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A novel bipolar host tris(4-(pyrimidin-5-yl)phenyl)amine (TPMTPA) constructed by incorporating triphenylamine as the electron-donating core and pyrimidine as the electron-accepting peripheries was designed and synthesized. TPMTPA achieves excellent bipolar charge transport properties and has high enough triplet energy level to sensitize green, yellow, orange, red and deep-red phosphors. By using TPMTPA...
Polymorphs of vanadyl-phthalocyanine (VOPc) films were realized on the polymer-modified substrates. Balanced ambipolar transport was observed in the Phase II of VOPc film on the PMMA modified substrate, while only electron transport was obtained on PVA layer. The different transport behavior is believed to be original from their crystalline structures, which may lead to their different energy-band...
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