High-Performance Organic Light-Emitting Diode with Substitutionally Boron-Doped Graphene Anode

Abstract

The hole-injection barrier between the anode and the hole-injection layer (HIL) is of critical importance to determine the device performance of organic light-emitting diodes (OLEDs). Here, we report on a record-high external quantum efficiency (EQE) (24.6% in green phosphorescence) of OLEDs fabricated on both rigid and flexible substrates, with the performance enhanced by the use of nearly defect-free and high-mobility boron-doped graphene as an effective anode and hexaazatriphenylene hexacarbonitrile as a new type of HIL. This new structure outperforms the existing graphene-based OLEDs, in which MoO, AuCl, or bis(trifluoromethanesulfonyl)amide are typically used as a doping source for the p-type graphene. The improvement of the OLED performance is attributed mainly to the appreciable increase of the hole conductivity in the nearly defect-free boron-doped monolayer graphene, along with the high work function achieved by the use of a newly developed hydrocarbon precursor containing boron in the graphene growth by chemical vapor deposition.

Recent Progress in Defective Carbon‐Based Oxygen Electrode Materials for Rechargeable Zink‐Air Batteries

“…Various doping modes, especially N associated with other heteroatoms like NÀS, [48] NÀO, [49] NÀB, [50] NÀP [51] are widely reported. Various doping modes, especially N associated with other heteroatoms like NÀS, [48] NÀO, [49] NÀB, [50] NÀP [51] are widely reported.…”

“…Co-doping in carbon lattice with two foreign atoms is considered as an increasingly popular way to optimize the catalytic activity for it can create a synergistic effect to promote the electrocatalytic activity. Various doping modes, especially N associated with other heteroatoms like NÀS, [48] NÀO, [49] NÀB, [50] NÀP [51] are widely reported. For instance, taking advantage of i- [47] Copyright 2015, Elsevier Ltd .…”

C‐Halogenated 9,10‐Diboraanthracenes: How the Halogen Load and Distribution Influences Key Optoelectronic Properties

“…We note pronounced 1 H, 19 F-, 13 C, 19 F-, and 19 F, 19 Fc oupling;p erfluorinated 10 gives rise to ah igherorder 19 F-NMR spectrum,q ualitativelys imilart othe 1 H-NMR spectrum of I. [9,[26][27][28] The molecular structures of 1-10 and an umber of their precursor molecules have been confirmed by X-ray crystallography (cf. Ref [15] for 1, 4 and the Supporting Information for all other compounds).…”

“…Despitet he recent progress in the field, comprehensive insight into key structure-property relationships of B-PAHs is still lacking, because the required access to entire series of system-atically modulatable B-PAH derivatives still imposes af ormidable challenge to the synthetic chemist. [4][5][6] Herein, we report an array of halogenated 9,10-dihydro-9,10-diboraanthracenes (DBAs; Figure 1), which differ in the nature (i.e., 1/5, 2/3/6, 4/7)o rt he numbersa nd positions of their halogen substituents( i.e., [5][6][7][8][9][10]. In all cases, compound I serves as the benchmark for comparison purposes.…”

Luminescence performance of poly(aryl ether)s membranes with different morphologies

“…Conjugated polymers are characterized by a backbone chain of alternating double‐ and single‐bonds. Their overlapping p‐orbitals create a system of delocalized π‐electrons, which can result in widely applied in solar cell, mobile communications, organic light‐emitting diodes (OLEDs), and organic field‐effect transistors (OFETs) . Particularly, the specific luminescence of conjugated polymers such as high color purity, remarkable photoluminescence (PL) efficiency, and long life time which make these materials attach much more attention.…”