| http://www.w3.org/ns/prov#value | - As the organic compound having an electron-transporting property, the following material such as a metal complex having a quinoline skeleton or a benzoquinoline skeleton, or the like can be used: tris(8-quinolinolato)aluminum (abbreviation: to Alq3), tris(4-methyl-8-quinolinolato)aluminum (abbreviation: Alq3), bis(10-hydroxybenzo[h]-quinolinato)beryllium (abbreviation: BeBq2), or bis(2-methyl-8-qu
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