nm shorter than that of HgTe by 400nm. The photocurrent measurement of colloidal NCs are performed using He-Ne laser for light source. The photocurrent of HgTe NCs shows the instant increased current response to light, but HgTe/CdTe NCs revealed a decreased current when lighted to the sample. In the vacuum condition, it shows reverse result that current increased under the illumination of light and it is thought that the molecules like the hydro-oxygen gas in the air give an important effect on the current mechanism.