Son, Dong-Ick Park, Dong-Hee Choi, Won Kook Kim, Tae Whan 2024-01-20T21:03:40Z 2024-01-20T21:03:40Z 2021-09-03 2009-07-08 0957-4484 https://pubs.kist.re.kr/handle/201004/132319 A hybrid polymer-nanocrystal (NC) light-emitting diode ( LED) device with a single active layer structure is simply fabricated by a spin coating. From a high-resolution transmission electron microscopy (HRTEM) study, each PVK polymer particle is observed to be capped with TPBi molecules and CdSe/ZnS NCs are mainly distributed along the circumference of PVK and TPBi surfaces, resulting in a core-shell polymer-NC hybrid of [CdSe/ZnS]/TPBi/[CdSe/ZnS]/PVK. An Al/[CdSe/ZnS]/TPBi/[CdSe/ZnS]/PVK/indium-tin oxide(ITO)/glass LED shows electroluminescence (EL) centered at around 585 nm at the forward bias of +10 V, which clearly reveals that CdSe/ZnS NCs existing at the interface between PVK and TPBi act as recombination centers for excitons. In particular, EL can be observed at both forward bias and reverse bias, and this means that this device with an isotropic distribution of NCs has an inversion symmetry. English IOP PUBLISHING LTD ORGANIC THIN-FILMS TRANSPORT DEVICES Electroluminescence of a single active layer polymer-nanocrystal hybrid light-emitting diode with inversion symmetry Article 10.1088/0957-4484/20/27/275205 1 NANOTECHNOLOGY, v.20, no.27 NANOTECHNOLOGY 20 27 scie scopus 000267089600007 2-s2.0-67649361988 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Science & Technology - Other Topics Materials Science Physics Article ORGANIC THIN-FILMS TRANSPORT DEVICES electroluminescence single active polymer-Nanocrystal hybrid LED inversion symmetry