An Alternative Host Material for Long‐Lifespan Blue Organic Light‐Emitting Diodes Using Thermally Activated Delayed Fluorescence

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An Alternative Host Material for Long‐Lifespan Blue Organic Light‐Emitting Diodes Using Thermally Activated Delayed Fluorescence

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Title: An Alternative Host Material for Long‐Lifespan Blue Organic Light‐Emitting Diodes Using Thermally Activated Delayed Fluorescence
Author: Ihn, Soo‐Ghang; Lee, Namheon; Jeon, Soon Ok; Sim, Myungsun; Kang, Hosuk; Jung, Yongsik; Huh, Dal Ho; Son, Young Mok; Lee, Sae Youn; Numata, Masaki; Miyazaki, Hiroshi; Gómez‐Bombarelli, Rafael; Aguilera‐Iparraguirre, Jorge; Hirzel, Timothy; Aspuru‐Guzik, Alán; Kim, Sunghan; Lee, Sangyoon

Note: Order does not necessarily reflect citation order of authors.

Citation: Ihn, S., N. Lee, S. O. Jeon, M. Sim, H. Kang, Y. Jung, D. H. Huh, et al. 2017. “An Alternative Host Material for Long‐Lifespan Blue Organic Light‐Emitting Diodes Using Thermally Activated Delayed Fluorescence.” Advanced Science 4 (8): 1600502. doi:10.1002/advs.201600502. http://dx.doi.org/10.1002/advs.201600502.
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Abstract: It has been challenging to find stable blue organic light emitting diodes (OLEDs) that rely on thermally activated delayed fluorescence (TADF). Lack of stable host materials well‐fitted to the TADF emitters is one of the critical reasons. The most popular host for blue TADF, bis[2‐(diphenylphosphino)phenyl] ether oxide (DPEPO), leads to unrealistically high maximum external quantum efficiency. DPEPO is however an unstable material and has a poor charge transporting ability, which in turn induces an intrinsic short OLED operating lifespan. Here, an alternative host material is introduced which educes the potential efficiency and device lifespan of given TADF emitters with the appropriateness of replacing the most popular host material, DPEPO, in developing blue TADF emitters. It simultaneously provides much longer device lifespan and higher external quantum efficiency at a practical brightness due to its high material stability and electron‐transport‐type character well‐fitted for hole‐transport‐type TADF emitters.
Published Version: doi:10.1002/advs.201600502
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5566347/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:34375355
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