Synergistic Effect of Precursor and Interface Engineering Enables High Efficiencies in FAPbI Perovskite Solar Cells.

Formamidinium lead iodide (FAPbI)-based perovskite solar cells have gained immense popularity over the last few years within the perovskite research community due to their incredible opto-electronic properties and the record power conversion efficiencies (PCEs) achieved by the solar cells. However, FAPbI is vulnerable to phase transitions even at room temperature, which cause structural instability and eventual device failure during operation. We performed post-treatment of the FAPbI surface with octyl ammonium iodide (OAI) in order to stabilize the active phase and preserve the crystal structure of FAPbI.

Thermo-Optical and Structural Studies of Iodine-Doped Polymer: Fullerene Blend Films, Used in Photovoltaic Structures.

Optical and structural properties of a blend thin film of (1:1 wt.) of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) doped with iodine (I) and then exposed to a stepwise heating were reported and compared with the properties of doped P3HT films. The UV-Vis() absorption measurements were performed in situ during annealing runs, at the precisely defined temperatures, in a range of 20-210 °C.

Synthesis, materials characterization and opto(electrical) properties of unsymmetrical azomethines with benzothiazole core.

Optical (UV-vis and photoluminescence) properties of two soluble organic molecules based on azomethines with benzothiazole core (BTA1 and BTA2) were reported. The structures of both compounds are characterized by means FTIR, (1)H NMR, and (13)C NMR spectroscopy and elemental analysis; the results show an agreement with the proposed structure. The investigated compounds emitted blue light.