Organic-inorganic halide perovskites have been intensively re-investigated due to their applications, yet the opto-electronic function of organic cation remains unclear. Through organic-selective resonant Auger electron spectroscopy measurements on well-defined single crystal surfaces, we find evidence for electronic coupling in unoccupied states between and inorganic sub-lattices prototypical ...

The title compound, (C8H12NO)2[Co(H2P2O7)2(H2O)2]·2H2O, crystallizes isotypically with its Mn(II) analogue. It consists of alternating layers of organic cations and inorganic complex anions, extending parallel to (100). The complex cobaltate(II) anion exhibits -1 symmetry. Its Co(2+) atom has an octa-hedral coordination sphere, defined by two water mol-ecules in apical positions and two H2P2O7 ...

As a prototype of organic−inorganic hybrid perovskites, CH3NH3PbI3 is attracting extensive attention because of its applications in high-power-conversion-efficiency solar cells. However, the mixedhalide perovskite CH3NH3PbI3−xClx exhibited superior carrier diffusion properties in recent experiments. Using first-principles calculations and the Berry phase method, we calculated the crystal struct...

The control of the cation composition formamidinium (FA), methylammonium (MA), and cesium (Cs) has been used to engineer significant improvements in organic–inorganic perovskite solar cells. However, thermal stability mixed-cation cells is not fully understood. In this work, we present results an experimental study double-cation perovskites [(FAPbI 3 ) 0.97 (MAPbBr 0.03 ] [(FAMA)-perovskite (PS...

Metal halide perovskites such as methylammonium lead iodide (MAPbI3) are highly promising materials for photovoltaics. However, the relationship between the organic nature of the cation and the optoelectronic quality remains debated. In this work, we investigate the optoelectronic properties of fully inorganic vapour-deposited and spin-coated black-phase CsPbI3 thin films. Using the time-resolv...

One of the ultimate goals of ion chromatography is to determine both anions and cations found in samples with a single chromatographic run. In the present article, recent progress in ion-exclusion/ion-exchange chromatography for the simultaneous determinations of inorganic anions and cations are reviewed. Firstly, the principle and the control for the simultaneous separation and detection of ...

The optoelectronic properties of hybrid perovskites can be easily tailored by varying their components. Specifically, mixing the common short organic cation (methylammonium (MA)) with a larger one (e.g., butyl ammonium (BA)) results in 2-dimensional perovskites with varying thicknesses of inorganic layers separated by the large organic cation. In both of these applications, a detailed understan...

2D Perovskites In article number 2100495, Hua Yu, Xueqing Xu, and co-workers introduced the mixed organic spacer cation n-butylammonium (BA) 1-naphthalenemethylammonium (1-NMA) in perovskites to manipulate interlayer interactions between bulky cations inorganic slabs, leading an efficient air-stable perovskite solar cell.

We evaluated the use of ion-exclusion chromatographic systems for analyzing the behavior of inorganic ions (e.g., bicarbonate, sulfate, chloride, nitrate, phosphate, dissolved silicate, sodium, ammonium, potassium, magnesium, and calcium ions) in a suburban river located in Jakarta, Indonesia. Carbonate, phosphate, and silicate ion concentrations were determined using ion-exclusion chromatograp...