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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국진공학회(ASCT) Applied Science and Convergence Technology Applied Science and Convergence Technology Vol.29 No.4
- 발행연도
- 2020.7
- 수록면
- 87 - 90 (4page)
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We synthesized various-sized CdSe quantum dots (QDs) capped with a binary ligand system using oleic acid (OA) and trioctylphosphine (TOP), as well as high-quality CdSe/CdS core/shell structured QDs using Cd-oleate and TOP as shell precursors. The energy of the fluorescence (FL) peak for the CdSe QDs shifted from 2.475 to 2.064 eV with increasing growth time, which resulted in increasing the size of QDs. Upon an increase in the size of QDs, the electron and hole level energies decreased due to the quantum confinement effect. The full width at half maximum (FWHM) of the FL peaks for the CdSe QDs decreased with increasing growth time because of the Se-rich surface and low OA molar ratio. In particular, the FWHM of FL peaks from the CdSe/CdS core/shell-structured QDs is smaller than that of the CdSe core QDs owing to the improved size uniformity resulting from slow continuous shell deposition and high reaction temperature. An enhanced light absorption capacity was also observed for the CdSe/CdS core/shell structure QDs.
목차
ABSTRACT
1. Introduction
2. Experimental details
3. Results and discussion
4. Conclusions
References
참고문헌 (21)
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