Ethanol sensing enhancement of low-coast sprayed alpha-Fe2O3 films

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10405446" target="_blank" >RIV/00216208:11320/19:10405446 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=e-sQDpq0Q7" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=e-sQDpq0Q7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/2053-1591/ab5691" target="_blank" >10.1088/2053-1591/ab5691</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ethanol sensing enhancement of low-coast sprayed alpha-Fe2O3 films

Popis výsledku v původním jazyce

This work reports the manufacture and the characterization of alpha-Fe2O3 thin and thick films grown on glass substrates at 350 degrees C using the chemical spray technique and subsequently modified by thermal annealing at 450 degrees C. The Crystalline structure, the surface morphology and the optical properties of the films were investigated. The decreases of the alpha-Fe2O3 film thickness affect all physical properties by improving the optical, structural and mostly ethanol sensing properties wherein we note an improvement of ethanol response from 4 under 5000 ppm for thick layer to 13 under only 100 ppm for thin layer. We note also for this layer, an improvement of phase purity which is confirmed by the increases of optical bandgap from 2.15 eV to 2.19 eV, with guarding the same preferred direction (104). Under ethanol alpha-Fe2O3 thick films exhibit a transition from n to p-type conductivity whereas thin films exhibit only p-type conductivity, the detection mechanism of this behavior was attributed mainly to grain size effects.

Název v anglickém jazyce

Ethanol sensing enhancement of low-coast sprayed alpha-Fe2O3 films

Popis výsledku anglicky

This work reports the manufacture and the characterization of alpha-Fe2O3 thin and thick films grown on glass substrates at 350 degrees C using the chemical spray technique and subsequently modified by thermal annealing at 450 degrees C. The Crystalline structure, the surface morphology and the optical properties of the films were investigated. The decreases of the alpha-Fe2O3 film thickness affect all physical properties by improving the optical, structural and mostly ethanol sensing properties wherein we note an improvement of ethanol response from 4 under 5000 ppm for thick layer to 13 under only 100 ppm for thin layer. We note also for this layer, an improvement of phase purity which is confirmed by the increases of optical bandgap from 2.15 eV to 2.19 eV, with guarding the same preferred direction (104). Under ethanol alpha-Fe2O3 thick films exhibit a transition from n to p-type conductivity whereas thin films exhibit only p-type conductivity, the detection mechanism of this behavior was attributed mainly to grain size effects.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Materials Research Express

ISSN

2053-1591

e-ISSN

—

Svazek periodika

6

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

126409

Kód UT WoS článku

000499423800001

EID výsledku v databázi Scopus

2-s2.0-85076363979