Chemical Changes and Photoluminescence Properties of UV Modified Polypyrrole

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F13%3A10132707" target="_blank" >RIV/00216208:11320/13:10132707 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/13:00423720

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Chemical Changes and Photoluminescence Properties of UV Modified Polypyrrole

Popis výsledku v původním jazyce

Effects of ultraviolet light (325 nm) irradiation on polypyrrole (PPy) properties were studied by time-resolved, standard photoluminescence (PL), optical absorption, and X-ray photoelectron (XPS) spectroscopies. PPy samples were prepared in thin films ongold, quartz, and H-terminated monocrystalline diamond (MCD) substrates by electrochemical and chemical oxidation. After the UV irradiation, all PPy samples converged to the same PL spectrum independent of initial preparation methods or substrates. We observed formation of a new, highly intensive PL band at 540 nm accompanied with few per cent increase in transmittance and structural and chemical changes of the PPy chains. The changes occurred only when the light intensity was from 0.1 to 10 W/cm2. Theeffect was reduced in vacuum. Thermal annealing had no influence. We explain the effect by chemical and structural modifications of PPy that lead to a permanent increase in quantum yield of intrachain exciton recombination.

Název v anglickém jazyce

Chemical Changes and Photoluminescence Properties of UV Modified Polypyrrole

Popis výsledku anglicky

Effects of ultraviolet light (325 nm) irradiation on polypyrrole (PPy) properties were studied by time-resolved, standard photoluminescence (PL), optical absorption, and X-ray photoelectron (XPS) spectroscopies. PPy samples were prepared in thin films ongold, quartz, and H-terminated monocrystalline diamond (MCD) substrates by electrochemical and chemical oxidation. After the UV irradiation, all PPy samples converged to the same PL spectrum independent of initial preparation methods or substrates. We observed formation of a new, highly intensive PL band at 540 nm accompanied with few per cent increase in transmittance and structural and chemical changes of the PPy chains. The changes occurred only when the light intensity was from 0.1 to 10 W/cm2. Theeffect was reduced in vacuum. Thermal annealing had no influence. We explain the effect by chemical and structural modifications of PPy that lead to a permanent increase in quantum yield of intrachain exciton recombination.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BH - Optika, masery a lasery

OECD FORD obor

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Projekt

<a href="/cs/project/GBP108%2F12%2FG108" target="_blank" >GBP108/12/G108: Příprava, modifikace a charakterizace materiálů zářením</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

International Journal of Electrochemical Science

ISSN

1452-3981

e-ISSN

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Svazek periodika

8

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

RS - Srbská republika

Počet stran výsledku

14

Strana od-do

57-70

Kód UT WoS článku

000316562800005

EID výsledku v databázi Scopus

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