jz9b03738_si_001.pdf (3.84 MB)
Imaging of the Atomic Structure of All-Inorganic Halide Perovskites
journal contribution
posted on 2020-01-17, 19:34 authored by Jeremy Hieulle, Shulin Luo, Dae-Yong Son, Afshan Jamshaid, Collin Stecker, Zonghao Liu, Guangren Na, Dongwen Yang, Robin Ohmann, Luis K. Ono, Lijun Zhang, Yabing QiAll-inorganic
halide perovskites are promising materials for optoelectronic
applications. The surface or interface structure of the perovskites
plays a crucial role in determining the optoelectronic conversion
efficiency, as well as the material stability. A thorough understanding
of surface atomic structures of the inorganic perovskites and their
contributions to their optoelectronic properties and stability is
lacking. Here we show a scanning tunneling microscopy investigation
on the atomic and electronic structure of CsPbBr3 perovskite.
Two different surface structures with a stripe and an armchair domain
are identified, which originates from a complex interplay between
Cs cations and Br anions. Our findings are further supported and correlated
with density functional theory calculations and photoemission spectroscopy
measurements. The stability evaluation of photovoltaic devices indicates
a higher stability for CsPbBr3 in comparison with MAPbBr3, which is closely related to the low volatility of Cs from
the perovskite surface.
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perovskite surfacestability evaluationphotovoltaic devicesoptoelectronic applicationsarmchair domainCs cationsBr anionsscanning tunneling microscopy inves...All-Inorganic Halide Perovskites Al...material stabilityoptoelectronic propertiesphotoemission spectroscopy measurementsMAPbBr 3CsPbBr 3 perovskitesurface structuresCsPbBr 3optoelectronic conversion efficiencytheory calculationsAtomic Structureinterface structure
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