Single-layer organic light-emitting diode with 2.0% external quantum efficiency prepared by spin-coating

Jin, YD; Yang, J.P.; Heremans, Paul; Auweraer, Mark Van der; Rousseau, E.; Geise, H. J.; Borghs, Gustaaf

doi:10.1016/s0009-2614(00)00279-7

Cited by 48 publications

(23 citation statements)

References 16 publications

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“…If effective charge trapping occurs at the rubrene sites leading to excited singlet state formation on the rubrene, 5 then one might well expect an increased device EQE as observed in rubrene-doped Alq 3 devices. 5 Since this does not obviously occur in PF2/6am4-doped devices ͑using very similar concentrations to those used in the Alq 3 devices͒, we can only conclude that such a mechanism in the polymer case is not effective. Thus, we ascribe the decrease in overall EQE of the APFO-doped PLEDs to singlet-triplet annihilation at the rubrene sites mediated by the long-lived trapped triplets on the dopant arising from triplet energy transfer from the PF2/ 6am4.…”

mentioning

confidence: 82%

Effects of singlet and triplet energy transfer to molecular dopants in polymer light-emitting diodes and their usefulness in chromaticity tuning

Higgins

Monkman

Nothofer

et al. 2001

Applied Physics Letters

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Articles you may be interested inEffective ionic charge polarization using typical supporting electrolyte and charge injection phenomena in molecularly doped polymer light-emitting diodes Efficient, white emission with Commission Internationale de L'Eclairage coordinates of 0.33, 0.42 is demonstrated from polymer light-emitting diodes operating at high brightness. An amino endcapped polyfluorene derivative doped with rubrene was used as the active layer, in combination with a poly͑3,4-ethylenedioxythiophene͒ hole transport layer. Luminescence reaches 14950 Cd/m 2 at a current density of 150 mA/cm 2 , and the maximum external quantum efficiency measured 1.05% for a bias voltage of 9.0 V. We observe a fall in external quantum efficiency relative to the undoped device, which we ascribe to an increased singlet-triplet annihilation rate at the dopant sites.

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mentioning

confidence: 82%

Effects of singlet and triplet energy transfer to molecular dopants in polymer light-emitting diodes and their usefulness in chromaticity tuning

Higgins

Monkman

Nothofer

et al. 2001

Applied Physics Letters

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“…The injected carriers accumulate in the vicinity of the cathode/ organic layer interface because of the low mobility, whereas, because of the higher barrier, the holes accumulate at the vicinity of the anode/ organic layer interface. The low electrons barrier and the high holes mobility, reduces the accumulation of both carriers near their respective interfaces, hence improving the CBF and EQE (even if the EQE increase is less than 5 % which is the case for all PPV's based materials [39] - [41]). P 2 has electrons and holes injected from an ohmic contact and contact limited contact respectively with equal mobilities (Fig.3),…”

Section: B Device Efficiencymentioning

confidence: 99%

Electrical and optical numerical modeling of DP-PPV based polymer light emitting diode

Benatia

Telia

2018

J. Microw. Optoelectron. Electromagn. Appl.

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“…However, clear understanding of degradation and efficient improvement of lifetime in OLEDs are still main issues. Recently, mixed single-layer structure, in which electron-transport material, hole-transport materials, host, and dopant are mixed in one layer, is proposed for improving the device performance by optimizing the mixing ratio and doping concentration [13][14][15][16][17][18][19]. Particularly, it is possible to largely improve the device stability by using a mixed single layer as the emission layer.…”

Section: Introductionmentioning

confidence: 99%

Improved Device Lifetime In Organic Light Emitting Devices By Using a Solution-Processed Mixing Single Layer Structure

Geng

Wang

Yang

et al. 2015

J. Photopol. Sci. Technol.

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Device stability in an organic light emitting devices (OLEDs) with a solution-processed mixing sing -NPD), host materials tris-(8-hydroxy-quinoline) aluminum (Alq 3 ), electron transport material 2,5---bipyridyl))-1,1-dimethyl-3,4-diphenylsilole (PyPySPyPy) and dope material 5,6,11,12-tetraphenylnaphthacene (rubrene) was investigated. Maximum power efficiency of 5.6 lm/W was obtained by optimizing the mixing ratio of -NPD: Alq 3 : rubrene:PyPySPyPy = 30:50:1:20. Luminance and power efficiency of mixed single layer device was largely improved compared to tri-layer heterojunction device. Lifetime testing demonstrated that the mixed single layer device exhibited longer operational lifetime of 340 hours, which was three times longer than the 105 hours for tri-layer device. Origin of improved device stability is analyzed by evaluating the current-voltage characteristics, dark sports growth and the polarized optical microscope images of mixed organic films.

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Single-layer organic light-emitting diode with 2.0% external quantum efficiency prepared by spin-coating

Cited by 48 publications

References 16 publications

Effects of singlet and triplet energy transfer to molecular dopants in polymer light-emitting diodes and their usefulness in chromaticity tuning

Effects of singlet and triplet energy transfer to molecular dopants in polymer light-emitting diodes and their usefulness in chromaticity tuning

Electrical and optical numerical modeling of DP-PPV based polymer light emitting diode

Improved Device Lifetime In Organic Light Emitting Devices By Using a Solution-Processed Mixing Single Layer Structure

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