Synergistic effects of hydrogen-bonds and hybridized excited-state observed for high efficiency, deep-blue fluorescent emitter with narrow emission in OLED applications - Journal of Materials Chemistry C (RSC Publishing)

April 04, 2019 0 Comments

Synergistic effects of hydrogen-bonds and hybridized excited-state observed for high efficiency, deep-blue fluorescent emitter with narrow emission in OLED applications - Journal of Materials Chemistry C (RSC Publishing) Efficient deep-blue fluorescent and high color purity (narrow emission) are highly desired characteristics for the organic light-emitting diodes (OLEDs). Herein, we report the hydrogen-bonds (H-bonds) induced narrow emission based on a donor-acceptor type molecule TPA-PPI-OH with a hydroxyl (-OH) substituent. Nuclear magnetic resonance (NMR) spectroscopy and single X-ray crystal data indicated existence of intra- and intermolecular H-bonds interactions in TPA-PPI-OH. These interactions proved beneficial to suppress the structural vibrations thereby caused narrower full-width at half-maximum (FWHM) PL emission of TPA-PPI-OH as compared with its hydroxy-free counterpart TPA-PPI (57 nm vs 63 nm in film). The photophysical properties revealed that the lowest excited state (S1) of TPA-PPI-OH is a hybridized local and charge-transfer excited state, thus TPA-PPI-OH showed high fluorescence efficiencies in various solvents (50% even in acetonitrile). The non-doped deep-blue device based on TPA-PPI-OH exhibited a maximum EQE of 7.37% with small efficiency roll-off (7.37% @ 100 cd m-2; 5.48% @ 1000 cd m-2) and narrow FWHM of 58 nm (71 nm for TPA-PPI). The article wasreceived on 20 Jan 2019,accepted on 01 Apr 2019andfirst published on 03 Apr 2019 X. Qiu, Y. Xu, C. Wang, M. Hanif, J. Zhou, C. Zeng, Y. Li, Q. Jiang, R. Zhao, D. Hu and Y. Ma, J. Mater. Chem. C, 2019, Accepted Manuscript, DOI: 10.1039/C9TC00357F If you are not the author of this article and you wish to reproduce material from it in a third party non-RSC publication you mustformally request permission using Copyright Clearance Center. Go to ourInstructions for using Copyright Clearance Center page for details. Authors contributing to RSC publications (journal articles, books or book chapters) do not need to formally request permission to reproduce material contained in this article provided that the correct acknowledgement is given with the reproduced material. Reproduced material should be attributed as follows: For reproduction of material from NJC: Reproduced from Ref. XX with permission from the Centre National de la Recherche Scientifique (CNRS) and The Royal Society of Chemistry. For reproduction of material from PCCP: Reproduced from Ref. XX with permission from the PCCP Owner Societies. For reproduction of material from PPS: Reproduced from Ref. XX with permission from the European Society for Photobiology, the European Photochemistry Association, and The Royal Society of Chemistry. For reproduction of material from all other RSC journals and books: Reproduced from Ref. XX with permission from The Royal Society of Chemistry. If the material has been adapted instead of reproduced from the original RSC publication "Reproduced from" can be substituted with "Adapted from". In all cases the Ref. XX is the XXth reference in the list of references. If you are the author of this article you do not need to formally request permission to reproduce figures, diagrams etc. contained in this article in third party publications or in a thesis or dissertation provided that the correct acknowledgement is given with the reproduced material. Reproduced material should be attributed as follows: For reproduction of material from NJC: [Original citation] - Reproduced by permission of The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC For reproduction of material from PCCP: [Original citation] - Reproduced by permission of the PCCP Owner Societies For reproduction of material from PPS: [Original citation] - Reproduced by permission of The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC For reproduction of material from all other RSC journals: [Original citation] - Reproduced by permission of The Royal Society of Chemistry If you are the author of this article you still need to obtain permission to reproduce the whole article in a third party publication with the exception of reproduction of the whole article in a thesis or dissertation. Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.



Also in Industry News

Hirschsprung's Disease Genetic Analysis Reveals Mix of Common, Rare Risk Variants
Hirschsprung's Disease Genetic Analysis Reveals Mix of Common, Rare Risk Variants

May 24, 2019 0 Comments

NEW YORK (GenomeWeb) – Genetic factors that contribute to a highly heritable developmental condition called Hirschsprung's disease include a complex suite of risk variants, ranging from common polymorphisms in non-coding elements to rarer coding variants and copy number variants (CNVs), according to new research from investigators at Johns Hopkins University, the University of Washington, the Broad Institute, and New York University. "In our study, we found that the risk of the complex phenotype...

Read More

Correction to: Modulation of lipolysis and glycolysis pathways in cancer stem cells changed multipotentiality and differentiation capacity toward endothelial lineage
Correction to: Modulation of lipolysis and glycolysis pathways in cancer stem cells changed multipotentiality and differentiation capacity toward endothelial lineage

May 24, 2019 0 Comments

In the publication of this article [1], there is an error in one of the contributing author names. The error: ‘Jalal Abdolali Zade’ Should instead read: ‘Jalal Abdolalizadeh’ Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, prov...

Read More

Protein Expression: basic concepts to new directions
Protein Expression: basic concepts to new directions

May 24, 2019 0 Comments

Date: Tuesday, 11 June, 2019 Time: 09:30  – 13:00 Place: Fèlix Serratosa,  Parc Cientific de Barcelona (PCB) This short workshop will describe many aspects of heterologous expression in E.coli, from choice of construct design through to methods to improve the levels of soluble expression and options for co-expression. In addition, it will also address expression in eukaryotic hosts, including secreted proteins and ECDs, and options for co-expression. The workshop will finish with a discussion an...

Read More