Photoelectric Properties Of Sliver-Plasmon Resonance Enhanced TiO₂-Based Photoelectrochemical Photovoltaic Cells

TiO₂ as a kind of multifunctional broadband semiconductor material has the good physical and chemical properties,it is widely applied to solar cells,UV detector and other fields.Dye-sensitized solar cells as the typical third generation of solar cells attract the wide attentions by their simple process,cheap price and other advantages.In the traditional TiO₂ nanocrystalline photoanode,due to nanoparticles grain-boundary resistance is larger,and the electronic path to the conductive substrate is longer that cause the electronic composite loss at the interface becomes larger.In addition,nano photoanode has the weaker scattering ability for the light,so it has the weaker capture efficiency for the light.Due to the good conductivity of metal Ag and the plasmon resonance effect of nanostructure can improve the conductivity of photoanode and enhance the light absorption.In this paper,we prepare Ag nanowires and Ag nanoparticles by the different hydrothermal conditions,and then respectively mix them to TiO₂photoanode,later on,we make a detailed research on the different mixing ratios have the impact on AgNWs-TiO₂ composite photoanode dye-sensitized solar cells and Ag@SiO₂-TiO₂ composite photoanode self-supply UV detector properties,the specific content is shown in the following:?1?This paper carries out the reduction for AgNO₃ in ethylene glycol by hydrothermal method under the different conditions,Ag nanowires and Ag nanoparticles can be got.The diameter of Ag nanowire is at among 100 to 900nm,the diameter of Ag nanoparticle is around 35nm,make Ag nanoparticle surface is wrapped with a layer of SiO₂ thin film by hydrothermal method,the thickness is around 3nm.?2?Apply Ag nanowire and TiO₂ composite thin film to dye-sensitized solar cells,under the conditions of the mixing concentration of Ag nanowire is 6 wt%,AM 1.5G standard sunshine,the highest short-circuit current density of DSSC is 5.71 mA cm^-2 by the measurement,photoelectric conversion rate is reached to 2.87%,which is enhanced2 times than the prepared pure TiO₂ based on DSSC.?3?Apply Ag@SiO₂ and TiO₂ composite thin film to self-supply UV detector,under0 V bias voltage,light intensity of 40 mW cm^-2,365 nm UV light,the highest short-circuit current density of self-supply UV detector is 2.97 mA cm^-2,the response rising time is 0.016 s,decay time is 0.026 s,switch ratio is reached to 2812.The current density shows the linear increasing with the enhancing light intensity,the prepared self-supply UV detector can be accurately applied to UV light detection.