Figure 4
From: Highly stretchable electroluminescent device based on copper nanowires electrode

(a,b) FE-SEM of ZnS:Cu,Cl particles with different magnifications. (c–e) Optical microscopy images of ZnS:Cu,Cl particles coated on Cu NW-based electrode; the weight ratio of ZnS:Cu,Cl/PDMS was 1:1, 2:1, and 3:1 in (c–e), respectively. (f–h) cross-sectional SEM images of fabricated EL devices with the corresponding weight ratio of ZnS:Cu,Cl/PDMS. (i) Thickness of emissive layer prepared with the different weight ratios of ZnS:Cu,Cl/PDMS and spin-coating speed. (j) The luminance of EL devices prepared with the different weight ratios of ZnS:Cu,Cl/PDMS.