Synthesis and electroluminescence properties of a novel tetraphenylsilane–oxadiazole–diphenyl(para-tolyl)amine polymer
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| Title: | Synthesis and electroluminescence properties of a novel tetraphenylsilane–oxadiazole–diphenyl(para-tolyl)amine polymer |
|---|---|
| Authors: | Lee, Rong-Ho1 lerongho@yuntech.edu.tw, Hsu, Hsin-Fang1, Chan, Li-Hsin2, Chen, Chin-Ti2 |
| Source: | Polymer. Sep2006, Vol. 47 Issue 20, p7001-7012. 12p. |
| Subjects: | Polymers, Thin films, Temperature, Spectrum analysis, Macromolecules |
| Abstract: | Abstract: A novel triarylaminooxadiazole-containing tetraphenylsilane light-emitting polymer (PTOA) has been synthesized. Excellent thermal stability was observed due to the presence of a rigid tetraphenylsilane-based polymer backbone (T g =218°C, T d =373°C). In solution, PTOA shows photoluminescence (PL) with an emission maximum at 426nm, which is attributed to the light-emitting unit of the triarylaminooxadiazole group. In solid film, the emission maximum of PL is observed at 458nm, a 32nm red-shift from the PL in solution. The solvatochromic effect and excimer formed in the solid film are responsible for the red-shifting and broadening of the PL emission band. The PL stability and morphology of the PTOA solid film were further investigated by thermal annealing at elevated temperatures. No significant difference in the PL spectra or morphology was observed between a pristine sample and a repeatedly thermally annealed film (at 200°C). PTOA-based PLED shows EL with a main peak at 458nm accompanied by a shoulder at around 530nm. The light emission from electromer or electroplex leads to a broadening of the EL spectra (400–650nm), which corresponds to the interaction between the oxadiazole and diphenyl(4-tolyl)amine groups in different polymer segments or chains. A sky blue emission (Commission Internationale de L''Eclairage (CIE x ,y ) coordinates (0.20,0.23)) was obtained for PTOA-based PLED. The brightness and efficiency of the PLED can be as high as 248cd/m2 and 0.54cd/A, respectively. The EL of PTOA-based PLED has been further improved by blending the PTOA with poly(n-vinylcarbazole) (PVK) in different concentrations. The effects of concentration on the PL and EL were studied for the PTOA–PVK composite film-based PLEDs. [Copyright &y& Elsevier] |
| Copyright of Polymer is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Items | – Name: Title Label: Title Group: Ti Data: Synthesis and electroluminescence properties of a novel tetraphenylsilane–oxadiazole–diphenyl(para-tolyl)amine polymer – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Lee%2C+Rong-Ho%22">Lee, Rong-Ho</searchLink><relatesTo>1</relatesTo><i> lerongho@yuntech.edu.tw</i><br /><searchLink fieldCode="AR" term="%22Hsu%2C+Hsin-Fang%22">Hsu, Hsin-Fang</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Chan%2C+Li-Hsin%22">Chan, Li-Hsin</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Chen%2C+Chin-Ti%22">Chen, Chin-Ti</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Polymer%22">Polymer</searchLink>. Sep2006, Vol. 47 Issue 20, p7001-7012. 12p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Polymers%22">Polymers</searchLink><br /><searchLink fieldCode="DE" term="%22Thin+films%22">Thin films</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature%22">Temperature</searchLink><br /><searchLink fieldCode="DE" term="%22Spectrum+analysis%22">Spectrum analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Macromolecules%22">Macromolecules</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract: A novel triarylaminooxadiazole-containing tetraphenylsilane light-emitting polymer (PTOA) has been synthesized. Excellent thermal stability was observed due to the presence of a rigid tetraphenylsilane-based polymer backbone (T g =218°C, T d =373°C). In solution, PTOA shows photoluminescence (PL) with an emission maximum at 426nm, which is attributed to the light-emitting unit of the triarylaminooxadiazole group. In solid film, the emission maximum of PL is observed at 458nm, a 32nm red-shift from the PL in solution. The solvatochromic effect and excimer formed in the solid film are responsible for the red-shifting and broadening of the PL emission band. The PL stability and morphology of the PTOA solid film were further investigated by thermal annealing at elevated temperatures. No significant difference in the PL spectra or morphology was observed between a pristine sample and a repeatedly thermally annealed film (at 200°C). PTOA-based PLED shows EL with a main peak at 458nm accompanied by a shoulder at around 530nm. The light emission from electromer or electroplex leads to a broadening of the EL spectra (400–650nm), which corresponds to the interaction between the oxadiazole and diphenyl(4-tolyl)amine groups in different polymer segments or chains. A sky blue emission (Commission Internationale de L''Eclairage (CIE x ,y ) coordinates (0.20,0.23)) was obtained for PTOA-based PLED. The brightness and efficiency of the PLED can be as high as 248cd/m2 and 0.54cd/A, respectively. The EL of PTOA-based PLED has been further improved by blending the PTOA with poly(n-vinylcarbazole) (PVK) in different concentrations. The effects of concentration on the PL and EL were studied for the PTOA–PVK composite film-based PLEDs. [Copyright &y& Elsevier] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Polymer is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.polymer.2006.07.074 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 7001 Subjects: – SubjectFull: Polymers Type: general – SubjectFull: Thin films Type: general – SubjectFull: Temperature Type: general – SubjectFull: Spectrum analysis Type: general – SubjectFull: Macromolecules Type: general Titles: – TitleFull: Synthesis and electroluminescence properties of a novel tetraphenylsilane–oxadiazole–diphenyl(para-tolyl)amine polymer Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Lee, Rong-Ho – PersonEntity: Name: NameFull: Hsu, Hsin-Fang – PersonEntity: Name: NameFull: Chan, Li-Hsin – PersonEntity: Name: NameFull: Chen, Chin-Ti IsPartOfRelationships: – BibEntity: Dates: – D: 20 M: 09 Text: Sep2006 Type: published Y: 2006 Identifiers: – Type: issn-print Value: 00323861 Numbering: – Type: volume Value: 47 – Type: issue Value: 20 Titles: – TitleFull: Polymer Type: main |
| ResultId | 1 |
