Blue thermally activated delayed fluorescent devices using triazine acceptor based emitters with high rate constant of reverse intersystem crossing

Ho Suk Kang; Soon Ok Jeon; Yeon Sook Chung; Myungsun Sim; Jongsoo Kim; Joonghyuk Kim; Hasup Lee; Soo Ghang Ihn; Sunghan Kim

doi:10.1117/12.2566656

20 August 2020 Blue thermally activated delayed fluorescent devices using triazine acceptor based emitters with high rate constant of reverse intersystem crossing

Ho Suk Kang, Soon Ok Jeon, Yeon Sook Chung, Myungsun Sim, Jongsoo Kim, Joonghyuk Kim, Hasup Lee, Soo Ghang Ihn, Sunghan Kim

Author Affiliations +

Proceedings Volume 11473, Organic and Hybrid Light Emitting Materials and Devices XXIV; 1147306 (2020) https://doi.org/10.1117/12.2566656
Event: SPIE Organic Photonics + Electronics, 2020, Online Only

Abstract

Recently all-organic thermally activated delayed fluorescent (TADF) emitters have attracted great attention. In TADF emitters, nonemissive triplet states can be also harvested via population of emissive singlet states through reverse intersystem crossing (RISC). The RISC can be induced by the small energy gap between the lowest singlet (S1) and triplet (T1) states. Due to this ability of TADF, 100% internal quantum efficiency and high maximum external quantum efficiency (EQEmax) comparable to those of phosphorescent organic light emitting diodes (OLEDs) have been already reported in TADF OLEDs. In this study, we demonstrate high efficiency TADF OLEDs which are attributed to employing triazine acceptor type TADF compounds having high RISC rates(kRISC).

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Citation Download Citation

Ho Suk Kang, Soon Ok Jeon, Yeon Sook Chung, Myungsun Sim, Jongsoo Kim, Joonghyuk Kim, Hasup Lee, Soo Ghang Ihn, and Sunghan Kim "Blue thermally activated delayed fluorescent devices using triazine acceptor based emitters with high rate constant of reverse intersystem crossing", Proc. SPIE 11473, Organic and Hybrid Light Emitting Materials and Devices XXIV, 1147306 (20 August 2020); https://doi.org/10.1117/12.2566656

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