Preparation And Characterization Of AgNW And Metal Oxide/AgNW Transparent Conductive Films

Silver nanowire?AgNW?transparent conductive films were recently received much attention as a replacement for indium tin oxide?ITO?and used in various electronic devices such as touch panels,organic solar cells,and displays.AgNW was prepared by polyol method.AgNW coated on PET and glass substrates thin films were fabricated by spin coating and lamination solution method.The metal oxide/AgNW films were fabricated with different density of AgNW/IPA?mg/ml?solutions by Sol-gel method,layer by layer deposition method and spin coating method.The samples were characterized by XRD,SEM,TEM,XPS,Ultraviolet–visible spectroscopy and four-point probes methods.This paper demonstrated a widespread study of AgNW transparent and conductive electrodes,including a scalable fabrication process,morphologies,optical properties,sheet resistance,and numerous ways to develop the performance.AgNWs were prepared by polyol method under synthesis parameters including the amount of silver nitrate?0.08 mol/L-0.7 mol/L?,the molecular weights of PVP?24000-1300000 g/mol?,injection rates?1-7 ml/min?and various initial reaction temperatures?140?C-170?C?,and the diameter and length of AgNWs were?40-200 nm,1-15mm?,?40-130nm,4-25mm?,?25-110 nm,10 to above 100mm?and?20-100 nm,10 to above 100mm?respectively.Therefore,AgNW?170?C?result was the best uniform AgNW in this paper.SEM images confirmed that the ratio of the length to diameter was being greater than 1000?diameter=85 nm and length=100mm,length/diameter ratio=1.17?10³?.XRD,SEM and TEM results confirmed that uniform AgNWs grew in?111?and?100?orientations.This paper demonstrated the comparison of thin films of AgNWs coated on PET and glass substrates by lamination solution and spin coating and their transmittance and sheet resistance were 88%,82%and 13W/sq,16.55W/sq respectively.AgNW/PET performed nearly 140?cycles of bending.AgNWs/PET was more flexible than AgNWs/glass.AgNW thin films were easily oxidized and controlled with HCl.Multilayer structures electrodes in WO₃/AgNW/WO₃/TiO₂/Epoxy/PET,WO₃/AgNP/WO₃/TiO₂/PET,CuO/AgNW/CuO/TiO₂/Epoxy/PET and CuO/AgNP/CuO/TiO₂/PET were firstly prepared by lamination solution and spin coating successfully for semiconductor application et al.Their sheet resistance and transmittance were 17W/sq,82%,27.5W/sq,53%,19.2W/sq,74%and 28W/sq,49%respectively.The samples were characterized by XPS,SEM and transparent conductive properties demonstrated electrodes with AgNW were much better than those with AgNP.CrO₃ and MnO₂ layers were explored to composite in multilayer structures of AgNW and AgNP.Their sheet resistance and transmittance of these electrodes were 24.7W/sq,72%,30W/sq,52%,20W/sq,65%and 25W/sq,45%Multilayer structures electrodes of respectively in which the electrode with AgNW showed the better properties.XPS results confirmed that metal oxide/AgNW and metal oxide/AgNP thin films contained Ag3d/2,Ti2p3/2,W4f,Cu2p/2,Cr2p/2,Mn2p/2 peaks and these peaks were corresponding to Ag⁺,Ti⁴⁺,W⁶⁺,Cu²⁺,Cr²⁺,and Mn²⁺respectively.Density?1 mg/ml?of AgNW/IPA solution produced good transmittance and low sheet resistance for all metal oxide/thin films.HCl used to control the oxidation of AgNW surface on thin films.