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Habib Bouchriha - One of the best experts on this subject based on the ideXlab platform.
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Delayed Fluorescence in alpha-quaterthiophene single crystal
Synthetic Metals, 2012Co-Authors: M.a. Saidani, A. Benfredj, Fayçal Kouki, S. Romdhane, J.l. Fave, Habib BouchrihaAbstract:The photoluminescence spectra were recorded, in alpha-quaterthiophene (alpha-4T) single crystal, for visible and UV excitation light. The latter exhibits a blueshift of about 5 meV with respect to the former. This value is comparable to the Van Der Waals energy. Delayed Fluorescence (DF), in alpha-quaterthiophene (alpha-4T) single crystal, was observed at room temperature. The Delayed Fluorescence emitted is explained in terms of a triplet exciton fusion model or the so called triplet-triplet excitons annihilation. Triplet excitons were created using direct excitation in their absorption band (1.91 eV). From the involved spectrum of Delayed Fluorescence the Davydov Splitting was experimentally evaluated. (c) 2011 Elsevier B.V. All rights reserved.
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Delayed Fluorescence in α-quaterthiophene single crystal
Synthetic Metals, 2012Co-Authors: M.a. Saidani, A. Benfredj, Fayçal Kouki, S. Romdhane, J.l. Fave, Habib BouchrihaAbstract:International audienceThe photoluminescence spectra were recorded, in alpha-quaterthiophene (alpha-4T) single crystal, for visible and UV excitation light. The latter exhibits a blueshift of about 5 meV with respect to the former. This value is comparable to the Van Der Waals energy. Delayed Fluorescence (DF), in alpha-quaterthiophene (alpha-4T) single crystal, was observed at room temperature. The Delayed Fluorescence emitted is explained in terms of a triplet exciton fusion model or the so called triplet-triplet excitons annihilation. Triplet excitons were created using direct excitation in their absorption band (1.91 eV). From the involved spectrum of Delayed Fluorescence the Davydov Splitting was experimentally evaluated. (c) 2011 Elsevier B.V. All rights reserved
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Delayed Fluorescence in α-quaterthiophene single crystal
Synthetic Metals, 2011Co-Authors: M.a. Saidani, A. Benfredj, Fayçal Kouki, S. Romdhane, J.l. Fave, Habib BouchrihaAbstract:Abstract The photoluminescence spectra were recorded, in α-quaterthiophene (α-4T) single crystal, for visible and UV excitation light. The latter exhibits a blueshift of about 5 meV with respect to the former. This value is comparable to the Van Der Waals energy. Delayed Fluorescence (DF), in α-quaterthiophene (α-4T) single crystal, was observed at room temperature. The Delayed Fluorescence emitted is explained in terms of a triplet exciton fusion model or the so called triplet–triplet excitons annihilation. Triplet excitons were created using direct excitation in their absorption band (1.91 eV). From the involved spectrum of Delayed Fluorescence the Davydov Splitting was experimentally evaluated.
Chihaya Adachi - One of the best experts on this subject based on the ideXlab platform.
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Highly efficient thermally activated Delayed Fluorescence with slow reverse intersystem crossing
Chemistry Letters, 2019Co-Authors: Hiroki Noda, Hajime Nakanotani, Chihaya AdachiAbstract:We report an efficient luminescent molecule exhibiting thermally activated Delayed Fluorescence with a long-Delayed Fluorescence lifetime of 0.8 ms. Although the reverse intersystem crossing rate c...
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long lived efficient Delayed Fluorescence organic light emitting diodes using n type hosts
Nature Communications, 2017Co-Authors: Linsong Cui, Hajime Nakanotani, Shi Bin Ruan, Fatima Bencheikh, Ryo Nagata, Lei Zhang, Ko Inada, Liangsheng Liao, Chihaya AdachiAbstract:Organic light-emitting diodes have become a mainstream display technology because of their desirable features. Third-generation electroluminescent devices that emit light through a mechanism called thermally activated Delayed Fluorescence are currently garnering much attention. However, unsatisfactory device stability is still an unresolved issue in this field. Here we demonstrate that electron-transporting n-type hosts, which typically include an acceptor moiety in their chemical structure, have the intrinsic ability to balance the charge fluxes and broaden the recombination zone in Delayed Fluorescence organic electroluminescent devices, while at the same time preventing the formation of high-energy excitons. The n-type hosts lengthen the lifetimes of green and blue Delayed Fluorescence devices by > 30 and 1000 times, respectively. Our results indicate that n-type hosts are suitable to realize stable Delayed Fluorescence organic electroluminescent devices.
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Thermally Activated Delayed Fluorescence from Pentacarbazorylbenzonitrile
Chemistry Letters, 2016Co-Authors: Shuho Tanimoto, Hajime Nakanotani, Takatsugu Suzuki, Chihaya AdachiAbstract:A benzonitrile derivative substituted by five carbazoles (5CzBN), which emits thermally activated Delayed Fluorescence (TADF), was synthesized and evaluated. The organic light-emitting diode (OLED) containing 5CzBN demonstrated light-blue electroluminescence and a high external quantum efficiency of 14.8%.
