prov:value
| - zole, imidazole, tetrahydroimidazole, oxazole, and stilbene. [0151] Examples of materials for the electron transport layer 62 include fluorenone, anthraquinodimethane, diphenyquinone, thiopyrandioxide, oxadiazole, thiadiazole, tetrazole, and perylene tetracarboxylic acids. [0152] Examples of materials for the cathode 61 include metals such as aluminum (Al), magnesium (Mg), and silver (Ag).
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