Preparation Of AuNRs And Au@AgNRs And Their Applications In Polymer Solar Cells And Glucose Sensors

This thesis focuses on the application of gold and silver nanoparticles in polymer solar cells and enzyme-free glucose sensors.The main contents are divided into the following three parts:1.The addition of gold nanorods(AuNRs)particles in polymer solar cells is mainly due to the near-field enhancement effect brought about by the LSPR characteristics generated by AuNRs and the scattering effect of the nano-particles themselves on the incident light,which improve the light absorption of the active layer,thereby improving the photoelectric conversion efficiency(PCE)of the photovoltaic device.In this thesis,AuNRs particles with different aspect ratios(AR)were prepared by the seed growth method,and then the AuNRs with long,medium and short AR were selected to modify the zinc oxide electron transport layer of polymer solar cells based on an inverted structure of PTB7:PC7iBM.Finally,the short current density(Jsc)of the longer gold nanorods(AR=4.18)modified solar cell reached 10.81 mA/cm2,and the PCE reached 4.57%.2.Polydopamine(PDA)has strong adhesiveness,it not only binds firmly to all the substances,but also provide a new method of fixing nanoparticles and preventing aggregation,which can be used in interface modification and design.Applying PDA/metal nanoparticles composite to a polymer solar cell can increase the injection rate of the interface charge of the device and facilitate the enrichment and transfer of electrons.In this thesis,PDA films and PDA/AuNRs composite films were prepared firstly,then irradiated with different doses of electron beams.Furthermore,the films before and after irradiation were applied to polymer solar cells with inverted structure.Finally,the Jsc of the PDA/AuNRs composite;modified device was increased to 11.97 mA/cm2,and the PCE was increased to 4.75%.The PCE of the device with 50 kGy irradiated PDA/AuNRs composite modifier reached 5.66%.3.The physicochemical properties of bimetallic Au core-Ag shell nanorods(Au@AgNRs)not only maintain the original characteristics of the two nano-metal components,but also exhibit synergistic performance over single-component metals.In this thesis,we first synthesized Au@AgNRs based on the seed growth method.The prepared Au@AgNRs were then uniformly deposited on the ITO substrate as working electrode for a three-electrode system.The electrochemical behavior of the prepared Au@AgNRs/ITO composite electrode and the catalytic performance of glucose were studied by cyclic voltammetry and chronoamperometry.The Au@AgNRs/ITO composite electrode exhibited good electrochemical catalytic activity for glucose with a detection limit of 0.1 ?mol/L and a linear detection range of 20 ?mol/L to 14 mmol/L.