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A Phenazaborin-Based High-Efficiency Blue Delayed Fluorescence Material
Bulletin of the Chemical Society of Japan, 2016Co-Authors: In Seob Park, Chihaya Adachi, Masaki Numata, Takuma YasudaAbstract:A highly efficient blue thermally activated Delayed Fluorescence (TADF) material based on phenazaborin and spiroacridan units was developed. A blue-emitting organic light-emitting diode containing ...
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efficient blue organic light emitting diodes employing thermally activated Delayed Fluorescence
Nature Photonics, 2014Co-Authors: Qisheng Zhang, Hiroko Nomura, Shuping Huang, Chihaya Adachi, Hiroyuki Tanaka, Bo LiAbstract:Blue organic light-emitting diodes that harness thermally activated Delayed Fluorescence are realized with an external quantum efficiency of 19.5% and reduced roll-off at high luminance.
M.a. Saidani - One of the best experts on this subject based on the ideXlab platform.
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Delayed Fluorescence in alpha-quaterthiophene single crystal
Synthetic Metals, 2012Co-Authors: M.a. Saidani, A. Benfredj, Fayçal Kouki, S. Romdhane, J.l. Fave, Habib BouchrihaAbstract:The photoluminescence spectra were recorded, in alpha-quaterthiophene (alpha-4T) single crystal, for visible and UV excitation light. The latter exhibits a blueshift of about 5 meV with respect to the former. This value is comparable to the Van Der Waals energy. Delayed Fluorescence (DF), in alpha-quaterthiophene (alpha-4T) single crystal, was observed at room temperature. The Delayed Fluorescence emitted is explained in terms of a triplet exciton fusion model or the so called triplet-triplet excitons annihilation. Triplet excitons were created using direct excitation in their absorption band (1.91 eV). From the involved spectrum of Delayed Fluorescence the Davydov Splitting was experimentally evaluated. (c) 2011 Elsevier B.V. All rights reserved.
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Delayed Fluorescence in α-quaterthiophene single crystal
Synthetic Metals, 2012Co-Authors: M.a. Saidani, A. Benfredj, Fayçal Kouki, S. Romdhane, J.l. Fave, Habib BouchrihaAbstract:International audienceThe photoluminescence spectra were recorded, in alpha-quaterthiophene (alpha-4T) single crystal, for visible and UV excitation light. The latter exhibits a blueshift of about 5 meV with respect to the former. This value is comparable to the Van Der Waals energy. Delayed Fluorescence (DF), in alpha-quaterthiophene (alpha-4T) single crystal, was observed at room temperature. The Delayed Fluorescence emitted is explained in terms of a triplet exciton fusion model or the so called triplet-triplet excitons annihilation. Triplet excitons were created using direct excitation in their absorption band (1.91 eV). From the involved spectrum of Delayed Fluorescence the Davydov Splitting was experimentally evaluated. (c) 2011 Elsevier B.V. All rights reserved
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Delayed Fluorescence in α-quaterthiophene single crystal
Synthetic Metals, 2011Co-Authors: M.a. Saidani, A. Benfredj, Fayçal Kouki, S. Romdhane, J.l. Fave, Habib BouchrihaAbstract:Abstract The photoluminescence spectra were recorded, in α-quaterthiophene (α-4T) single crystal, for visible and UV excitation light. The latter exhibits a blueshift of about 5 meV with respect to the former. This value is comparable to the Van Der Waals energy. Delayed Fluorescence (DF), in α-quaterthiophene (α-4T) single crystal, was observed at room temperature. The Delayed Fluorescence emitted is explained in terms of a triplet exciton fusion model or the so called triplet–triplet excitons annihilation. Triplet excitons were created using direct excitation in their absorption band (1.91 eV). From the involved spectrum of Delayed Fluorescence the Davydov Splitting was experimentally evaluated.
J.l. Fave - One of the best experts on this subject based on the ideXlab platform.
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Delayed Fluorescence in alpha-quaterthiophene single crystal
Synthetic Metals, 2012Co-Authors: M.a. Saidani, A. Benfredj, Fayçal Kouki, S. Romdhane, J.l. Fave, Habib BouchrihaAbstract:The photoluminescence spectra were recorded, in alpha-quaterthiophene (alpha-4T) single crystal, for visible and UV excitation light. The latter exhibits a blueshift of about 5 meV with respect to the former. This value is comparable to the Van Der Waals energy. Delayed Fluorescence (DF), in alpha-quaterthiophene (alpha-4T) single crystal, was observed at room temperature. The Delayed Fluorescence emitted is explained in terms of a triplet exciton fusion model or the so called triplet-triplet excitons annihilation. Triplet excitons were created using direct excitation in their absorption band (1.91 eV). From the involved spectrum of Delayed Fluorescence the Davydov Splitting was experimentally evaluated. (c) 2011 Elsevier B.V. All rights reserved.
