High-current stressing of organic light-emitting diodes with different electron-transport materials

Liu, L.; Li, S.; Zhou, Yuanming; Liu, L. Y.; Cao, X. A.

doi:10.1016/j.microrel.2017.03.002

Cited by 14 publications

(10 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The energy level values in Figure 1C were taken from Ref (Liu et al, 2017) and . It can be seen that the injection of holes from ITO into the Alq 3 layer was partly prohibited due to the large energy barrier of ∼0.9-1.0 eV, while electrons can be easily injected into Alq 3 from LiF/Al.…”

Section: Resultsmentioning

confidence: 99%

Plasmonic-Enhanced Organic Light-Emitting Diodes Based on a Graphene Oxide/Au Nanoparticles Composite Hole Injection Layer

et al. 2018

View full text Add to dashboard Cite

Organic light-emitting diodes (OLEDs) have drawn a great deal of attention due to their broad applications in lighting and displaying. With the development of nanotechnology, surface plasmas have been widely used in photonics, microscopes, solar cells and biosensors. In this paper, by inserting graphene oxide (GO), Au nanoparticles (Au NPs) and GO/Au NP composite structures between the hole transport layer (NPB) and indium tin oxide (ITO) anode, respectively, the electroluminescent performance of Alq 3-based OLEDs was significantly enhanced. Compared to the reference devices, the devices with the composite inserting layer containing 10% GO/Au NP doping have the best electroluminescent performance, which improved 47.9% in maximum luminance, 49.2% in maximum current efficiency and 45.3% in maximum external quantum efficiency (EQE). Such substantial enhancement of photoelectric performance can be attributed to the combined effects of LSPR coupling and the better hole transport property by introducing Au NPs and a graphene oxide-doped layer.

show abstract

Section: Resultsmentioning

confidence: 99%

Plasmonic-Enhanced Organic Light-Emitting Diodes Based on a Graphene Oxide/Au Nanoparticles Composite Hole Injection Layer

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Many efforts have been made to discuss the effects of hole and electron transport materials on the characteristics of OLED devices [13,14,15,16,17,18,19,20]. Jou et al reported that exciton recombination and electric field distribution across the emission layer can be affected by charge transport materials, which play important roles in the luminance and turn-on voltage of devices [14].…”

Section: Introductionmentioning

confidence: 99%

Effects of Charge Transport Materials on Blue Fluorescent Organic Light-Emitting Diodes with a Host-Dopant System

et al. 2019

View full text Add to dashboard Cite

High efficiency blue fluorescent organic light-emitting diodes (OLEDs), based on 1,3-bis(carbazol-9-yl)benzene (mCP) doped with 4,4’-bis(9-ethyl-3-carbazovinylene)-1,1’-biphenyl (BCzVBi), were fabricated using four different hole transport layers (HTLs) and two different electron transport layers (ETLs). Fixing the electron transport material TPBi, four hole transport materials, including 1,1-Bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC), N,N’-Di(1-naphthyl)-N,N’-diphenyl-(1,1’-biphenyl)-4’-diamine(NPB), 4,4’-Bis(N-carbazolyl)-1,1,-biphenyl (CBP) and molybdenum trioxide (MoO3), were selected to be HTLs, and the blue OLED with TAPC HTL exhibited a maximum luminance of 2955 cd/m2 and current efficiency (CE) of 5.75 cd/A at 50 mA/cm2, which are 68% and 62% higher, respectively, than those of the minimum values found in the device with MoO3 HTL. Fixing the hole transport material TAPC, the replacement of TPBi ETL with Bphen ETL can further improve the performance of the device, in which the maximum luminance can reach 3640 cd/m2 at 50 mA/cm2, which is 23% higher than that of the TPBi device. Furthermore, the lifetime of the device is also optimized by the change of ETL. These results indicate that the carrier mobility of transport materials and energy level alignment of different functional layers play important roles in the performance of the blue OLEDs. The findings suggest that selecting well-matched electron and hole transport materials is essential and beneficial for the device engineering of high-efficiency blue OLEDs.

show abstract

“…OLEDs, in which EML is an organic material such as Tris-(8-hydro-xyquinoline)aluminum (Alq 3 ), have attracted intensive interest because of their excellent properties such as low cost, high brightness and flexibility [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. The organic material employed in OLEDs is an organic semiconductor, which contains small organic molecules and organic polymers.…”

Section: Two-dimensional (2d) Materials In Organic Light Emitting Diomentioning

confidence: 99%

“…Although inorganic LEDs based on III-V semiconductors such as GaN and InGaN have made semiconductor solid state lighting popular, accompanied with the significant saving of energy, the high-temperature, expensive vacuum-based manufacturing process employed to fabricate these semiconductors restricts their widespread application. The substitutes of inorganic LEDs contain organic light emitting diodes (OLEDs) [1][2][3][4][5][6][7][8][9][10][11][12][13][14], quantum dot light emitting diodes (QLEDs) [15][16][17] and perovskite light emitting diodes (PeLEDs) [18][19][20][21][22][23][24][25], which take advantage of the high photoluminescence quantum efficiency (PLQE), solution processability, good purity and tunability of color. For these new types of LEDs, high-efficiency and stable devices are still the objectives of research works.…”

Section: Introductionmentioning

confidence: 99%

Improved Charge Injection and Transport of Light-Emitting Diodes Based on Two-Dimensional Materials

et al. 2019

View full text Add to dashboard Cite

Light-emitting diodes (LEDs) are considered to be the most promising energy-saving technology for future lighting and display. Two-dimensional (2D) materials, a class of materials comprised of monolayer or few layers of atoms (or unit cells), have attracted much attention in recent years, due to their unique physical and chemical properties. Here, we summarize the recent advances on the applications of 2D materials for improving the performance of LEDs, including organic light emitting diodes (OLEDs), quantum dot light emitting diodes (QLEDs) and perovskite light emitting diodes (PeLEDs), using organic films, quantum dots and perovskite films as emission layers (EMLs), respectively. Two dimensional materials, including graphene and its derivatives and transition metal dichalcogenides (TMDs), can be employed as interlayers and dopant in composite functional layers for high-efficiency LEDs, suggesting the extensive application in LEDs. The functions of 2D materials used in LEDs include the improved work function, effective electron blocking, suppressed exciton quenching and reduced surface roughness. The potential application of 2D materials in PeLEDs is also presented and analyzed.

show abstract

High-current stressing of organic light-emitting diodes with different electron-transport materials

Cited by 14 publications

References 14 publications

Plasmonic-Enhanced Organic Light-Emitting Diodes Based on a Graphene Oxide/Au Nanoparticles Composite Hole Injection Layer

Plasmonic-Enhanced Organic Light-Emitting Diodes Based on a Graphene Oxide/Au Nanoparticles Composite Hole Injection Layer

Effects of Charge Transport Materials on Blue Fluorescent Organic Light-Emitting Diodes with a Host-Dopant System

Improved Charge Injection and Transport of Light-Emitting Diodes Based on Two-Dimensional Materials

Contact Info

Product

Resources

About