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. 2018 Aug 6;9:3111. doi: 10.1038/s41467-018-05527-4

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Photophysical properties of CN-Cz2, PO-T2T, and the exciplex CN-Cz2:PO-T2T (1:1). a Chemical structures of CN-Cz2 and PO-T2T. b Highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) of CN-Cz2 according to DFT calculations at the B3LYP/6-31G(d) level. c Normalized photoluminescence (PL) and absorption spectra of CN-Cz2, PO-T2T as well as their blend film in the ratio 1:1. d Transient PL decay properties of CN-Cz2:PO-T2T (1:1) blend film at 300 K. The performance of OLEDs using CN-Cz2:PO-T2T (1:1) blend film as the emitter. e J–V–L characteristics. f EQE–PE–L characteristics. g EL spectrum of the CN-Cz2:PO-T2T (1:1) exciplex-based OLED. h A prototype demonstration of CN-Cz2:PO-T2T (1:1) exciplex OLED lighting device