In this study, we investigate the optical properties of InP/ZnS core/shell quantum dots (QDs) by controlling the synthesis temperature of InP. The size of InP determined by the empirical formula tends to increase with temperature: the size of InP synthesized at 140oC and 220oC is 2.46 nm and 4.52 nm, respectively. However, the photoluminescence (PL) spectrum of InP is not observed because of the formation of defects on the InP surface. The growth of InP is observed during the deposition of the shell (ZnS) on the synthesized InP, which is ended up with green-red PL spectrum. We can adjust the PL spectrum and absorption spectrum of InP/ZnS by simply adjusting the core temperature. Thus, we conclude that there exists an optimum shell thickness for the QDs according to the size.

• 서한욱(한국생산기술연구원 한국희소금속산업센터, 인하대학교 재료공정공학부) | Han Wook Seo
• 정다운(한국생산기술연구원 한국희소금속산업센터) | Da-Woon Jeong
• 김민영(한국생산기술연구원 한국희소금속산업센터) | Min Young Kim
• 현승균(인하대학교 재료공정공학부) | Seoung Kyun Hyun
• 온지선(한국생산기술연구원 한국희소금속산업센터) | Ji Sun On
• 김범성(한국생산기술연구원 한국희소금속산업센터, 과학기술연합대학원대학교 희소소재 및 반도체패키징공학) | Bum Sung Kim Corresponding author