White organic light-emitting diodes with an ultra-thin premixed emitting layer

Jeon, Taemin; Geffroy, Bernard; Tondelier, Denis; Bonnassieux, Yvan; Forget, Sébastien; Chénais, Sébastien; Ishow, Eléna

doi:10.1016/j.tsf.2013.06.054

Cited by 10 publications

(6 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The UPL consisted of two molecules with similar structures and melting temperatures, the red emission of 4-di(4 ′tert-butylbiphenyl-4-yl)aminobiphenyl-4 ′ -yl)acrylonitrile (fvin) and the green emission of 4-di(4 ′ -tert-butylbiphenyl-4-yl)aminobenzaldehyde (fcho), which mixed in one evaporation boat to produce a film with the same and reproducible composition as the premixture. By evaporating this blend in a 1 nm thick layer in the hole transport layer (HTL) α-NPB of a standard fluorescent OLED structure, combined with the blue emission from the heterojunction, white light with the Commission Internationale de l'Eclairage (CIE) of (0.34, 0.34) and color rendering index (CRI) of 72 was obtained with good color stability under injected current [41].…”

Section: Fluorescent Doping Woleds With Uemlsmentioning

confidence: 99%

Progress in Research on White Organic Light-Emitting Diodes Based on Ultrathin Emitting Layers

Zhao,

Hu,

Kong

et al. 2024

Micromachines

View full text Add to dashboard Cite

White organic light-emitting diodes (WOLEDs) hold vast prospects in the fields of next-generation displays and solid-state lighting. Ultrathin emitting layers (UEMLs) have become a research hotspot because of their unique advantage. On the basis of simplifying the device structure and preparation process, they can achieve electroluminescent performance comparable to that of doped devices. In this review, we first discuss the working principles and advantages of WOLEDs based on UEML architecture, which can achieve low cost and more flexibility by simplifying the device structure and preparation process. Subsequently, the successful applications of doping and non-doping technologies in fluorescent, phosphorescent, and hybrid WOLEDs combined with UEMLs are discussed, and the operation mechanisms of these WOLEDs are emphasized briefly. We firmly believe that this article will bring new hope for the development of UEML-based WOLEDs in the future.

show abstract

Section: Fluorescent Doping Woleds With Uemlsmentioning

confidence: 99%

Progress in Research on White Organic Light-Emitting Diodes Based on Ultrathin Emitting Layers

Zhao,

Hu,

Kong

et al. 2024

Micromachines

View full text Add to dashboard Cite

show abstract

“…By properly thickening the yellow up to 1 nm, the CE of 79.0 cd/A and PE of 40.5 Lm/W were achieved. On the other hand, Jeon et al combined the design concept of UENs and pre-mixing to develop WOLEDs based on pre-mixed UENs, and the color could be changed by adjusting the position of the UEN insertion and the pre-mixed composition [93]. Finally, white light of CIE (0.34, 0.34) and good color stability were achieved.…”

Section: Uen-based Woledsmentioning

confidence: 99%

Organic Light-Emitting Diodes with Ultrathin Emitting Nanolayers

et al. 2023

View full text Add to dashboard Cite

Organic light-emitting diodes (OLEDs) are promising for displays and lighting technologies because of their excellent advantages, such as high efficiency, high luminance, low power consumption, light weight, and flexibility. In recent years, ultrathin emitting nanolayers (UENs) have been used to develop OLEDs without the doping technique, which can simplify device structure, reduce material loss, achieve good exciton utilization, and realize comparable performance to doped devices such as the external quantum efficiency of 28.16%, current efficiency of 63.84 cd/A, and power efficiency of 76.70 Lm/W for white OLEDs. In this review, we comprehensively summarize the recent progress in the field of UEN-based OLEDs. Firstly, the host–guest-doped OLEDs and doping-free UEN-based OLEDs are compared. Then, various effective approaches for designing UEN-based OLEDs are presented, including both monochromatic and white devices. In particular, the properties of materials, the design of device structures, and the main working mechanisms of UEN-based OLEDs are highlighted. Finally, an outlook on the future development of UEN-based OLEDs is provided.

show abstract

“…The quality and the quantum efficiency of the WLE materials are the predominant governing factors to transfer them from the laboratory to the marketplace. Considering the concept of additive mixing, enormous attention has been paid by different research groups on the fabrication of WLE materials employing organic, inorganic, and organic–inorganic hybrid scaffolds . We restrict our discussion to the recent development of all‐organic WLE materials .…”

Section: Introductionmentioning

confidence: 99%

Molecular Engineering Approaches Towards All‐Organic White Light Emitting Materials

Kundu

Pallavi

et al. 2020

Chemistry A European J

107

View full text Add to dashboard Cite

White light emitting (WLE) materials are of increasing interesto wing to their promising applicationsi na rtificial lighting, display devices, molecular sensors, and switches.I n this context,o rganic WLE materials cater to the interesto f the scientific community owing to their promising features like color purity,l ong-term stability,s olutionp rocessability, cost-effectiveness,a nd low toxicity.T he typical methodf or the generation of white light is to combine three primary (red, green, and blue) or the two complementary (e.g., yellow and blue or red and cyan) emissive units covering the whole visible spectralw indow (400-800 nm). The judicious choice of molecular buildingb locks and connecting them through either strong covalentb onds or assembling through weakn oncovalent interactions are the key to achieve enhanced emissions panning the entire visible region.In the present review article, moleculare ngineering approaches for the development of all-organic WLE materials are analyzed in view of different photophysical processes like fluorescencer esonance energy transfer (FRET), excitedstate intramolecular protont ransfer (ESIPT), charget ransfer (CT), monomer-excimer emission, triplet-state harvesting, etc. The key aspect of tuning the molecular fluorescence under the influence of pH, heat, and host-guest interactions is also discussed. The white light emission obtained from small organic molecules to supramolecular assemblies is presented,i ncluding polymers, micelles,a nd also employing covalent organic frameworks. The state-of-the-art knowledge in the field of organic WLE materials, challenges, and future scope are delineated.

show abstract

White organic light-emitting diodes with an ultra-thin premixed emitting layer

Abstract: ABSTRACT:We described an approach to achieve fine color control of fluorescent White Organic Light Emitting Diodes (OLED), based on an Ultra-thin Premixed emitting Layer (UPL). The UPL consists of a mixture of two dyes (red-emitting 4-di(4'-tert-butylbiphenyl-4-yl)amino-4'-

Cited by 10 publications

References 26 publications

Progress in Research on White Organic Light-Emitting Diodes Based on Ultrathin Emitting Layers

Progress in Research on White Organic Light-Emitting Diodes Based on Ultrathin Emitting Layers

Organic Light-Emitting Diodes with Ultrathin Emitting Nanolayers

Molecular Engineering Approaches Towards All‐Organic White Light Emitting Materials

Contact Info

Product

Resources

About