Abstract: An organic light-emitting device includes, in the following order, a first electrode, a first light-emitting layer, a charge generation layer, a second light-emitting layer, and a second electrode. The first light-emitting layer contains a first light-emitting material. The second light-emitting layer contains a second light-emitting material. Each of the first light-emitting material and the second light-emitting material emits light of a first color. The first light-emitting material and the second light-emitting material are different.

Abstract: Provided is a hybridization substrate in which DNA strands having a double-strand portion and a single-strand portion are immobilized on a substrate surface, wherein the double-strand portion side of said DNA strands is immobilized on said substrate surface. The invention relates to a method in which target DNA is contacted with the surface of the above substrates on which DNA strands have been immobilized to test for complementarity between the target DNA and the single-strand portion of said DNA strands having a double-strand portion and a single-strand portion.