scholarly journals Investigating the Tetragonal‐to‐Orthorhombic Phase Transition of Methylammonium Lead Iodide Single Crystals by Detailed Photoluminescence Analysis

2020 ◽  
Vol 8 (17) ◽  
pp. 2000455 ◽  
Author(s):  
Konstantin Schötz ◽  
Abdelrahman M. Askar ◽  
Anna Köhler ◽  
Karthik Shankar ◽  
Fabian Panzer
Keyword(s):  
Phase Transition ◽  
Single Crystals ◽  
Orthorhombic Phase ◽  
Lead Iodide ◽  
Methylammonium Lead Iodide

Low-temperature luminescence in organic-inorganic lead iodide perovskite single crystals

2021 ◽  
Author(s):  
Irina Vladimirovna Zhevstovskikh ◽  
Nikita Averkiev ◽  
Maksim Sarychev ◽  
Olga Semenova ◽  
Oleg Tereshchenko
Keyword(s):  
Single Crystals ◽  
Thermal Evolution ◽  
Free Exciton ◽  
Orthorhombic Phase ◽  
Lead Iodide ◽  
Acceptor Pair ◽  
Donor And Acceptor ◽  
Donor Acceptor ◽  
Pl Emission ◽  
Methylammonium Lead Iodide

Abstract We present temperature and laser-power dependent photoluminescence (PL) study of methylammonium lead iodide (CH3NH3PbI3) single crystals in the orthorhombic phase. At temperatures below 140 K, we revealed the multi-component PL emission. In addition to a free exciton with an energy of 1.65 eV, we found emission bands with peaks approximately equal to 1.6 eV, 1.52 eV, and 1.48 eV. Analysis of the thermal evolution of the intensities, peak positions, and linewidths of all the PL bands allowed one to determine their origin. We attributed the PL peak with the energy of 1.6 eV to a bound exciton, while the free exciton-bound exciton splitting energy is 50-60 meV. The PL emission with an energy of 1.52 eV can be explained by the donor-acceptor pair (DAP) recombination, where donor and acceptor defects have a depth of about 12 meV and 120 meV, respectively. MA (CH3NH3) interstitials (MA+i ) and lead vacancies (V2-Pb) are the most suitable for the DAP transition to occur in CH3NH3PbI3 crystals. The 1.48 eV PL emission is consistent with the recombination of self-trapped excitons, and interstitial iodine is likely to be an active trap source. We found the variation of the self-trapped depth from 15 meV (at T<80 K) to 53 meV (at T>80 K) with increasing the temperature. Although the multi-component PL emission in CH3NH3PbI3 single crystals appears at low temperatures, defects and excitonic traps that cause this emission can affect the photophysics of hybrid perovskites at higher temperatures.

Properties of methylammonium lead iodide peerovskite single crystals

2017 ◽  
Vol 58 (8) ◽  
Author(s):  
E. S. Yudanova ◽  
◽  
T. A. Duda ◽  
O. E. Tereshchenko ◽  
O. I. Semenova ◽  
...  
Keyword(s):  
Single Crystals ◽  
Lead Iodide ◽  
Methylammonium Lead Iodide

scholarly journals Structures, Phase Transitions and Tricritical Behavior of the Hybrid Perovskite Methyl Ammonium Lead Iodide

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
P. S. Whitfield ◽  
N. Herron ◽  
W. E. Guise ◽  
K. Page ◽  
Y. Q. Cheng ◽  
...  
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Structural Phase ◽  
Photovoltaic Performance ◽  
Orthorhombic Phase ◽  
Structural Phase Transitions ◽  
Lead Iodide ◽  
First Order ◽  
Hybrid Perovskite ◽  
The Impact

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.

scholarly journals Room Temperature Phase Transition in Methylammonium Lead Iodide Perovskite Thin Films Induced by Hydrohalic Acid Additives

ChemSusChem ◽  
2016 ◽  
Vol 9 (18) ◽  
pp. 2656-2665 ◽  
Author(s):  
Chan Myae Myae Soe ◽  
Constantinos C. Stoumpos ◽  
Boris Harutyunyan ◽  
Eric F. Manley ◽  
Lin X. Chen ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Room Temperature ◽  
Temperature Phase ◽  
Lead Iodide ◽  
Temperature Phase Transition ◽  
Methylammonium Lead Iodide ◽  
Hydrohalic Acid

scholarly journals Effect of Thermal Cycling on the Structural Evolution of Methylammonium Lead Iodide Monitored around the Phase Transition Temperatures

Solar RRL ◽  
2019 ◽  
Vol 3 (7) ◽  
pp. 1900044 ◽  
Author(s):  
Anastasiia Glushkova ◽  
Konstantins Mantulnikovs ◽  
Gaétan Giriat ◽  
Konstantin Semeniuk ◽  
László Forró ◽  
...  
Keyword(s):  
Phase Transition ◽  
Thermal Cycling ◽  
Structural Evolution ◽  
Transition Temperatures ◽  
Lead Iodide ◽  
Phase Transition Temperatures ◽  
Methylammonium Lead Iodide
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