| http://www.w3.org/ns/prov#value | - The weight percent of the polyphenyl ether in the charge transport layer or layers is, for example, from about 0.1 to about 30, or from about 5to about 20.In place of the C-ethers and other ethers illustrated herein there can be selected polyphenyl thioethers of the following formula/structure, such as those with n+1 benzene rings linked by thioether bonds,##STR00015## wherein n is a suitable numb
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