Ag Alloy Based Transparent Electrodes And Its Application To Efficient Polymer Solar Cells

The electrical and optical performance of the sandwiched structure transparent conducting films based on Ag alloy were inverstigated.Specifically,the transparent conducting films with GZO/AgTi/GZO(GATG)show better thermal stability and were applied to efficient polymer solar cells.In addtion,the inversed perovskite solar cells(PSCs)based on PEDOT:PSS treated with carbon tetrafluoride using plasma technology were investigated and the fabrication procedure of PSCs based on zinc oxide were explored.The main results were shown as following:1.The optical and electrical properties of GZO/Ag alloy/GZO multilayer transparent films with AgAl,AgCr and AgTi fabricated with magnetron sputtering method were investigated.Specifically,the sheet resistance and maximum optical transmittance of GATG films are 5 ?/sq and 86%,respectively.Futhermore,the sheet resistance of GATG still keep stability under annealing at 400 ?,indicating better thermal stability compared to GZO/Ag/GZO film.The enhanced thermal stability of GATG is attributed to the formation of TiOx on Ag nanostructure surface,which can inhibit Ag atoms diffusion and aggregation.2.PTB7-TH:PC71BM based inverted OSCs with GATG electrodes got a PCE of 9.20%,which is comparable to PCE(9.23%)of the control OSCs with ITO electrode.The PCE of OSCs with GATG and ITO electrodes respectively remain 59%and 23%of the original PCE values after UV exposure for 20 min with relative humidity of 68%in air,indicating that PSCs with GATG show better UV durability.Our results suggest that GATG as an alternative to ITO electrode can obtain efficient inverted PSCs and have superior anti-UV ability due to its low UV transparency.3.PEDOT:PSS treated with plasma of carbon tetrafluoride gas was applied to perovskite solar cells as a hole transport layer.The hysteresis of PSCs were greately increased,indicating that the hysteresis effect is related to the interface of PEDOT:PSS.ZnO layer fabricated with sol-gel method or megnetron sputtering were used as an electron transport layer in PSCs.The perovskite active layer were prepared by two-step method and aether-immerse method.The ZnO layer show good electron transport ability and can accerelate the deterioration of the perovskite layer under the annealing condition.