Efficient Solid-State Photoluminescence of Graphene Quantum Dots Embedded in Boron Oxynitride for AC-Electroluminescent Device

Cited 4 time in webofscience Cited 0 time in scopus
  • Hit : 99
  • Download : 0
Emerging graphene quantum dots (GQDs) have received much attention for use as next-generation light-emitting diodes. However, in the solid-state, pi-interaction-induced aggregation-caused photoluminescence (PL) quenching (ACQ) in GQDs makes it challenging to realize high-performance devices. Herein, GQDs incorporated with boron oxynitride (GQD@BNO) are prepared from a mixture of GQDs, boric acid, and urea in water via one-step microwave heating. Due to the effective dispersion in the BNO matrix, ACQ is significantly suppressed, resulting in high PL quantum yields (PL-QYs) of up to 36.4%, eightfold higher than that of pristine GQD in water. The PL-QY enhancement results from an increase in the spontaneous emission rate of GQDs due to the surrounding BNO matrix, which provides a high-refractive-index material and fluorescence energy transfer from the larger-gap BNO donor to the smaller-gap GQD acceptor. A high solid-state PL-QY makes the GQD@BNO an ideal active material for use in AC powder electroluminescent (ACPEL) devices, with the luminance of the first working GQD-based ACPEL device exceeding 283 cd m(-2). This successful demonstration shows promise for the use of GQDs in the field of low-cost, ecofriendly electroluminescent devices.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2018-09
Language
English
Article Type
Article
Keywords

LIGHT-EMITTING-DIODES; LUMINESCENT MATERIALS; HIGHLY EFFICIENT; POINT-DEFECTS; NITRIDE; OXIDE; POLYMER; ENHANCEMENT; COMPOSITE; EMISSION

Citation

ADVANCED MATERIALS, v.30, no.38

ISSN
0935-9648
DOI
10.1002/adma.201802951
URI
http://hdl.handle.net/10203/245880
Appears in Collection
EE-Journal Papers(저널논문)MS-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 4 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0