In:
Angewandte Chemie, Wiley, Vol. 129, No. 35 ( 2017-08-21), p. 10622-10626
Abstract:
Preparation of two‐dimensional (2D) heterostructures is important not only fundamentally, but also technologically for applications in electronics and optoelectronics. Herein, we report a facile colloidal method for the synthesis of WO n ‐WX 2 ( n =2.7, 2.9; X=S, Se) heterostructures by sulfurization or selenization of WO n nanomaterials. The WO n ‐WX 2 heterostructures are composed of WO 2.9 nanoparticles (NPs) or WO 2.7 nanowires (NWs) grown together with single‐ or few‐layer WX 2 nanosheets (NSs). As a proof‐of‐concept application, the WO n ‐WX 2 heterostructures are used as the anode interfacial buffer layer for green quantum dot light‐emitting diodes (QLEDs). The QLED prepared with WO 2.9 NP‐WSe 2 NS heterostructures achieves external quantum efficiency (EQE) of 8.53 %. To our knowledge, this is the highest efficiency in the reported green QLEDs using inorganic materials as the hole injection layer.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v129.35
DOI:
10.1002/ange.201705617
Language:
English
Publisher:
Wiley
Publication Date:
2017
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