Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Determining ultrafast carrier dynamics of hybrid perovskites at various
  stages of nucleation and growth kinetics   With hybrid organic-inorganic perovskites increasing its technological reach,
from photovoltaics solar cells to light-emitting devices, to nanoscale
transistors, it is critical to establish the role of microstructures in
dictating how carrier dynamics dictate device efficiency. Here we report on the
ultrafast dynamics of charge carriers in hybrid perovskites at various stages
of nucleation and growth kinetics. A solution-processed fabrication technique,
with spin-coating conditions optimized to control the nucleation density of an
intermediate phase, converts to hybrid perovskites upon a temperature gradient
annealing. This strategy decouples the nucleation and growth steps that lead
eventually to large-grain thin films, allowing us to probe electronic and
carrier dynamic differences. We find, surprisingly, that the nucleating
microcrystals already display the electronic properties of hybrid perovskites
and share similar femtosecond-to-nanosecond dynamics as large-grain hybrid
perovskite thin films.

7
The categories of this paper are: hep-th
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The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
10
The categories of this paper are: q-bio