Trapped Fluorine Enables Thermally Stable Broadband Photodetection in Graphene/Fluorinated Graphene Heterostructure
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10506246" target="_blank" >RIV/00216208:11320/25:10506246 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=RVL91AcDfG" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=RVL91AcDfG</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/admt.202501241" target="_blank" >10.1002/admt.202501241</a>
Alternative languages
Result language
angličtina
Original language name
Trapped Fluorine Enables Thermally Stable Broadband Photodetection in Graphene/Fluorinated Graphene Heterostructure
Original language description
Fluorinated graphene holds significant promise for optoelectronic applications, yet the instability of carbon-fluorine (C-F) bonds has limited its practical use. This study investigates the long-term operational and thermal stability of a photodetector containing graphene/fluorinated graphene heterostructure (Gr/F-Gr HS). In this design, the top graphene serves as a capping layer that stabilizes fluorine atoms in the bottom fluorinated graphene (F-Gr) via interlayer interactions and suppresses fluorine diffusion. This fluorine-trapping configuration effectively passivates the defects in the F-Gr layer, enhancing both the drain current and optical absorption without altering the device structure. The photodetector achieves > 10(4) A/W responsivity, approximate to 10(12) Jones detectivity, and sub-200 mu s response, enabling frequency resolution up to 1 kHz across a broad spectral wavelength range (300-1150 nm). The device retains approximate to 86% of its initial photocurrent after one year in ambient conditions and remains stable up to 200 degrees C. All-atom molecular dynamics simulations support the experimental results, revealing that the capping layer stabilizes C-F bonds by suppressing fluorine migration and enabling interlayer fluorine redistribution. Together, these findings highlight the superior thermal stability of Gr/F-Gr, reinforcing its promise for advanced optoelectronic applications.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry
Result continuities
Project
<a href="/en/project/EH22_008%2F0004558" target="_blank" >EH22_008/0004558: Advanced MUltiscaLe materials for key Enabling Technologies</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Advanced Materials Technologies
ISSN
2365-709X
e-ISSN
2365-709X
Volume of the periodical
2025
Issue of the periodical within the volume
November
Country of publishing house
DE - GERMANY
Number of pages
10
Pages from-to
e01241
UT code for WoS article
001613973900001
EID of the result in the Scopus database
2-s2.0-105021525700