Emitters with narrowband spectra are of great importance nowadays because of the growing demand for ultra-high-definition displays in the fields of panel displays and solid-state lighting.Though the reported multiple ...Emitters with narrowband spectra are of great importance nowadays because of the growing demand for ultra-high-definition displays in the fields of panel displays and solid-state lighting.Though the reported multiple resonance(MR)emitters have been widely studied with extremely sharp spectra and color-tunable emissions,the electrophilic borylation synthetic strategies and stable narrowband blue devices still face great challenges.展开更多
In this paper, two AIE-active luminogens (Oxa-pTPE and Oxa-mTPE) constructed from tetraphenylethene and oxadiazole units were successfully synthesized and their thermal, optical and electronic properties were investig...In this paper, two AIE-active luminogens (Oxa-pTPE and Oxa-mTPE) constructed from tetraphenylethene and oxadiazole units were successfully synthesized and their thermal, optical and electronic properties were investigated. By linking TPE to the oxadiazole core through meta-or para-position, the intramolecular conjugation is effectively controlled. Thanks to the intelligent molecular design and specific AIE feature, when fabricated as emissive layers in non-doped OLEDs, they exhibit blue or deep-blue emission with CIE coordinates of (0.17, 0.23) and (0.15, 0.12), and good efficiencies with ηC, max and ηP, max up to 1.52 cd A-1 and 0.84 Im W-1 , shedding some light on the construction of deep-blue AIE fluorophores.展开更多
In this work,a blue emitter with a 3 D rigid structure composed of multiple spirobifluorene(3-Spiro) has been synthesized and characterized.Through a detailed study of the electrochemical and photophysical properties ...In this work,a blue emitter with a 3 D rigid structure composed of multiple spirobifluorene(3-Spiro) has been synthesized and characterized.Through a detailed study of the electrochemical and photophysical properties of 3-Spiro,we have evidenced that 3-Spiro can be applied as an active component of organic light-emitting diodes(OLEDs).The device with 5% doping rate of 4 CzPNPh exhibits high external quantum efficiency(EQE) of 11%,which proves the potential of 3 D rigid structure emitters for OLEDs.展开更多
Aggregation-induced emission(AIE)has emerged as a new concept,giving highly efficient solid-state photoluminescence.Particularly,AIE luminogens(AIEgens)with deep blue emission(400–450 nm)have displayed salient advant...Aggregation-induced emission(AIE)has emerged as a new concept,giving highly efficient solid-state photoluminescence.Particularly,AIE luminogens(AIEgens)with deep blue emission(400–450 nm)have displayed salient advantages for non-doped organic light-emitting diodes(OLEDs).However,deep blue emitters with Commission Internationale de L’Eclairage(CIE)coordinates less than 0.08 are still rare.In this review,we outline the latest achievements in the molecular guidelines based on the AIE core of tetraphenylbenzene(TPB)for developing efficient deep blue AIEgens.We provide insights into the construction of deep blue emitters with high horizontal orientation by regulating the length of the linear molecule.We also discuss the luminescence mechanisms of these AIEgens-based OLEDs by using the magnetic field effects measurements.Finally,a summary of the challenges and perspectives of deep blue AIEgens for non-doped OLEDs is also presented.展开更多
Poly[N-（9-fluorenylmethoxycarbonyl）-L-phenylalanine] （PN9FPA） films with good fluorescence properties and chirality were prepared electrochemically by direct anodic oxidation of N-（9-fluorenylmethoxycarbonyl）- L...Poly[N-（9-fluorenylmethoxycarbonyl）-L-phenylalanine] （PN9FPA） films with good fluorescence properties and chirality were prepared electrochemically by direct anodic oxidation of N-（9-fluorenylmethoxycarbonyl）- L-phenylalanine （N9FPA） in boron trifluoride diethyletherate （BFEE）. Fourier transform infrared spectroscopy measurement showed that the polymerization of N9FPA occurred mainly at the C（2） and C（7） positions. The fluo- rescence spectra indicated that PN9FPA films were blue-light emitters. In addition, the structures and properties of the monomer and the polymers were characterized and evaluated with CV, UV, TGA and SEM.展开更多
In this paper,two AIE-active luminogens(Oxa-pTPE and Oxa-mTPE)constructed from tetraphenylethene and oxadiazole units were successfully synthesized and their thermal,optical and electronic properties were investigated...In this paper,two AIE-active luminogens(Oxa-pTPE and Oxa-mTPE)constructed from tetraphenylethene and oxadiazole units were successfully synthesized and their thermal,optical and electronic properties were investigated.By linking TPE to the oxadiazole core through meta-or para-position,the intramolecular conjugation is effectively controlled.Thanks to the intelligent molecular design and specific AIE feature,when fabricated as emissive layers in non-doped OLEDs,they exhibit blue or deep-blue emission with CIE coordinates of(0.17,0.23)and(0.15,0.12),and good efficiencies with ηC,max and ηP,max up to 1.52 cd A-1and 0.84 ImW -1,shedding some light on the construction of deep-blue AIE fluorophores.展开更多
基金This work was supported by the National Natural Science Foundation of China(Grant Nos.51903137,22135004 and 61890942)the Guangdong Basic and Applied Basic Research Foundation(2021B1515120041).
