Titanium dioxide thin films as vacuum ultraviolet photoconductive detectors with enhanced photoconductivity by gamma-ray irradiation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00552194" target="_blank" >RIV/68378271:_____/21:00552194 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.tsf.2021.138637" target="_blank" >https://doi.org/10.1016/j.tsf.2021.138637</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.tsf.2021.138637" target="_blank" >10.1016/j.tsf.2021.138637</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Titanium dioxide thin films as vacuum ultraviolet photoconductive detectors with enhanced photoconductivity by gamma-ray irradiation

Popis výsledku v původním jazyce

We show that titanium dioxide (TiO2) thin films can be used as photoconductive detectors of vacuum ultraviolet (VUV) radiation, with further improvement in performance after recovery from gamma ray irradiation. An initial decrease in photocurrent was observed after irradiation with 3.4 kilo gray gamma rays as oxygen vacancies and trivalent titanium ion states are formed as confirmed by optical and photoluminescence spectroscopies showing a red-shift in the transmission edge, narrowing of the optical band gap, and appearance of a broad absorption band in the 392-528 nm wavelength range. Subsequent recovery of these defects increased the photoconductivity beyond what was displayed by the pristine detector. After recovering, the photosensitivity of the detector increased by a factor of about 8 and 124 compared to its photosensitivity before and immediately after irradiation, respectively.

Název v anglickém jazyce

Titanium dioxide thin films as vacuum ultraviolet photoconductive detectors with enhanced photoconductivity by gamma-ray irradiation

Popis výsledku anglicky

We show that titanium dioxide (TiO2) thin films can be used as photoconductive detectors of vacuum ultraviolet (VUV) radiation, with further improvement in performance after recovery from gamma ray irradiation. An initial decrease in photocurrent was observed after irradiation with 3.4 kilo gray gamma rays as oxygen vacancies and trivalent titanium ion states are formed as confirmed by optical and photoluminescence spectroscopies showing a red-shift in the transmission edge, narrowing of the optical band gap, and appearance of a broad absorption band in the 392-528 nm wavelength range. Subsequent recovery of these defects increased the photoconductivity beyond what was displayed by the pristine detector. After recovering, the photosensitivity of the detector increased by a factor of about 8 and 124 compared to its photosensitivity before and immediately after irradiation, respectively.

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

<a href="/cs/project/EF16_019%2F0000760" target="_blank" >EF16_019/0000760: Fyzika pevných látek pro 21. století</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Thin Solid Films

ISSN

0040-6090

e-ISSN

1879-2731

Svazek periodika

726

Číslo periodika v rámci svazku

May

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

7

Strana od-do

138637

Kód UT WoS článku

000640908300002

EID výsledku v databázi Scopus

2-s2.0-85103380834