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OLEDs triplet emitters

This was one of the first blue OLED triplet -emitters. However, its long term stability is limited which has led to a search for more stable phosphors for this spectral region. [Pg.199]

Yersin H (2004) Triplet Emitters for OLED Applications. Mechanisms of Exciton Trapping and Control of Emission Properties. 241 1-6 Yeung LK,see Crooks RM (2001) 212 81-135... [Pg.270]

Triplet Emitters for OLED Applications and the Role of Spin-Orbit Coupling A Study Based on High-Resolution Optical Spectroscopy... [Pg.193]

Keywords Emission quantum yields High-resolution spectroscopy Iridium complexes OLED emitters Organometallic compounds Phosphorescence Photophysics Platinum complexes Radiative rates Spin-orbit coupling Triplet emitters Zero-field splitting SOC ZFS SOC and geometry SOC paths... [Pg.193]

Spin-orbit coupling not only governs the amount and pattern of ZFS of the emitting triplet state, but it is also of dominant importance for the radiative emission decay rates and thus for the photoluminescence quantum yields. These properties are crucial for the suitability of triplet emitters in OLEDs. In conclusion, detailed spectroscopic studies of compounds triplet state properties in combination with... [Pg.230]

Figure 4.47. Illustration of triplet harvesting. In the absence of a triplet emitter, the triplet excitation energy is converted to heat, losing 75% of the quantum efficiency. Also shown are a variety of organometallic complexes, and their relative spin-orbit coupling values - directly proportional to their use in phosphorescent OLEDs. Reproduced with permission from Yersin, H. Top. Curr. Chem. 2004, 241, 1. Copyright 2004 Springer Science and Business Media. Figure 4.47. Illustration of triplet harvesting. In the absence of a triplet emitter, the triplet excitation energy is converted to heat, losing 75% of the quantum efficiency. Also shown are a variety of organometallic complexes, and their relative spin-orbit coupling values - directly proportional to their use in phosphorescent OLEDs. Reproduced with permission from Yersin, H. Top. Curr. Chem. 2004, 241, 1. Copyright 2004 Springer Science and Business Media.
Yersin, H. (2004)Triplet emitters for OLED apphcations mechanisms of exciton trapping and control of emission properties. Topics in Current Chemistry, 24, 1—26. [Pg.468]

Keywords Triplet emitters OLED Organic/organometallic light emitting diode Exciton trapping Emission properties Electroluminescence Electrophosphorescence ... [Pg.2]

In the scope of this chapter, organometallic triplet emitters are of particular interest due to their promising use in electro-luminescent devices such as OLEDs (organic/organometallic light emitting diodes). (See for example [11-16].) In Sect. 2, the construction and working principle of an OLED is... [Pg.2]

Triplet Emitters for OLED Applications. Mechanisms of Exciton Trapping... [Pg.3]

Fig. 1 Basic set-up of a layered OLED structure. Electrons and holes are injected from the respective electrodes (metal cathode, semiconducting and transparent anode). The charge carriers move from different sides into the recombination/emitter layer, where electrons and holes recombine and excite the doped emitter molecules (asterisks, e.g., or-ganometallic triplet emitters). For more details see Fig. 2. For clarity, light emission is only shown for one direction although the photons are emitted in all directions... Fig. 1 Basic set-up of a layered OLED structure. Electrons and holes are injected from the respective electrodes (metal cathode, semiconducting and transparent anode). The charge carriers move from different sides into the recombination/emitter layer, where electrons and holes recombine and excite the doped emitter molecules (asterisks, e.g., or-ganometallic triplet emitters). For more details see Fig. 2. For clarity, light emission is only shown for one direction although the photons are emitted in all directions...
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See also in sourсe #XX -- [ Pg.149 ]

See also in sourсe #XX -- [ Pg.149 ]



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Emittance

Emitters

OLEDs

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