| http://www.w3.org/ns/prov#value | - Thus, as far as equal recombination efficiency of the carrier can be attained without using a laminate structure, by using a bipolar material or the like, actually lower drive voltage is attained with the single layer structure having fewer interfaces. [0028] There is a method of inserting a material for relaxing the energy barrier in an interface with, for example, an electrode to thereby improve
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