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
Two novel electron transporting materials(ETMs),2-(4,6-diphenyl-1,3,5-triazin-2-yl)indolo[3,2,1-jk]-carbazole(DPTrz-ICz)and 5,11-bis(4,6-diphenyl-1,3,5-triazin-2-yl)-2-phenylindolo[3,2,1-jk]carbazole(2DPTrz-ICz),were ...Two novel electron transporting materials(ETMs),2-(4,6-diphenyl-1,3,5-triazin-2-yl)indolo[3,2,1-jk]-carbazole(DPTrz-ICz)and 5,11-bis(4,6-diphenyl-1,3,5-triazin-2-yl)-2-phenylindolo[3,2,1-jk]carbazole(2DPTrz-ICz),were developed based on the indolo[3,2,1-jk]carbazole(ICz)core,combined with 2,4-diphenyl-1,3,5-triazine(DPTrz).The introduced ICz core in ETM exhibited enhanced intermolecular charge transport properties owing to its planar and rigid geometry and high triplet energy,demonstrating the potential of designing ETM.Consequently,2DPTrz-ICz,featuring high triplet energy of 2.84 eV,effectively prevented triplet exciton quenching and showed increased electron mobility owing to the activation of intermolecular hopping charge transfer facilitated by stacking architecture.The two materials were utilized as ETMs in green phosphorescent organic light-emitting diodes.2DPTrz-ICz exhibited a superior external quantum efficiency of 21.5%,higher than that of the spirobifluorene-derived ETM.展开更多
A diamine monomer(4,4’-(((5,11-dihydroindolo[3,2-b]carbazole-6,12-diyl)bis(4,l-phenyl-ene))bis(oxy))dianiline)containing a rigid conjugated indolocarbazole was designed and synthesized through a three-step reaction.A...A diamine monomer(4,4’-(((5,11-dihydroindolo[3,2-b]carbazole-6,12-diyl)bis(4,l-phenyl-ene))bis(oxy))dianiline)containing a rigid conjugated indolocarbazole was designed and synthesized through a three-step reaction.A series of high-performance functional polyimides were prepared through simple condensation polymerization of the monomer with different industrial dianhydrides 6FDA,BTDA and ODPA,respectively,which exhibit superior thermal stability,good solubility in polar organic solvents and good mechanical properties.The glass transition temperature(T_(g))is above 334℃,and the 5%weight loss temperature(T_(d5%))of polyimides under nitrogen atmosphere falls in the range of 502〜526℃.The tensile strength and tensile modulus are 49.45~60.08 MPa and 1.4-1.6 GPa,respectively.In addition,the maximum fluorescence emission wavelength of polyimides in the NMP solution(0.02 mg/mL)are around 448 nm with blue light emission and 451 nm as film without significant red shift,which indicates the prepared polyimides process a certain application potential in high-performance flexible polymer optoelectronic devices.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supported by Ministry of Trade,Industry and Energy(MOTIE)(20012622,P0017363)。
文摘Two novel electron transporting materials(ETMs),2-(4,6-diphenyl-1,3,5-triazin-2-yl)indolo[3,2,1-jk]-carbazole(DPTrz-ICz)and 5,11-bis(4,6-diphenyl-1,3,5-triazin-2-yl)-2-phenylindolo[3,2,1-jk]carbazole(2DPTrz-ICz),were developed based on the indolo[3,2,1-jk]carbazole(ICz)core,combined with 2,4-diphenyl-1,3,5-triazine(DPTrz).The introduced ICz core in ETM exhibited enhanced intermolecular charge transport properties owing to its planar and rigid geometry and high triplet energy,demonstrating the potential of designing ETM.Consequently,2DPTrz-ICz,featuring high triplet energy of 2.84 eV,effectively prevented triplet exciton quenching and showed increased electron mobility owing to the activation of intermolecular hopping charge transfer facilitated by stacking architecture.The two materials were utilized as ETMs in green phosphorescent organic light-emitting diodes.2DPTrz-ICz exhibited a superior external quantum efficiency of 21.5%,higher than that of the spirobifluorene-derived ETM.
基金This research was supported by Innovation Academy for Green Manufacture.Chinese Academy of Sciences(IAGM2020C22)the Guiding Project of Fujian Province Science and Technology Department(2020H0050)。
文摘A diamine monomer(4,4’-(((5,11-dihydroindolo[3,2-b]carbazole-6,12-diyl)bis(4,l-phenyl-ene))bis(oxy))dianiline)containing a rigid conjugated indolocarbazole was designed and synthesized through a three-step reaction.A series of high-performance functional polyimides were prepared through simple condensation polymerization of the monomer with different industrial dianhydrides 6FDA,BTDA and ODPA,respectively,which exhibit superior thermal stability,good solubility in polar organic solvents and good mechanical properties.The glass transition temperature(T_(g))is above 334℃,and the 5%weight loss temperature(T_(d5%))of polyimides under nitrogen atmosphere falls in the range of 502〜526℃.The tensile strength and tensile modulus are 49.45~60.08 MPa and 1.4-1.6 GPa,respectively.In addition,the maximum fluorescence emission wavelength of polyimides in the NMP solution(0.02 mg/mL)are around 448 nm with blue light emission and 451 nm as film without significant red shift,which indicates the prepared polyimides process a certain application potential in high-performance flexible polymer optoelectronic devices.
