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US07592075B2 Organic electroluminescence element 有权
有机电致发光元件

Organic electroluminescence element
摘要:
An organic electroluminescence element is disclosed which comprises a hole transporting layer containing a hole transporting material, a light emission layer containing a host compound and a phosphorescent compound, a hole blocking layer, and an electron transporting layer, the host compound having a band gap of from 3.3 eV to 5 eV, and having a molecular weight of not less than 500, and relationship c
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