The Preparation Of High Performance Photoanode And Its Application In Perovskite Solar Cells

The current energy consumption is in constant growth,the depletion of traditional energy sources such as fossil fuel and the environmental pollution problems which caused by its combustion is increasingly prominent,most people are pay more attention on it.So it is imperative to looking for cheap,clean and renewable new energy.Most of them,the solar energy on earth is inexhaustible,at the same time,it is generally accepted that the most clean energy,and gain people's favor.Recently,perovskite solar cell?PSC?has been focusing on because of its low cost,simple preparation.PSC mainly consists of electric transport layer?light absorption layer?hole transport layer and the gold of electrodes.The electric transport layers play a most important role in improving the performance of perovskite solar cells,the main three research contents and results are as following:?1?Firstly,with the titanium butoxide as the source of Ti,the highly crystalline truncated rhombic and spherical shape were accomplished using a solvothermal method.The two Ti O₂ nanocrystalline of toluene scatter liquid were spun on conduct glass,and the Ti O₂ are introduced into PSCS as an efficient electric transport layer,by optimizing the concentration of Ti O₂,the best performance of PSCS can be obtained.The experimental results show that when the concentration of truncated rhombic Ti O₂ is 20 mg/ml,we can obtain the photoelectric conversion efficiency of 17.29%.when the concentration of spherical Ti O₂ is 20 mg/ml too,the PSC achieved a power conversion efficiency of 18.31%.and then the device is placed in the glove box,after 240 h,the stability is good.?2?Secondly,using tin chloride pentahydrate as the source of Tin,the Sn O₂ nanocrystalline with a diameter of 4nm was synthesized by a hydrothermal method,and was to be assembled into structure of FTO/Sn O₂/CH3NH3 Pb I3/Spiro-OMe TAD/Au,the effect of concentration on the performance has been demonstrated,when the concentration of Sn O₂ was 6mg/ml,the photoanode had good electrical conductivity,with the front of the irradiation of the incident light intensity?100 m W/cm2?,the photoanode can make the PSC photoelectric efficiency reached 17.25% and was higher 27.30% than that of PSC with a traditional photoanode.During the repeatability and stability test,we found the preparation device is high stability and the attenuation rate is low.?3?Thirdly,with the tin chloride pentahydrate and zinc acetate as the source of Tin and Zinc respectively,the highly crystalline and ruled-shape Zn₂SnO₄ nanosphere with a diameter of 20 nmwas prepared by a simple hydrothermal synthesis method.The Zn₂SnO₄nanocrystalline of ethanol scatter liquid was spun on tidy and annealed Ti O₂ smoothmembrane,and was assembled into the structure of FTO/Ti O₂/Zn₂SnO₄/CH3NH3 Pb I3/Spiro-OMe TAD/Au,by changing the thickness of Zn₂SnO₄ mesoporous layer through changing the spin speed to get the optimal efficiency,the study found that when the spin speedof Zn₂SnO₄ is 4000rpm/min,the battery power conversion efficiency was up to 17.21%.Put the PSC in the glove box,after 240 h,the stability of PSC was still good,which suggested that Zn₂SnO₄ was a king of very potential mesoporous electron transport materials.