Son, Dong Ick Yang, Hee Yeon Kim, Tae Whan Park, Won Il 2024-01-20T07:34:46Z 2024-01-20T07:34:46Z 2021-09-05 2015-02 1359-8368 https://pubs.kist.re.kr/handle/201004/125791 Transparent colloidal ZnO quantum-dot (QD)/graphene nanocomposites were formed on poly(ethylene terephthalate) (PET) substrates. Ultraviolet (UV)-visible absorption spectra showed a shoulder peak around 350 nm corresponding to the absorption of ZnO QDs. Optical transmittance of the ZnO QD/graphene/PET multilayer was approximately 80%. High-resolution transmission electron microscopy images showed that the ZnO QDs were distributed along the circumferences of the surfaces on the graphene layers. Current-voltage and current-time measurements on the UV photodetector after bending at 300 K exhibited the ON/OFF switching states and stability resulting from the light-induced conductivity of the flexible graphene layer. (C) 2014 Elsevier Ltd. All rights reserved. English ELSEVIER SCI LTD GRAPHENE SHEETS NANOPARTICLES Transparent and flexible ultraviolet photodetectors based on colloidal ZnO quantum dot/graphene nanocomposites formed on poly(ethylene terephthalate) substrates Article 10.1016/j.compositesb.2014.09.026 1 COMPOSITES PART B-ENGINEERING, v.69, pp.154 - 158 COMPOSITES PART B-ENGINEERING 69 154 158 scie scopus 000347266600019 2-s2.0-84908372985 Engineering, Multidisciplinary Materials Science, Composites Engineering Materials Science Article GRAPHENE SHEETS NANOPARTICLES Nano-structures Electrical properties Optical properties/techniques Electron microscopy