Degradation of polymer-based light-emitting diodes during operation

Ettedgui, E.; Davis, G. T.; Hu, Bin; Karasz, Frank E.

doi:10.1016/s0379-6779(97)81229-5

Cited by 24 publications

(24 citation statements)

References 18 publications

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“…In this case spectroscopic methods such as scanning tunneling microscopy (STM) [12], transmission electron microscopy (TEM) [13], scanning electron microscopy (SEM) [14] and atomic force microscopy (ATM) [15] are used. Causes for device failures due to crystallization and inter diffusion of organic layers were reported by Adachi et al [16] and Han et al [17].…”

Section: Introductionmentioning

confidence: 99%

Investigation of FIrpic in PhOLEDs via LC/MS technique

et al. 2009

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Abstract:The commercial breakthrough of phosphorescent organic white light sources is presently hampered due to the unavailability of a stable blue phosphorescent emitter material. Moreover, only few analytical investigations have been made regarding the chemical degradation of the phosphorescent emitter materials during the processing or the operation of the devices. Organic light emitting devices (OLEDs) containing phosphorescent metal complexes with iridium as central ion were investigated. Special attention was paid to the chemical degradation of the material. The devices were analyzed by means of high performance liquid chromatography coupled with mass spectrometry (HPLC/MS). Electron spray ionization (ESI) was employed as ionization source. Isomerization phenomena of the blue-green emitting heteroleptic iridium complex FIrpic could be observed after the device manufacture and after operation. These findings could give hints on the mechanisms that influence the lifetime of PhOLEDs based on FIrpic or similar blue emitters.© Versita Warsaw and Springer-Verlag Berlin Heidelberg.

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Section: Introductionmentioning

confidence: 99%

Investigation of FIrpic in PhOLEDs via LC/MS technique

et al. 2009

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“…This kind of behavior has previously been identied as one important material property for the improvement of OLED lifetimes. 24,[33][34][35] Therefore, the results obtained will be valuable for the development of future dihydroindeno [1,2-b]uorene-based materials and may be transferable to related structures and applications.…”

Section: Discussionmentioning

confidence: 99%

Molecular packing and morphological stability of dihydro-indeno[1,2-b]fluorenes in the context of their substitution pattern

Hempe

Reggelin

2017

RSC Adv.

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“…The first is that under light irradiation, the electro-optical properties of the P3OT are much more affected that the morphology. It is commonly accepted that the breakdown of polymer-based photodevices is correlated with nanomorphology changes since after irradiation a sample topology change is usually found and different features such as pitches, agglomerates, wires, or phase segregation appear when the polymer is blended [36,37]. However, for the irradiation exposures used in the present study, the polymer is already degraded from an electro-optical point of view, and therefore it becomes useless for optoelectronic applications, before substantial changes in the morphology are visible even if an etching of 4 nm is found (total thickness 100 nm).…”

Section: Discussionmentioning

confidence: 99%