Properties of polymer thin films for electronic applications investigated by temperature resolved infrared reflection-absorption spectroscopy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F20%3A63527158" target="_blank" >RIV/70883521:28610/20:63527158 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Properties of polymer thin films for electronic applications investigated by temperature resolved infrared reflection-absorption spectroscopy

Popis výsledku v původním jazyce

Polymer thin films attract the attention due to their specific properties related with thin layer arrangement of macromolecules. Semi-conductive polymer layers (e.g. MEH-PPV) found their use in light emitting diodes preparation [Skoda D. Org.Electron. 59, 2018, 337]. Insulating polymer layers (PS, PMMA, etc.) are used as matrices for incorporation of low molecular species, for example, blue emitting borane clusters [Londesborough M. Inorg.Chem. 51, 2012, 1471]. Properties of polymer thin layers (glass transition, Tg) are influenced by chain confinement near the substrate surface and cannot be investigated by routine measurement (DSC). Glass transition is related with unlocking of polymer segments motion, which can cause conformational changes of chains observable by spectroscopic methods [Olmos D. Phys.Chem.Chem.Phys. 16, 2014, 24339; Shin H.S. Vib.Spectrosc. 37, 2005, 69]. This contribution is therefore focused on the investigation of polymer Tg by infrared reflection-absorption spectroscopy (IRRAS). IRRAS spectra of thin polymer layers with borane clusters on reflective substrates are measured with increasing temperature. Tg is determined from change of slope in plot integrated absorbance vs. temperature, as well as from principal component analysis.

Název v anglickém jazyce

Properties of polymer thin films for electronic applications investigated by temperature resolved infrared reflection-absorption spectroscopy

Popis výsledku anglicky

Polymer thin films attract the attention due to their specific properties related with thin layer arrangement of macromolecules. Semi-conductive polymer layers (e.g. MEH-PPV) found their use in light emitting diodes preparation [Skoda D. Org.Electron. 59, 2018, 337]. Insulating polymer layers (PS, PMMA, etc.) are used as matrices for incorporation of low molecular species, for example, blue emitting borane clusters [Londesborough M. Inorg.Chem. 51, 2012, 1471]. Properties of polymer thin layers (glass transition, Tg) are influenced by chain confinement near the substrate surface and cannot be investigated by routine measurement (DSC). Glass transition is related with unlocking of polymer segments motion, which can cause conformational changes of chains observable by spectroscopic methods [Olmos D. Phys.Chem.Chem.Phys. 16, 2014, 24339; Shin H.S. Vib.Spectrosc. 37, 2005, 69]. This contribution is therefore focused on the investigation of polymer Tg by infrared reflection-absorption spectroscopy (IRRAS). IRRAS spectra of thin polymer layers with borane clusters on reflective substrates are measured with increasing temperature. Tg is determined from change of slope in plot integrated absorbance vs. temperature, as well as from principal component analysis.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10404 - Polymer science

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů