Fluorescent Alloy CsPbxMn1–xI3 Perovskite Nanocrystals with High Structural
and Optical Stability
Version 2 2017-11-09, 05:43
Version 1 2017-08-31, 15:52
Posted on 2017-11-09 - 05:43
CsPbI3 nanocrystals are still limited in their use because
of their phase instability as they degrade into the yellow nonemitting
δ-CsPbI3 phase within a few days. We show that alloyed
CsPbxMn1–xI3 nanocrystals have essentially the same optical
features and crystal structure as the parent α-CsPbI3 system, but they are stable in films and in solution for periods
over a month. The stabilization stems from a small decrease in the
lattice parameters slightly increasing the Goldsmith tolerance factor,
combined with an increase in the cohesive energy. Finally, hybrid
density functional calculations confirm that the Mn2+ levels
fall within the conduction band, thus not strongly altering the optical
properties.
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Akkerman, Quinten
A.; Meggiolaro, Daniele; Dang, Zhiya; Angelis, Filippo De; Manna, Liberato (2017). Fluorescent Alloy CsPbxMn1–xI3 Perovskite Nanocrystals with High Structural
and Optical Stability. ACS Publications. Collection. https://doi.org/10.1021/acsenergylett.7b00707
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AUTHORS (5)
QA
Quinten
A. Akkerman
DM
Daniele Meggiolaro
ZD
Zhiya Dang
FA
Filippo De Angelis
LM
Liberato Manna