Degradation kinetics in different polymer-fullerene blends investigated by electron spin resonance

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F18%3AN0000064" target="_blank" >RIV/00177016:_____/18:N0000064 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1557/jmr.2018.210" target="_blank" >http://dx.doi.org/10.1557/jmr.2018.210</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1557/jmr.2018.210" target="_blank" >10.1557/jmr.2018.210</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Degradation kinetics in different polymer-fullerene blends investigated by electron spin resonance

Popis výsledku v původním jazyce

We investigate the photostability of a set of organic semiconductor blends comprising a conjugated polymer as the donor and a fullerene as the acceptor using electron spin resonance (ESR). In the absence of oxygen, all blends show excellent stability. Even after several hundred hours of exposure to solar or UV radiation, the ESR spectra and the recombination of photoinduced charges recorded at low temperature are found to be unchanged. By contrast, the presence of oxygen leads to a fast light-induced degradation rendering the ability of the donor/acceptor system to form photoinduced charge carriers. Our findings suggest that conjugated polymer–fullerene blends exhibit very good photostability and that oxygen needs to be excluded in optoelectronic applications. Our findings also suggest that at low temperature, a universal recombination process of long-lived photoinduced charges is active, which does not depend on the electronic structure or the morphology of the investigated materials.

Název v anglickém jazyce

Degradation kinetics in different polymer-fullerene blends investigated by electron spin resonance

Popis výsledku anglicky

We investigate the photostability of a set of organic semiconductor blends comprising a conjugated polymer as the donor and a fullerene as the acceptor using electron spin resonance (ESR). In the absence of oxygen, all blends show excellent stability. Even after several hundred hours of exposure to solar or UV radiation, the ESR spectra and the recombination of photoinduced charges recorded at low temperature are found to be unchanged. By contrast, the presence of oxygen leads to a fast light-induced degradation rendering the ability of the donor/acceptor system to form photoinduced charge carriers. Our findings suggest that conjugated polymer–fullerene blends exhibit very good photostability and that oxygen needs to be excluded in optoelectronic applications. Our findings also suggest that at low temperature, a universal recombination process of long-lived photoinduced charges is active, which does not depend on the electronic structure or the morphology of the investigated materials.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10401 - Organic chemistry

Projekt

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Journal of Materials Research

ISSN

0884-2914

e-ISSN

2044-5326

Svazek periodika

33

Číslo periodika v rámci svazku

13

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

1853-1859

Kód UT WoS článku

000438739300003

EID výsledku v databázi Scopus

2-s2.0-85049990194