Deep-blue emitting poly(2′,3′,6′,7′-tetraoctyl-2,7-spirosilabifluorene) simultaneously with good color purity and high external quantum efficiency
摘要:
A deep-blue emitting poly(2',3',6',7'-tetraoctyl-2,7-spirosilabifluorene), namely PSSiBF, has been newly developed for PLEDs. Unlike the previously-reported alkyl-functionalized P27SiF, the unwanted aggregation can be effectively prevented in PSSiBF due to the perpendicular arrangement between two spiro-linked dibenzosilole moieties. Compared with P27SiF (Phi(PL)=0.62), consequently, an improved PLQY of 0.84 is obtained for the film of PSSiBF accompanied by a significant reduction of the long-wavelength emission in the range of 450-550 nm. Based on a double-layer device configuration, PSSiBF gives a bright deep-blue electroluminescence, revealing a state-of-art EQE of 2.8% and CIE coordinates of (0.16, 0.06). The simultaneous realization of good color purity and high EQE clearly implies that the silicon-containing polymers do have the great potential in efficient PLEDs.
Deep-blue emitting poly[spiro(dibenzoazasiline-10′,9-silafluorene)] for power-efficient PLEDs
作者:Xiushang Xu、Xuefei Li、Shumeng Wang、Junqiao Ding、Lixiang Wang
DOI:10.1039/c8tc03074j
日期:——
A deep-blue emitting polymer PSDBASiF is developed for power-efficient PLEDs by replacing dibenzosilole with dibenzoazasiline to upshift its HOMO/LUMO levels.
Highly efficient and stable blue polymer light emitting diodes based on polysilafluorenes with pendent hole transporting groups
作者:Guangrong Jin、Lianpeng Xia、Zhe Liu、Hong Lin、Jun Ling、Hongbin Wu、Lintao Hou、Yueqi Mo
DOI:10.1039/c5tc03665h
日期:——
Two homopolymers of triphenylamine and carbazole grafting silafluorenes (PSF-TPAandPSF-Cz) were synthesized and their electroluminescence properties were investigated in this paper.
Deep-blue emitting poly(2′,3′,6′,7′-tetraoctyl-2,7-spirosilabifluorene) simultaneously with good color purity and high external quantum efficiency
作者:Xiushang Xu、Keyan Bai、Junqiao Ding、Lixiang Wang
DOI:10.1016/j.orgel.2018.04.046
日期:2018.8
A deep-blue emitting poly(2',3',6',7'-tetraoctyl-2,7-spirosilabifluorene), namely PSSiBF, has been newly developed for PLEDs. Unlike the previously-reported alkyl-functionalized P27SiF, the unwanted aggregation can be effectively prevented in PSSiBF due to the perpendicular arrangement between two spiro-linked dibenzosilole moieties. Compared with P27SiF (Phi(PL)=0.62), consequently, an improved PLQY of 0.84 is obtained for the film of PSSiBF accompanied by a significant reduction of the long-wavelength emission in the range of 450-550 nm. Based on a double-layer device configuration, PSSiBF gives a bright deep-blue electroluminescence, revealing a state-of-art EQE of 2.8% and CIE coordinates of (0.16, 0.06). The simultaneous realization of good color purity and high EQE clearly implies that the silicon-containing polymers do have the great potential in efficient PLEDs.