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Delayed Fluorescence in α-quaterthiophene single crystal
Synthetic Metals, 2012Co-Authors: M.a. Saidani, A. Benfredj, Fayçal Kouki, S. Romdhane, J.l. Fave, Habib BouchrihaAbstract:International audienceThe photoluminescence spectra were recorded, in alpha-quaterthiophene (alpha-4T) single crystal, for visible and UV excitation light. The latter exhibits a blueshift of about 5 meV with respect to the former. This value is comparable to the Van Der Waals energy. Delayed Fluorescence (DF), in alpha-quaterthiophene (alpha-4T) single crystal, was observed at room temperature. The Delayed Fluorescence emitted is explained in terms of a triplet exciton fusion model or the so called triplet-triplet excitons annihilation. Triplet excitons were created using direct excitation in their absorption band (1.91 eV). From the involved spectrum of Delayed Fluorescence the Davydov Splitting was experimentally evaluated. (c) 2011 Elsevier B.V. All rights reserved
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Delayed Fluorescence in α-quaterthiophene single crystal
Synthetic Metals, 2011Co-Authors: M.a. Saidani, A. Benfredj, Fayçal Kouki, S. Romdhane, J.l. Fave, Habib BouchrihaAbstract:Abstract The photoluminescence spectra were recorded, in α-quaterthiophene (α-4T) single crystal, for visible and UV excitation light. The latter exhibits a blueshift of about 5 meV with respect to the former. This value is comparable to the Van Der Waals energy. Delayed Fluorescence (DF), in α-quaterthiophene (α-4T) single crystal, was observed at room temperature. The Delayed Fluorescence emitted is explained in terms of a triplet exciton fusion model or the so called triplet–triplet excitons annihilation. Triplet excitons were created using direct excitation in their absorption band (1.91 eV). From the involved spectrum of Delayed Fluorescence the Davydov Splitting was experimentally evaluated.
A. Benfredj - One of the best experts on this subject based on the ideXlab platform.
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Delayed Fluorescence in alpha-quaterthiophene single crystal
Synthetic Metals, 2012Co-Authors: M.a. Saidani, A. Benfredj, Fayçal Kouki, S. Romdhane, J.l. Fave, Habib BouchrihaAbstract:The photoluminescence spectra were recorded, in alpha-quaterthiophene (alpha-4T) single crystal, for visible and UV excitation light. The latter exhibits a blueshift of about 5 meV with respect to the former. This value is comparable to the Van Der Waals energy. Delayed Fluorescence (DF), in alpha-quaterthiophene (alpha-4T) single crystal, was observed at room temperature. The Delayed Fluorescence emitted is explained in terms of a triplet exciton fusion model or the so called triplet-triplet excitons annihilation. Triplet excitons were created using direct excitation in their absorption band (1.91 eV). From the involved spectrum of Delayed Fluorescence the Davydov Splitting was experimentally evaluated. (c) 2011 Elsevier B.V. All rights reserved.
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Delayed Fluorescence in α-quaterthiophene single crystal
Synthetic Metals, 2012Co-Authors: M.a. Saidani, A. Benfredj, Fayçal Kouki, S. Romdhane, J.l. Fave, Habib BouchrihaAbstract:International audienceThe photoluminescence spectra were recorded, in alpha-quaterthiophene (alpha-4T) single crystal, for visible and UV excitation light. The latter exhibits a blueshift of about 5 meV with respect to the former. This value is comparable to the Van Der Waals energy. Delayed Fluorescence (DF), in alpha-quaterthiophene (alpha-4T) single crystal, was observed at room temperature. The Delayed Fluorescence emitted is explained in terms of a triplet exciton fusion model or the so called triplet-triplet excitons annihilation. Triplet excitons were created using direct excitation in their absorption band (1.91 eV). From the involved spectrum of Delayed Fluorescence the Davydov Splitting was experimentally evaluated. (c) 2011 Elsevier B.V. All rights reserved
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Delayed Fluorescence in α-quaterthiophene single crystal
Synthetic Metals, 2011Co-Authors: M.a. Saidani, A. Benfredj, Fayçal Kouki, S. Romdhane, J.l. Fave, Habib BouchrihaAbstract:Abstract The photoluminescence spectra were recorded, in α-quaterthiophene (α-4T) single crystal, for visible and UV excitation light. The latter exhibits a blueshift of about 5 meV with respect to the former. This value is comparable to the Van Der Waals energy. Delayed Fluorescence (DF), in α-quaterthiophene (α-4T) single crystal, was observed at room temperature. The Delayed Fluorescence emitted is explained in terms of a triplet exciton fusion model or the so called triplet–triplet excitons annihilation. Triplet excitons were created using direct excitation in their absorption band (1.91 eV). From the involved spectrum of Delayed Fluorescence the Davydov Splitting was experimentally evaluated.