文摘Emitters with narrowband spectra are of great importance nowadays because of the growing demand for ultra-high-definition displays in the fields of panel displays and solid-state lighting.Though the reported multiple resonance(MR)emitters have been widely studied with extremely sharp spectra and color-tunable emissions,the electrophilic borylation synthetic strategies and stable narrowband blue devices still face great challenges.
基金the National Science Foundation of China(21161160556)the National Basic Research Program(973program,2013CB834700)the Open Project of State Key Laboratory of Supramolecular Structure and Materials(SKLSSM201302)
文摘In this paper, two AIE-active luminogens (Oxa-pTPE and Oxa-mTPE) constructed from tetraphenylethene and oxadiazole units were successfully synthesized and their thermal, optical and electronic properties were investigated. By linking TPE to the oxadiazole core through meta-or para-position, the intramolecular conjugation is effectively controlled. Thanks to the intelligent molecular design and specific AIE feature, when fabricated as emissive layers in non-doped OLEDs, they exhibit blue or deep-blue emission with CIE coordinates of (0.17, 0.23) and (0.15, 0.12), and good efficiencies with ηC, max and ηP, max up to 1.52 cd A-1 and 0.84 Im W-1 , shedding some light on the construction of deep-blue AIE fluorophores.
基金supported by the National Natural Science Foundation of China(No.51603055)the Natural Science Foundation of Heilongjiang Province(No.QC2017055)+1 种基金the China Postdoctoral Science Foundation(Nos.2016M601424,2017T100236)the Postdoctoral Foundation of Heilongjiang Province(Nos.LBH-Z16059,LBH-TZ10)。
文摘In this work,a blue emitter with a 3 D rigid structure composed of multiple spirobifluorene(3-Spiro) has been synthesized and characterized.Through a detailed study of the electrochemical and photophysical properties of 3-Spiro,we have evidenced that 3-Spiro can be applied as an active component of organic light-emitting diodes(OLEDs).The device with 5% doping rate of 4 CzPNPh exhibits high external quantum efficiency(EQE) of 11%,which proves the potential of 3 D rigid structure emitters for OLEDs.
基金This work is supported by the National Natural Science Foundation of China(Nos.21788102,21525417)the Natural Science Foundation of Guangdong Province,China(Nos.2019B030301003,2016A030312002)the Innovation and Technology Commission of Hong Kong,China(No.ITC-CNERC14S01).
文摘Aggregation-induced emission(AIE)has emerged as a new concept,giving highly efficient solid-state photoluminescence.Particularly,AIE luminogens(AIEgens)with deep blue emission(400–450 nm)have displayed salient advantages for non-doped organic light-emitting diodes(OLEDs).However,deep blue emitters with Commission Internationale de L’Eclairage(CIE)coordinates less than 0.08 are still rare.In this review,we outline the latest achievements in the molecular guidelines based on the AIE core of tetraphenylbenzene(TPB)for developing efficient deep blue AIEgens.We provide insights into the construction of deep blue emitters with high horizontal orientation by regulating the length of the linear molecule.We also discuss the luminescence mechanisms of these AIEgens-based OLEDs by using the magnetic field effects measurements.Finally,a summary of the challenges and perspectives of deep blue AIEgens for non-doped OLEDs is also presented.
文摘Poly[N-（9-fluorenylmethoxycarbonyl）-L-phenylalanine] （PN9FPA） films with good fluorescence properties and chirality were prepared electrochemically by direct anodic oxidation of N-（9-fluorenylmethoxycarbonyl）- L-phenylalanine （N9FPA） in boron trifluoride diethyletherate （BFEE）. Fourier transform infrared spectroscopy measurement showed that the polymerization of N9FPA occurred mainly at the C（2） and C（7） positions. The fluo- rescence spectra indicated that PN9FPA films were blue-light emitters. In addition, the structures and properties of the monomer and the polymers were characterized and evaluated with CV, UV, TGA and SEM.
文摘In this paper,two AIE-active luminogens(Oxa-pTPE and Oxa-mTPE)constructed from tetraphenylethene and oxadiazole units were successfully synthesized and their thermal,optical and electronic properties were investigated.By linking TPE to the oxadiazole core through meta-or para-position,the intramolecular conjugation is effectively controlled.Thanks to the intelligent molecular design and specific AIE feature,when fabricated as emissive layers in non-doped OLEDs,they exhibit blue or deep-blue emission with CIE coordinates of(0.17,0.23)and(0.15,0.12),and good efficiencies with ηC,max and ηP,max up to 1.52 cd A-1and 0.84 ImW -1,shedding some light on the construction of deep-blue AIE fluorophores.
