Lee, Sun-Hyoung Han, Chang-Yeol Song, Seung-Won Jo, Dae-Yeon Jo, Jung-Ho Yoon, Suk-Young Kim, Hyun-Min Hong, Seung ki Hwang, Jun Yeon Yang, Heesun 2024-01-19T17:04:18Z 2024-01-19T17:04:18Z 2021-09-05 2020-07 0897-4756 https://pubs.kist.re.kr/handle/201004/118448 Last decade witnessed great advancement in the photoluminescent (PL) quality of visible III-V InP quantum dots (QDs) toward bright, sharp emissivity. Now, InP QDs hold an unrivaled position in the field of next-generation display devices. In an effort to offer non-Cd green QDs as potential alternatives to InP counterparts, in this work, the first viable synthesis of II-VI ternary ZnSeTe QDs is explored. After successful growth of ZnSeTe alloy cores enabled by a balanced precursor reactivity of anions (i.e., Se and Te), sequential triple shells of ZnSe/ZnSeS/ZnS with stepwise type-I energetic potentials are formed. The resulting heterostructured ZnSeTe/ZnSe/ZnSeS/ZnS QDs produce tunable PL wavelengths of 495-532 nm along with high PL quantum yields (QY) of 68-83%, depending on a Te/Se feed molar ratio used for core synthesis. To further evaluate performance of the present ZnSeTe QDs as electroluminescent (EL) emitters, the first fabrication of a solution-processed, multilayered green QD-light-emitting diode (QLED) by adopting Te/Se = 0.28-based triple-shelled QDs with a PL peak of 520 nm and QY of 80% is demonstrated. This device produces promising EL outcomes up to 18 420 cd/m(2) in luminance and 7.6% in external quantum efficiency, outperforming most of green InP QLEDs reported to date. English American Chemical Society ZnSeTe Quantum Dots as an Alternative to InP and Their High-Efficiency Electroluminescence Article 10.1021/acs.chemmater.0c01596 1 Chemistry of Materials, v.32, no.13, pp.5768 - 5775 Chemistry of Materials 32 13 5768 5775 N scie scopus 000551412800037 2-s2.0-85090390770 Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article LIGHT-EMITTING-DIODES HIGH-BRIGHTNESS COLOR-PURE DEVICES SHELL NANOCRYSTALS quantum dot TEM ZnSeTe