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. 2017 Mar 21;7:284. doi: 10.1038/s41598-017-00368-5

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© The Author(s) 2017

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Energy level diagram of the materials for devices and their performance in OLEDs. (a) Energy level diagrams of the materials used in the devices. (b) η _EQE-L characteristics and photos of CCX-II-6B and CCX-II-6B-OC.