Structures, Phase Transitions and Tricritical Behavior of the Hybrid Perovskite Methyl Ammonium Lead Iodide
Citations Over TimeTop 1% of 2016 papers
Abstract
We have examined the crystal structures and structural phase transitions of the deuterated, partially deuterated and hydrogenous organic-inorganic hybrid perovskite methyl ammonium lead iodide (MAPbI3) using time-of-flight neutron and synchrotron X-ray powder diffraction. Near 330 K the high temperature cubic phases transformed to a body-centered tetragonal phase. The variation of the order parameter Q for this transition scaled with temperature T as Q ∼ (Tc-T)β, where Tc is the critical temperature and the exponent β was close to ¼, as predicted for a tricritical phase transition. However, we also observed coexistence of the cubic and tetragonal phases over a range of temperature in all cases, demonstrating that the phase transition was in fact first-order, although still very close to tricritical. Upon cooling further, all the tetragonal phases transformed into a low temperature orthorhombic phase around 160 K, again via a first-order phase transition. Based upon these results, we discuss the impact of the structural phase transitions upon photovoltaic performance of MAPbI3 based solar cells.
Related Papers
- → 2,4,6-Trimethylanilinium iodide(2007)8 cited
- → 2-Aminoethanaminium iodide(2012)1 cited
- The Synthesis Of Quaternary Ammonium Salts With Carbonyl Functionality And Studies Of Their Physical Properties(2002)
- → Organosilicon-Based Ionic Liquids with Iodide Anions as Iodide Sources for Dye-Sensitized Solar Cells(2015)
- Synthesis and Characterization of Quaternary Ammonium Salts Containing Carbonyl Functionality(2007)