Song, Woo-Seuk Jang, Eun-Pyo Kim, Jong-Hoon Jang, Ho Seong Yang, Heesun 2024-01-20T13:02:36Z 2024-01-20T13:02:36Z 2021-09-01 2013-02 1388-0764 https://pubs.kist.re.kr/handle/201004/128400 CuInS2 quantum dots (QDs) have been recently highlighted as blue-to-yellow color converters for the demonstration of QD-based white light-emitting diodes (LEDs) owing to their advantageous fluorescent attributes including a broadband yellow emission and exceptional quantum yield. Similar to other types of elaborate core/shell structured QDs, however, core/shell QDs of CuInS2/ZnS are also susceptible to the photo-induced degradation, rendering them inappropriate for the practical application to high operational stability white LED. In this study, CuInS2/ZnS QDs are overcoated with the unprecedented oxide phase of ZnGa2O4 to enhance their photostability, and the resulting CuInS2/ZnS/ZnGa2O4 QDs are characterized with X-ray diffraction and transmission electron microscope. The operational stability test of CuInS2/ZnS/ZnGa2O4 QD-based white LED is performed and compared with that of uncoated CuInS2/ZnS QD-based one, and the efficacy of ZnGa2O4 overlayer is proved in mitigating the photodegradation of QDs and thus improving the device stability. English SPRINGER NANOCRYSTALS ELECTROLUMINESCENCE SILICA ROBUST Unique oxide overcoating of CuInS2/ZnS core/shell quantum dots with ZnGa2O4 for fabrication of white light-emitting diode with improved operational stability Article 10.1007/s11051-013-1462-3 1 JOURNAL OF NANOPARTICLE RESEARCH, v.15, no.2 JOURNAL OF NANOPARTICLE RESEARCH 15 2 scie scopus 000318550400032 2-s2.0-84873332610 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article NANOCRYSTALS ELECTROLUMINESCENCE SILICA ROBUST CuInS2/ZnS quantum dots Blue-to-yellow color converters White light-emitting diodes ZnGa2O4 shell Operational stability