Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High-performance green and blue quantum-dot light-emitting diodes with
  eliminated charge leakage   Quantum-dot light-emitting diodes (QD-LEDs) promise a new generation of
efficient, low-cost, large-area, and flexible electroluminescent devices.
However, the inferior performance of green and blue QD-LEDs is hindering the
commercialization of QD-LEDs in display and solid-state lighting. Here, we
demonstrate best-performing green and blue QD-LEDs with ~100% conversion of the
injected charge carriers into emissive excitons. Key to this success is
eliminating electron leakage at the organic/inorganic interface by using
hole-transport polymers with low electron affinity and reduced energetic
disorder. Our devices exhibit record-high peak external quantum efficiencies
(28.7% for green, 21.9% for blue), exceptionally high efficiencies in wide
ranges of luminance, and unprecedented stability (T95 lifetime: 580,000 h for
green, 4,400 h for blue). The overall performance surpasses previously reported
solution-processed green and blue LEDs.

18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph