Preparation And Application Of Silver Nanowires-based Transparent Electrodes

Flexible transparent conductive electrodes are the core parts of the next-generation electronic devices,such as flexible display,multipurpose sensors and touch panel.Silver nanowires(AgNW)are the most potential transparent conductive materials based on the excellent photoelectric properties and special structure.But current AgNW based transparent electrode has many drawbacks which restricts its application,including lack of high photoelectric properties,antioxidant capacity,thermolability and electrical stability when deformed.In order to solve those problems,many facile and Eco-friendly methods have been proposed to fabricate high performance AgNW based devices,including flexible transparent electrodes,stretchable transparent electrodes and antioxidant / thermostable flexible transparent electrodes.Moreover,the influence of AgNW with different length diameter ratios and distribution of AgNW in electrode was investigated by simulation software.At last,the performance of the fabricated flexible transparent heater and flexible transparent actuator was also tested.The main researches are as follows:? Salt pre-coated on glass substrate would help AgNW slightly aggregate around salt particles and form sparser network,which could lead to higher transmittance.Moreover,Ag+ which redeposit on junctions between AgNW could result in a further increase in conductivity.The results showed that conductivity and transmittance could be increased by 21% and 2.6% respectively.Our composite also exhibited an excellent bending performance.At last,we confirmed that the relationship between the amount of AgNW and composite properties were agreed with percolation theory.? Stretchable transparent electrodes were prepared by coating polyvinyl alcohol(PVA)solution and AgNW on common AgNW based electrodes.The results showed the resistance could only increase by 21% under tensile strain up to 20%,compared with 268% increase for common AgNW based electrodes.The performance was enhanced because of AgNW located on the top of the composite which could connect AgNW embedded in the PUA substrate and formed effectively conductive paths.Moreover,the surface structure and property of stretchable transparent electrodes have been fully characterized,which confirmed that the formation of wave shape conductive path was the reason of improved resistance stability when stretched.And different amounts of AgNW would also influence resistance stability by forming different amounts of conductive paths.? Antioxidant capacity and thermal stability of AgNW were improved by coating ion liquid(IL)on AgNW.The results indicated that antioxidant capacity of AgNW-IL electrodes was fully enhanced with only 7.04% being oxidized,compared with 19.9% for AgNW electrodes and photoelectric properties were only influenced limitedly.Furthermore,thermal stability of AgNW could also be improved effectively by coating a little more IL.The research showed that intact conductive path could be kept after 220? high temperature test for 1h.? Comsol Multiphysics simulation software was applied for multi-analysis the influence of AgNW performance and distribution on electrical property by using two models.The simulation results showed that resistance would reduce by forming more multiple circuits with higher length of AgNW.Moreover,the property of the fabricated flexible transparent heater and flexible transparent actuator have been fully characterized,which demonstrated the potential applications of AgNW transparent electrodes.