perovskite and stannic-oxide

Perovskite solar cells (PSCs) based on SnO

Topics: Hydroxy Acids; Oxides; Potassium; Tin

The electron-selective layer (ESL) plays a pivotal role in the performance of perovskite solar cells (PSCs). In this study, amorphous dispersible chromium oxide (Cr

Topics: Calcium Compounds; Chromium Compounds; Electric Power Supplies; Electrochemical Techniques; Electrons; Fluorine; Microscopy, Electron, Scanning; Microscopy, Electron, Transmission; Oxides; Photoelectron Spectroscopy; Solar Energy; Tin Compounds; Titanium; X-Ray Diffraction

Altering cation and anion ratios in perovskites has proven an excellent means of tuning the perovskite properties and enhancing the performance. Recently, methylammonium/formamidinium/cesium triple-cation mixed-halide perovskites have demonstrated efficiencies up to 22 %. Similar to the widely explored methylammonium lead halide, excess PbI

Topics: Amidines; Calcium Compounds; Cesium; Electric Power Supplies; Fluorine; Iodides; Lead; Oxides; Solar Energy; Tin Compounds; Titanium

A film of perovskite-type LaFeO

Topics: Antibodies; Calcium Compounds; Electrochemical Techniques; Fluorine; Humans; Immunoassay; Interleukin-6; Limit of Detection; Oxides; Photochemical Processes; Tin Compounds; Titanium

The solution processing of pinhole-free methylammonium lead triiodide perovskite-C

Topics: Calcium Compounds; Drug Stability; Electric Power Supplies; Electron Transport; Fluorine; Fullerenes; Glass; Methylamines; Oxides; Solar Energy; Solvents; Tin Compounds; Titanium

Planar-structured HC(NH2 )2 PbI3 (FAPbI3 ) perovskite solar cells were prepared via a two-step deposition process. To investigate the role of interface, the perovskite morphology was intentionally modified by varying HC(NH2 )2 I concentration. Surface and grain sizes of the deposited FAPbI3 became rougher and larger as the HC(NH2 )2 I concentration decreased from 58.2 to 40.7 mM. Average photocurrent was improved but photovoltage deteriorated slightly with decreasing concentration. Consequently, the average efficiency was improved from 7.82 % to 10.70 % and the best efficiency of 12.17 % was obtained at 40.7 mM. Photoluminescence (PL) at TiO2 /FAPbI3 interface was reduced with decreasing concentration, which was, however, reversed at FAPbI3 /spiro-MeOTAD one. By correlating PL data and the photovoltaic performance, we concluded that the TiO2 /perovskite interface plays a crucial role in determining photocurrent while the perovskite/spiro-MeOTAD interface is important in governing photovoltage.

Topics: Calcium Compounds; Coordination Complexes; Diamines; Electric Power Supplies; Fluorine; Gold; Oxides; Solar Energy; Tin Compounds; Titanium

By subjecting amorphous flower-like TiO2 to a facile hydrothermal synthesis in the presence of Sr(2+), garden-like perovskite SrTiO3 superstructures were achieved. The amorphous TiO2 was preformed using ZnO flowers as templates. Different three-dimensional SrTiO3 architectures were coexisted in the garden, including SrTiO3 flowers composed of several hollow sword-shaped petals, many sheet-shaped petals or numerous flake-shaped petals, and SrTiO3 grass consisting of a number of long blades. These SrTiO3 superstructures were simultaneously grown on fluorine-doped tin oxide (FTO) substrates. On the basis of a comprehensive study on the effects of growth time, temperature, initial concentrations of precursor, and pH, the formation of these various hierarchical architectures was attributed primarily to the dissolution of amorphous TiO2 and precipitation of perovskite crystals, followed by the Ostwald ripening process of perovskite nanocrystals and self-organization of perovskite building blocks. Interestingly, this approach can be readily extended to create other perovskite structures, including dendritic BaTiO3 and nest-like CaTiO3, as well as PbTiO3 transformed from plate-like pyrochlore Pb2Ti2O6 after post-thermal treatment. Garden-like SrTiO3 superstructures showed a superior photocatalytic performance when compared to other as-prepared semiconductors and perovskite materials (i.e., ZnO, TiO2, BaTiO3, CaTiO3 and PbTiO3), probably due to their intrinsic photocatalytic activity and special garden-like features with a coexistence of various structures that significantly facilitated the adsorption and diffusion of methyl blue (MB) molecules and oxygen species in the photochemical reaction of MB degradation.

Topics: Adsorption; Benzenesulfonates; Calcium Compounds; Catalysis; Diffusion; Nanoparticles; Oxides; Photolysis; Strontium; Tin Compounds; Titanium; Ultraviolet Rays; Zinc Oxide