Amplified Spontaneous Emission of Cross-linkable Conjugated Polymers

Wallikewitz, Bodo H.; Rosa, Matthias de la; Falcou, A.; Becker, Heinrich; Hertel, Dirk; Meerholz, Klaus

doi:10.1364/fio.2005.stua2

Cited by 2 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further details about device and optimization of the cladding layers will be described elsewhere. 45 We achieved a low ASE threshold of the XG6(25) in the multilayer OLED (I th = 9 μJ/cm 2 , Figure 4), that is, comparable to the threshold of a XG6(25) single-layer on glass (I th = 7 μJ/cm 2 , Table 2). The ASE spectrum exhibiting the maximum at 543 nm is shown in Figure 1.…”

Section: Ase In a Thick Layer Oled Devicementioning

confidence: 59%

Cross-Linkable Polyspirobifluorenes: A Material Class Featuring Good OLED Performance and Low Amplified Spontaneous Emission Thresholds

2009

Self Cite

View full text Add to dashboard Cite

We report on an in-depth study of cross-linkable polyspirobifluorene (PSF) copolymers for organic lasing applications. We investigate the performance of the materials in organic light-emitting diodes (OLED) and the optically pumped amplified spontaneous emission (ASE) properties of the new PSF-based devices. The influence of chemical composition and cross-linking of the copolymers is investigated. The cross-linkable polymers presented here exhibit low ASE thresholds and simultaneously good OLED efficiencies. This is exceptional, as we demonstrate that usually only one of these properties is optimized in semiconducting polymers. The ASE threshold in the greenemitting materials is as low as 4.4 μJ/cm 2 under nanosecond excitation. The chemical cross-linking of the polymers into an insoluble network has little effect on the ASE properties. With the material exhibiting the best figure-of-merit we fabricated a slab-waveguide OLED. This OLED exhibits a low, almost preserved ASE threshold compared to a single layer on glass and concomitantly good luminescence efficiency. Overall, the use of these materials in future organic laser diodes seems promising.

show abstract

Section: Ase In a Thick Layer Oled Devicementioning

confidence: 59%

Cross-Linkable Polyspirobifluorenes: A Material Class Featuring Good OLED Performance and Low Amplified Spontaneous Emission Thresholds

2009

Self Cite

View full text Add to dashboard Cite

show abstract

“…Meerholz et al generated a lasing light emitting diode 217 but also organic light-emitting diode microdisplays with subpixel patterning. 218 Solution-processed top-emitting OLEDs, compatible with TFT and CMOS substrates are applicable in full-color microdisplays with tunable and controllable color-coordinates, when using oxetane-substituted cross-linkable conjugated polymers.…”

Section: Chemical Reviewsmentioning

confidence: 99%

Immobilization Strategies for Organic Semiconducting Conjugated Polymers

et al. 2018

View full text Add to dashboard Cite

This Review details synthetic routes toward and properties of insoluble polymeric organic semiconductors obtained through desolubilization strategies. Typical applications include fixation of donor-acceptor bulk-heterojunction morphologies in organic photovoltaic cells, cross-linking of charge transport materials and active emitters in light emitting diodes or similar devices, and immobilization of morphologies in field effect transistors. A second important application is the structuring of organic semiconductors, using them as photoresists. After desolubilization, removal of the nonirradiated resist leads to elevated, micron-sized features of the semiconductor. In this Review, different strategies for desolubilization are covered. By photochemical or thermal cleavage of solubility-mediating groups such as esters, sulfonium salts, amides, ethers, and acetals or by retro-Diels-Alder reactions, volatile elimination products and the insoluble semiconductor are formed. In another case, desolubilization is achieved by cross-linking via functional groups present in the polymer side chains including vinyl, halide, silicone, boronic acid, and azide functionalities, which polymerize thermally or photochemically. Alternatively, small molecular additives such as photoacids, oligothiols, or oligoazides result in network formation in combination with compatible functional groups present in the immobilizable polymers. Advantages and disadvantages of the respective methods are discussed.

show abstract

Amplified Spontaneous Emission of Cross-linkable Conjugated Polymers

Cited by 2 publications

References 7 publications

Cross-Linkable Polyspirobifluorenes: A Material Class Featuring Good OLED Performance and Low Amplified Spontaneous Emission Thresholds

Cross-Linkable Polyspirobifluorenes: A Material Class Featuring Good OLED Performance and Low Amplified Spontaneous Emission Thresholds

Immobilization Strategies for Organic Semiconducting Conjugated Polymers

Contact Info

Product

Resources

About