منابع مشابه
Novel host materials for blue phosphorescent OLEDs
We present two classes of host materials for blue phosphors. The first are carbazole substituted biphenyls 1-9. In these CBP-type materials the triplets are confined to one half of the molecules by using either twisted biphenyls or by a metalinkage of the carbazoles to the biphenyl. We obtained high triplet energies of 2.95-2.98 eV and high glass transition temperatures in the range of 100-120 ...
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[reaction: see text] A series of carbazole/fluorene (CBZm-Fn) hybrids were effectively synthesized through Friedel-Crafts-type substitution of the carbazole rings. These compounds were thermally and morphologically stable host materials for OLED applications. Efficient blue phosphorescent OLEDs were obtained when employing CBZ1-F2 as the host and FIrpic as the guest.
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Combining a sterically bulky, electron-deficient 2-(2,4-difluorophenyl)-4-(2,4,6-trimethylphenyl)pyridine (dFMesppy) cyclometalating C4N ligand with an electron rich, highly rigidified 1,10-(a,a0-o-xylylene)-2,20biimidazole (o-xylbiim) N4N ligand gives an iridium complex, [Ir(dFMesppy)2(o-xylbiim)](PF6), that achieves extraordinarily bright blue emission (FPL = 90%; lmax = 459 nm in MeCN) for a...
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Organic light emitting diodes (OLEDs) based display technologies are getting more and more important for smartphones, laptops and televisions. OLED devices consist of thin organic layer stacks between two electrodes. Located around an emission layer, where the radiative recombination of electrons and holes takes place, are layers for the transport and blocking of charge carriers. Thickness, com...
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Some individuals have very specific and differentiated emotional experiences, such as anger, shame, excitement, and happiness, whereas others have more general affective experiences of pleasure or discomfort that are not as highly differentiated. Considering that individuals with major depressive disorder (MDD) have cognitive deficits for negative information, we predicted that people with MDD ...
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ژورنال
عنوان ژورنال: Materials Today
سال: 2011
ISSN: 1369-7021
DOI: 10.1016/s1369-7021(11)70211-5