Here we present compelling evidences that CH3NH3PbI3 crystals self-grown on FTO/TiO2 substrate consist of ferroic domains with alternating polar and nonpolar orders, in contrast to previous experimental and theoretical expectations, and polar domains possess reduced photocurrent. It is found that polar...
In view of the continued controversy concerning the polar/nonpolar nature of the hybrid perovskite system, CH3NH3PbI3, we report the first investigation of a time-resolved pump-probe measurement of the second harmonic generation efficiency as well as using its more traditional form as a sensitive ...
Here we present compelling evidences that CH3NH3PbI3 crystals self-grown on FTO/TiO2 substrate consist of ferroic domains with alternating polar and nonpolar orders, in contrast to previous experimental and theoretical expectations, and polar domains possess reduced photocurrent. It is found that polar...
Nevertheless, the exact atomic structure of OIHPs is still unsettled, with two possible space groups, polar I4cm and nonpolar I4/mcm still hotly debated depending on the orienta- tions of polar ions such as MA+ 14. While many perovskite oxides are polar with strong ferroelectricity, the ...
How can you determine if CH3OH is polar or nonpolar? What is the predominant intermolecular force in the liquid state of each of these compounds: methanol (CH3OH), carbon tetrachloride (CCl4), and hydrogen chloride (HCl)? Decide which substance in the following pa...
The cesium oleate and CH_3NH_3Br(MABr) are prepared and then injected into the nonpolar solvent of octadecene including oleic acid, oleylamine, and lead halide. In the synthesis of organic-inorganic perovskites of CH_3NH_3PbBr_3, the frequently-used polar solvent of dimethylformamide or other...
the promising optoelectronic properties including high carrier mobility, long charge diffusion length and superior power conversion efficiency13. Nevertheless, the exact atomic structure of OIHPs is still unsettled, with two possible space groups, polar I4cm and nonpolar I4/mcm still hotly debated depen...