2018
DOI: 10.1002/aelm.201800354
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Manipulating the Molecular Backbone to Achieve Highly Emissive Sky‐Blue AIEgens and Their Applications in Nondoped Organic Light‐Emitting Diodes

Abstract: performance are also necessary. [6] Unfortunately, unlike the red and green emitters, highly emissive blue OLMs in devices are rare due to their wide bandgap, but recently it has been demonstrated that OLMs with impressive and robust solid-state photoluminescence (PL) efficiency is beneficial to enhance their EL performance in OLEDs significantly. [7] Therefore, developing highly emissive blue OLMs in aggregated solid state becomes one of the key procedures to achieve the corresponding efficient OLEDs.For mo… Show more

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Cited by 13 publications
(7 citation statements)
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“…Lifetimes of 26.2, 14.6, and 21.8 ns were measured for PTCA‐C4, PTCA‐C6, and PTCA‐C12 in the solid state, respectively, thereby leading to altered k r values and k nr values. A much higher k r value was determined in the case of PTCA‐C6, thus leading to open radiative decay channels and high‐intensity emission . It can be easily understood that in the case of PTCA‐C4, emission‐quenching intermolecular stacking may still exist with the short alkyl chains, thus leading to moderate fluorescence performance.…”
Section: Resultsmentioning
confidence: 92%
See 1 more Smart Citation
“…Lifetimes of 26.2, 14.6, and 21.8 ns were measured for PTCA‐C4, PTCA‐C6, and PTCA‐C12 in the solid state, respectively, thereby leading to altered k r values and k nr values. A much higher k r value was determined in the case of PTCA‐C6, thus leading to open radiative decay channels and high‐intensity emission . It can be easily understood that in the case of PTCA‐C4, emission‐quenching intermolecular stacking may still exist with the short alkyl chains, thus leading to moderate fluorescence performance.…”
Section: Resultsmentioning
confidence: 92%
“…Am uch higher k r value was determined in the case of PTCA-C6, thus leadingt oo pen radiatived ecay channels and high-intensity emission. [40] It can be easily understood that in the case of PTCA-C4, emission-quenching intermolecular stacking may still exist with the short alkyl chains, thus leadingtom oderate fluorescence performance. However,i nt he case of PTCA-C12, althoughi ntermoleculars tacking may be prevented, the long chains can be considereda sm olecular rotors, therebyp romoting intramolecular motion in the excited state andl eadingt o the corresponding nonradiative relaxation process, resulting in reduced emission in the solid state.…”
Section: Resultsmentioning
confidence: 99%
“…It was mentioned that the combination of fragments of carbazole with various conjugated aromatic fragments is favorable for the formation of homogeneous thin films with high T g temperature values. The T g of E1, E3-E6, E9-E10, E14, E17, and E18 were 105,138,65,138,77,70,211,88,170, and 172 • C, respectively. The values of I p for the derivatives E1-E2 and E19-E20 were 5.70 eV, 5.56 eV, 5.17 eV, and 5.30 eV, respectively.…”
Section: Diaryl(arylamino)-substituted Carbazoles As Fluorescent Emitters Of Oledsmentioning
confidence: 96%
“…Structures of the 2,7-diaryl-or 3,6-diaryl-substituted carbazoles, which were used as emitters (E) in the fluorescent OLED devices, are shown in Scheme 7. All the target diarylsubstituted compounds E1-E13 [85][86][87][88][89][90][91][92][93] and E15-E20 [94][95][96][97], except for E14, were obtained during the Suzuki reaction of the di-halogenated carbazoles with the corresponding boronic acids or their esters. The objective material E14 was synthesized by fusing triphenylethylene and one dimesitylboron group moiety into a system, with one attached to the carbazole fragment [98].…”
Section: Diaryl(arylamino)-substituted Carbazoles As Fluorescent Emitters Of Oledsmentioning
confidence: 99%
“…[8][9][10] Moreover, due to the advantages like excellent thermal stability, high purity, good thin film formation and solution processability of star/butterfly-shaped molecules over the linear molecules, they have gained enormous attention in the recent past. [11][12][13][14] To date, there has been a rapid technological development in NLO which demands the rational design and synthesis of organic materials to achieve enhanced nonlinear optical properties. [15] Among the organic materials studied, the high molecular weight π-conjugated molecules with donor-acceptordonor (D-A-D) arrangement have been the attracting candidates due to their extensive π-delocalization which enables intramolecular charge transfer (ICT) between D and A units, providing high polarizability to the system, which results in superior nonlinear optical properties in addition to their fastoptical responses, ease of fabrication, light weight and flexibility.…”
Section: Introductionmentioning
confidence: 99%