Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-dimensional bimolecular recombination in amorphous organic
  semiconductors   We consider the two-dimensional bimolecular recombination of charge carriers
in amorphous organic semiconductors having the lamellar structure. We calculate
the dependence of the effective recombination rate constant on the carrier
density taking into account the correlated nature of the energetic disorder
typical for organic semiconductors. Resulting recombination kinetics
demonstrates a very rich variety of behaviors depending on the correlation
properties of the particular semiconductor and relevant charge density range.

32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs