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【答案】应助回帖
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书剑如风: 金币+50, 翻译EPI+1 2015-04-26 08:12:51
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The rare earth complexes is made up of the central ions and ligands. while the rare earth ions mates the neutral ligand with strong coordination ability and suitable level of triplet ,It not only contributes to improving the photoluminescence and electroluminescence performance， but also the fluorescence emission intensity, volatility and stability of the lanthanide complexes. According to reports,at currently,one of the biggest barriers of Europium complexes' application to electroluminescent emission materials is cused by Relatively low carrier mobility( especially the electron mobility).Just equal to 0.01-0.1% of the traditional LED inorganic material. an effective way to solve this problem is to introduce a suitable neutral ligand to the complexes. as to neutral ligand,we can increase the rigidity of the molecule to reduce energy dissipation and to improve the photoluminescence quantum yields of ligand complexes. In addtion, OLED rare earth luminescent materials containing rigid ligands can also reduce the accumulation and interaction of molecules and thus can reduce the concentration quenching and "TT" extinguishment then improve the external quantum efficiency of the device. |
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