The Research Of Incorporation Of Crown Ethers In Lead Halide Perovskite And Its Application In Perovskite Solar Cells

Lead halide perovskite and its application in solar cells are one of the most popular research and academic forefronts in the field of new materials and new energy.To explore the feasible solutions of boosting the quality of perovskite crystal films and fabricating high-performance,durable-stability,and low-cost perovskite solar cells is the ultimate goals of this master dissertation.In this dissertation,we firstly developed an effective and general approach that by innovatively incorporating the crown ethers into the perovskite and its photovoltaic devices,a unique two dimensional-three dimensional(2D-3D)perovskite structure and outstanding device performance were achieved.The effect of crown ethers on lead halide perovskite was deeply and systematically studied through the characterization of morphology,crystal structure,and spectral characteristics,and the test of photovoltaic property and device stability,then the possible mechanism that the supramolecular interaction between crown ethers and lead halide perovskite was proposed.Finally,the power conversion efficiency(PCE)of perovskite solar cells was improved to～21%from～18%of the pristine,and the PCE of champion device reached 21.5%,20.4%and 20.9%under reverse scan,forward scan and average calculation,respectively.