High-temperature ultrasensitive FET-based CVD graphene Hall probes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F25%3A63596858" target="_blank" >RIV/70883521:28110/25:63596858 - isvavai.cz</a>
Result on the web
<a href="https://pubs.acs.org/doi/10.1021/acsaelm.5c00351" target="_blank" >https://pubs.acs.org/doi/10.1021/acsaelm.5c00351</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acsaelm.5c00351" target="_blank" >10.1021/acsaelm.5c00351</a>
Alternative languages
Result language
angličtina
Original language name
High-temperature ultrasensitive FET-based CVD graphene Hall probes
Original language description
Hall probes play a critical role in industrial applications such as electrical compasses, current sensors, and motion detectors; however, their performance often deteriorates at high temperatures. This study presents a magnetic-field probe with an ultrahigh sensitivity of 880 Ω/T at 150 °C, achieved using a graphene Hall bar integrated into a field-effect transistor (FET) architecture. To attain this exceptional sensitivity at elevated temperatures, careful control of doping, passivation, and manufacturing defects is essential. The doping level is optimized by adjusting the gate voltage to maintain the carrier concentration near the charge neutrality point (CNP). Further improvements in sensor response at high temperatures, as well as nearly a 2-fold increase in sensitivity at room temperature, are realized through polymer passivation of graphene. In contrast, it is demonstrated that patterning graphene into a narrower channel can increase the number of defects, which reduces the Hall probe’s sensitivity. These findings demonstrate the potential of CVD graphene as a durable and high-performance material for Hall probes in challenging environments.
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
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
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Continuities
V - Vyzkumna aktivita podporovana z jinych verejnych zdroju
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
ACS Applied Electronic Materials
ISSN
2637-6113
e-ISSN
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Volume of the periodical
7
Issue of the periodical within the volume
13
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
5889-5897
UT code for WoS article
001518463400001
EID of the result in the Scopus database
2-s2.0-105008580301