2020
DOI: 10.1002/adem.201900897
|View full text |Cite
|
Sign up to set email alerts
|

Low‐Refractive Index Layers in Organic Light‐Emitting Diodes via Electrospray Deposition for Enhanced Outcoupling Efficiencies

Abstract: Organic light-emitting diodes (OLEDs) still suffer from limited outcoupling efficiencies. Herein, a novel technology for the enhancement of the outcoupling efficiency of OLED devices is presented. By means of electrospray deposition (ESD), the active hole-transport layer (HTL) is modified to have a reduced effective refractive index due to its porosity. A green-emitting stack is tailored to demonstrate this effect, whereas additional haze effects are to be prevented. The introduction of a low-index HTL results… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

0
5
0

Year Published

2020
2020
2024
2024

Publication Types

Select...
8

Relationship

0
8

Authors

Journals

citations
Cited by 9 publications
(5 citation statements)
references
References 51 publications
0
5
0
Order By: Relevance
“…In addition to adopting light extraction techniques, such as microlens arrays (18,19), scattering layers (20,21), and corrugated structures (22,23), raising horizontal dipole ratio ( // ) is a feasible molecular engineering approach to reduce optical loss and enhance  out . Elongating molecular conjugation along the direction of transition dipole moment (24)(25)(26)(27) and expanding molecular plane where the transition dipole moment lies (2,(28)(29)(30) are two major molecule design strategies in the literatures, but often at the cost of sacrificing emission color and efficiency of TADF emitters because of varied internal D-A interaction strength or strong intermolecular interactions in the aggregated state.…”
Section: Introductionmentioning
confidence: 99%
“…In addition to adopting light extraction techniques, such as microlens arrays (18,19), scattering layers (20,21), and corrugated structures (22,23), raising horizontal dipole ratio ( // ) is a feasible molecular engineering approach to reduce optical loss and enhance  out . Elongating molecular conjugation along the direction of transition dipole moment (24)(25)(26)(27) and expanding molecular plane where the transition dipole moment lies (2,(28)(29)(30) are two major molecule design strategies in the literatures, but often at the cost of sacrificing emission color and efficiency of TADF emitters because of varied internal D-A interaction strength or strong intermolecular interactions in the aggregated state.…”
Section: Introductionmentioning
confidence: 99%
“…The decrease in refractive index can be helpful in the development of light-emitting diodes (LEDs) and other optoelectronic devices, where it can improve the overall efficiency and performance of the devices. 28,29 ZnO NPs are used as waveguides, 30 so it is essential to understand the dispersion parameters in order to determine the strength of the optical transition interaction in the inter-band. The single oscillator model proposed by the Wemple-DiDomenico (WDD) is used to investigate the dispersion parameters of the refractive index for the ZnO/MWCNTs nanocomposite, in the normal dispersion region: 31…”
Section: Resultsmentioning
confidence: 99%
“…The reduction in refractive index can benefit the advancement of optoelectronic devices such as LEDs, by improving their overall efficiency and performance. 48,49 Using Sellmeier's model and examining the refractive index spectra, it is possible to calculate the mean oscillator wavelength (λ 0 ) and oscillator strength (S 0 ) of the nanocomposites using the following equation 50 :…”
Section: Refractive Index Studymentioning
confidence: 99%