| http://www.w3.org/ns/prov#value | - If the organic light emitting unit 230 is formed using the low molecular weight organic film, a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), an Emission Layer (EML), an Electron Transport Layer (ETL), an Electron Injection Layer (EIL) may be stacked in a single structure or a composite structure, and organic materials may be used including copper phthalocyanine (CuPc), N,N???-Di(napht
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