Mobility of holes and polarons in polyaniline films assessed by frequency-dependent impedance and charge extraction by linearly increasing voltage

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F17%3A00481326" target="_blank" >RIV/61389013:_____/17:00481326 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/17:10366738

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.synthmet.2017.10.015" target="_blank" >http://dx.doi.org/10.1016/j.synthmet.2017.10.015</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.synthmet.2017.10.015" target="_blank" >10.1016/j.synthmet.2017.10.015</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Mobility of holes and polarons in polyaniline films assessed by frequency-dependent impedance and charge extraction by linearly increasing voltage

Popis výsledku v původním jazyce

Thin films of semiconducting polyaniline hydrochloride were deposited on glass or silicon substrates. Frequency spectra of impedance measured at several voltages display regions of holes and polarons contributions and enable to evaluate their mobility 2.7 × 10-5 cm2 V-1 s-1 at the electric field of 1 × 105 V cm-1. Good agreement of the average value 2.4 × 10-5 cm2 V-1 s-1 of holes mobility was obtained by another method-charge extraction by linearly increasing voltage (CELIV). A Poole-Frenkel type of electric field dependence of mobility assessed by frequency- dependent impedance points to trapping of the charge carriers. From the value of the work function measured by the Kelvin probe and from the position of HOMO level, the hole concentration 2.9 × 1018 cm-3 was obtained. Using this concentration together with the mobility measured by the impedance spectroscopy and the CELIV method, the conductivity 1.2 × 10-5 S cm-1 carried by holes was estimated. Our results widen the work dealing with the mixed electron and proton conductivity of polyaniline films in aqueous solution of acids published in the literature.

Název v anglickém jazyce

Mobility of holes and polarons in polyaniline films assessed by frequency-dependent impedance and charge extraction by linearly increasing voltage

Popis výsledku anglicky

Thin films of semiconducting polyaniline hydrochloride were deposited on glass or silicon substrates. Frequency spectra of impedance measured at several voltages display regions of holes and polarons contributions and enable to evaluate their mobility 2.7 × 10-5 cm2 V-1 s-1 at the electric field of 1 × 105 V cm-1. Good agreement of the average value 2.4 × 10-5 cm2 V-1 s-1 of holes mobility was obtained by another method-charge extraction by linearly increasing voltage (CELIV). A Poole-Frenkel type of electric field dependence of mobility assessed by frequency- dependent impedance points to trapping of the charge carriers. From the value of the work function measured by the Kelvin probe and from the position of HOMO level, the hole concentration 2.9 × 1018 cm-3 was obtained. Using this concentration together with the mobility measured by the impedance spectroscopy and the CELIV method, the conductivity 1.2 × 10-5 S cm-1 carried by holes was estimated. Our results widen the work dealing with the mixed electron and proton conductivity of polyaniline films in aqueous solution of acids published in the literature.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GA16-02787S" target="_blank" >GA16-02787S: Vodivé polymerní kryogely</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Synthetic Metals

ISSN

0379-6779

e-ISSN

—

Svazek periodika

234

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

5

Strana od-do

161-165

Kód UT WoS článku

000418219500019

EID výsledku v databázi Scopus

2-s2.0-85033375053