Byambasuren, Nyamsuren Jo, Jiyeon Ko, Hyungduk Ju, Byeong-Kwon Byun, Ji Young Jang, Ho Seong 2024-01-19T13:31:51Z 2024-01-19T13:31:51Z 2022-01-10 2021-11 2076-3417 https://pubs.kist.re.kr/handle/201004/116202 Blue-light-emitting ZnSe core (C) and ZnSe/ZnS core/shell (C/S) quantum dots (QDs) were synthesized with phosphine-free precursors by a thermal decomposition method in paraffin oil solvent and applied to QD-converted light-emitting diodes (LEDs). The optical properties of the synthesized ZnSe C and ZnSe/ZnS C/S QDs were characterized by absorption spectroscopy and photoluminescence spectroscopy. Additionally, the quantum efficiency of the QDs was investigated. Their structural properties were studied with X-ray crystallography and transmission electron microscopy. The ZnSe/ZnS C/S QDs showed deep-blue light peaking at 425 nm. The blue-light-emitting ZnSe/ZnS C/S QDs were used as color-converting materials for near-ultraviolet LED-pumped blue LEDs and combined with yellow-light-emitting Zn-Cu-In-S/ZnS C/S QDs to fabricate white LEDs. The white LEDs showed warm white light [(CIE x, CIE y) = (0.4088, 0.3987)], T-c = 3488 K, and R-a = 61.2]. The results indicate that the ZnSe/ZnS C/S QDs have good potential for white light application after further improvements to their optical properties.</p> English MDPI NANOCRYSTALS EFFICIENT BRIGHT CHEMISTRY CUINS2 CELL SE Phosphine-Free-Synthesized ZnSe/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes Article 10.3390/app112110060 1 APPLIED SCIENCES-BASEL, v.11, no.21 APPLIED SCIENCES-BASEL 11 21 scie scopus 000718558000001 2-s2.0-85118110353 Chemistry, Multidisciplinary Engineering, Multidisciplinary Materials Science, Multidisciplinary Physics, Applied Chemistry Engineering Materials Science Physics Article NANOCRYSTALS EFFICIENT BRIGHT CHEMISTRY CUINS2 CELL SE ZnSe/ZnS quantum dots core/shell structure blue LED warm white LED