Ko, Eun Yee Lee, Joo In Jeon, Ju-Won Lee, In Hwan Shin, Yong Hyeon Han, Il Ki 2024-01-20T13:05:02Z 2024-01-20T13:05:02Z 2021-09-01 2013-01 0374-4884 https://pubs.kist.re.kr/handle/201004/128524 We report the optical properties of CdSe quantum dots (QDs) synthesized under various growth conditions, such as growth temperature, growth time, ligand ratio, and Cd:Se ratio of the precursors. As the growth temperature and time was increased, the peaks of the photoluminescence (PL) spectra were a red shifted, indicating that the size of QDs increased. Different ligand ratios and Cd:Se ratios of the precursors played important roles in determining the QDs size. From the PL spectra and the transmission electron microscopy image, the size distribution, as well as the size of CdSe QDs, could be controlled by using the growth conditions. The temperature-dependent PL of CdSe QDs dropped and dried on Si substrates was measured at temperatures from 15 K to 290 K. With increasing temperature, the red shift of the QDs was about 35 meV, which is noticeably smaller than that of bulk CdSe (similar to 100 meV). The influence of the temperature on the optical properties of colloidal CdSe QDs is important for an application to various devices. English KOREAN PHYSICAL SOC NANOCRYSTALS PHOTOLUMINESCENCE Size tunability and optical properties of CdSe quantum dots for various growth conditions Article 10.3938/jkps.62.121 1 JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.62, no.1, pp.121 - 126 JOURNAL OF THE KOREAN PHYSICAL SOCIETY 62 1 121 126 scie scopus kci ART001736861 000313957100021 2-s2.0-84872795083 Physics, Multidisciplinary Physics Article NANOCRYSTALS PHOTOLUMINESCENCE Quantum dots Photoluminescence CdSe Precursor