Photovoltaic conversion efficiency (PCE) of halide perovskite solar cells has risen spectacularly, yet the very crystalline structure of CH3NH3PbI3 remains ambiguous after extensive researches, and its polar nature remains hotly debated. Here we present compelling evidences that CH3NH3PbI3 crystals self...
It is found that polar and nonpolar orders of CH3NH3PbI3 can be distinguished from their distinct lateral piezoresponse, energy dissipation, first and second harmonic electromechanical couplings, and temperature variation, even though their difference in crystalline lattice is very subtle, and they ...
Classify each of the following molecules as polar or nonpolar. a. H2CO b. CH3OH c. CH2Cl2 d. CO2 Which of the following has no effect on what state in which a molecule is found? a. Number of moles. b. Mass. c. Temperature. d. Intermolecular forces. Wh...