Chemistry Department Seminar I

Events

Improving the Performance of Perovskite Solar Cells via Solvent Engineering

Tianhao Yan (PhD Student)

Abstract

Solvent engineering has been proved to be a very effective way to enhance the performance of the solar cells by improving the coverage, the thickness and the morphology of the perovskite films. Here we report the effects of the mixed solvents of N, N-dimethylformamide (DMF) and -butyrolactone (GBL) on the performance of the solar cells with a device structure of ITO/PEDOT:PSS/CH3NH3PbI3-xClx/PCBM/Al. For example, when the pure GBL was used the solvent, the devices gave an average PCE 9.27%, while with the mixed solvent (GBL:DMF = 3:1(v/v)), the average PCE became 11.07%, an increase of 19.4%. The perovskite films from the different solvents were characterized by UV-Vis, XRD and SEM.

Novel Nano Catalysts for Bio-oil Upgrading

Adel Baimoldina(MRes Student)

Abstract

Biomass is considered as one of the best options for providing a renewable transportable fuel, called bio-oil, through the process of fast pyrolysis with no CO2 emissions and producing diverse chemicals with a high quality. The bio-oil direct application as a fuel for transportation is challenging
due to product instability caused by the high oxygen content. Thus, catalytic upgrading is required for the utilization of bio-oil. Hence, in this research, novel inorganic nano catalysts, namely metal oxides, their composites and supported materials, will be developed to reduce oxygenates contents in the final products.