Abstract
Despite the extensive insights gained in how the microstructure impacts the device performance of metal halide perovskites (MHPs), little is known about the effect of the ferroelastic twin domains on the optoelectronic properties of MHPs. In this work, the effect of the ferroelastic twin domains on the photoluminescence (PL) behavior of CH3NH3PbI3 is investigated by correlating measurements from multiple microscopies. PL spectra and the confocal PL lifetime maps reveal no difference in wavelength of emitted light and decay dynamics between the neighboring domains, whereas PL intensity is different. We propose that the PL intensity variation is induced by the difference in light-matter interactions between neighboring domains. These results suggest that the effect of ferroelastic twin domains on the intrinsic PL behavior is negligible. We expect that this work will stimulate researchers to further explore the impact of twin domains on the photophysical properties of MHPs.
Original language | English |
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Article number | 011106 |
Journal | APL Materials |
Volume | 8 |
Issue number | 1 |
DOIs | |
State | Published - Jan 1 2020 |
Funding
This research was conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility. The research was supported by the Center for Nanophase Materials Sciences at Oak Ridge National Laboratory (Y.L., L.C., A.V.I., S.J., K.X., A.B., and O.S.O.). The research was partially sponsored by the Air Force Office of Scientific Research (AFOSR) under Grant No. FA 9550-15-1-0064, AOARD (Grant No. FA2386-15-1-4104), and the National Science Foundation (Grant No. CBET-1438181) (B.H.). This research used resources of the Center for Functional Nanomaterials, which is a U.S. DOE Office of Science Facility at Brookhaven National Laboratory under Contract No. DE-SC0012704. The authors declare no competing financial interests.
Funders | Funder number |
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Center for Nanophase Materials Sciences | |
DOE Office of Science Facility at Brookhaven National Laboratory | |
National Science Foundation | |
Air Force Office of Scientific Research | FA2386-15-1-4104, FA 9550-15-1-0064 |
Oak Ridge National Laboratory |