High efficiency rubrene based inverted top-emission organic light emitting devices with a mixed single layer

Wang, Zhao-Kui; Lou, Yanhui; Naka, Shigeki; Okada, Hiroyuki

doi:10.1016/j.jlumin.2010.02.021

Cited by 21 publications

(13 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Electron injection material tris-(8-hydroxy-quinoline) aluminum (Alq 3 ) and 2,5-bis(6 0 -(2 0 ,2 00 -bipyridyl))-1,1-dimethyl-3,4-diphenylsilole (PyPySPyPy), hole transport material 4, [19]. Hole dominated devices having the structure of Au (30 nm)/MoO 3 (20 nm)/MOL (150 nm)/MoO 3 (20 nm)/Au (30 nm) and electron dominated devices having the structure of Al (alloys) (30 nm)/ MOL (150 nm)/Al (alloys) were fabricated by thermal evaporation at a base pressure of 4 Â 10 À6 Torr.…”

Section: Methodsmentioning

confidence: 99%

Temperature dependence of carrier injection in small molecular organic light emitting device with a mixed single layer

Wang

Lou

Naka

et al. 2010

Chemical Physics Letters

Self Cite

View full text Add to dashboard Cite

Section: Methodsmentioning

confidence: 99%

Temperature dependence of carrier injection in small molecular organic light emitting device with a mixed single layer

Wang

Lou

Naka

et al. 2010

Chemical Physics Letters

Self Cite

View full text Add to dashboard Cite

“…TOLEDs have superior properties such as wide color gamut and high efficiency compared with the bottom-emission OLEDs (BOLEDs). [5][6][7][8][9][10][11][12] OLED needs an encapsulation with a water vapor transmission rate (WVTR) of 10 À6 g m À2 day À1 for long lifetime. Flexible OLEDs (FOLEDs) using flexible substrates, flexible electrodes, and flexible thin-film encapsulation (TFE) are reported.…”

Section: Introductionmentioning

confidence: 99%

“…TOLEDs have superior properties such as wide color gamut and high efficiency compared with the bottom‐emission OLEDs (BOLEDs). [ 5–12 ]…”

Section: Introductionmentioning

confidence: 99%

Highly Robust, Flexible Top‐Emission Organic Light‐Emitting Diode Exhibiting Stable Performance under Infolding of Curvature Radius of 0.32 mm

Jeong

Kim

et al. 2021

Adv Eng Mater

View full text Add to dashboard Cite

Flexible top‐emission organic light‐emitting diodes (TOLEDs) with a thin‐film encapsulation (TFE) are of increasing attention to improve the flexibility of foldable smartphone organic light‐emitting diode (OLED) displays. There are inevitable issues to achieve foldable display with smaller folding radius for the future portable display. Herein, the device flexibility is investigated with infolding and outfolding tests with the curvature radius from 2.5 to 0.32 mm. Parylene (1 μm)/silicon nitride (SiNx) (X nm)/parylene (1 μm)/SiNx (X nm) (X = 100, 70, 50, and 30 nm) of TFEs are applied on the TOLEDs. It is found that stable device performances can be achieved at the curvature radius of 0.32 mm after 100 000 cycles infolding testing when the SiNx thickness is 30 nm. The device has significant degradation upon outfolding of 5000 cycles at the same radius of 0.32 mm. Note that, the water vapor transmission rate (WVTR) of the TFT with 30 nm SiNx is higher than the TFE with thicker SiNx (e.g., 50 nm). The flexibility and WVTR can be much improved using four‐stacked TFE with 30 nm SiNx for foldable active‐matrix OLED displays.

show abstract

“…In the past decade, new light-emitting layer (EML) structures for organic light emitting diode (OLED) were tested for improving the power efficiency and device lifetime [1][2][3][4][5][6][7][8][9][10]. These EML structures are broadly categorized as the uniformly mixed (UM) layer, step-wise graded mixed (SGM) layer and the continuously graded mixed (CGM) layer.…”

Section: Introductionmentioning

confidence: 99%

“…In comparison, the SGM layer consisted of a stack of thinner CGM-layers. It was reported that the electric field in UM-OLED became constant and joule heating was reduced, hence the device lifetime was increased [1,2]. For the CGM layer, since the HJ interface was removed, the electrons and holes were gradually slowed down in EML owing to increased hopping distance [4].…”

Section: Introductionmentioning

confidence: 99%

Recombination Zone by Mixed-Source Evaporation in Organic Light Emitting Diodes with Graded Mixed-Layer Structures

Kee

Siew

Yap

et al. 2014

Proceedings of the 12th Asia Pacific Physics Conference (APPC12)

View full text Add to dashboard Cite

Thermal evaporation of a mixed-source of electron and hole-transport materials at appropriate heating rates, namely, tris-(8-hydroxyquinoline)aluminum(3) (Alq 3) and N,N-diphenyl-N, N-bis(3-methylphenyl)-1, 1-diphenyl-4,4-diamine (TPD) can produce a continuously graded mixed-layer structure (CGM). This enables CGM-OLEDs to be fabricated on ITO-coated glass. Although I-V characteristic of CGM-OLEDs may not be significantly modified by a single mixed layer, as compared to the conventional bi-layer heterojunction (HJ) OLED, the power efficiency from the CGM-OLEDs can be increased by a factor of 3.3. The improvement in CGM-OLEDs can be largely explained by the broadening of its recombination zone. The spatial distributions of Alq 3 and TPD in CGM-layers are obtained by depth-profiling of X-ray Photoelectron Spectroscopy. The optimum layer structure for CGM-OLEDs is discussed qualitatively in term of charge balance and electrode quenching.

show abstract

High efficiency rubrene based inverted top-emission organic light emitting devices with a mixed single layer

Cited by 21 publications

References 21 publications

Temperature dependence of carrier injection in small molecular organic light emitting device with a mixed single layer

Temperature dependence of carrier injection in small molecular organic light emitting device with a mixed single layer

Highly Robust, Flexible Top‐Emission Organic Light‐Emitting Diode Exhibiting Stable Performance under Infolding of Curvature Radius of 0.32 mm

Recombination Zone by Mixed-Source Evaporation in Organic Light Emitting Diodes with Graded Mixed-Layer Structures

Contact Info

Product

Resources

About