Inkjet-Printed Imbedded Graphene Nanoplatelet/Zinc Oxide Bulk Heterojunctions Nanocomposite Films for Ultraviolet Photodetection.

ABSTRACT: A ZnO sol-gel precursor (ZnOPr) and graphene nanoplatelets (GnPs) are mixed into a composite ink for inkjet printing photodetectors with bulk heterojunctions of ZnO/GnP on a heated SiO₂/Si substrate. Heating of the SiO₂/Si wafers at ∼50 °C was found optimal to prevent segregated droplets on the hydrophobic surface of the SiO₂/Si substrate during printing. After printing the ZnO/GnP channels, thermal annealing at 350 °C for 2 h was performed for crystallization of ZnO and formation of the ZnO/GnP heterojunctions. The GnP concentration was varied from 0, 5, 20, and 30 mM to evaluate optimal formation of the ZnO/GnP bulk heterojunction nanocomposites based on ultraviolet photoresponse performance. The best performance was observed at the 20 mM GnP concentratio

SUBMITTER: Cook B 

PROVIDER: S-EPMC6941389 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature