TY - JOUR
T1 - Ultrafast and low-hysteresis humidity sensors based on mesoporous LaFe0.925Ti0.075O3 perovskite
AU - Alaih, Akhmad Futukhillah Fataba
AU - Triyono, Djoko
AU - Dwiputra, Muhammad Adam
AU - Nugroho, Ferry Anggoro Ardy
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2024/8/1
Y1 - 2024/8/1
N2 - Humidity sensors are omnipresent. Thus, significant efforts have been undertaken to advance their performance, for example, to have a fast detection time, negligible hysteresis, and excellent stability. Despite numerous active research endeavors, establishing a sensor that excels in all these key performances is still challenging. Here, we address this challenge by designing a capacitive-based humidity sensor employing porous LaFeO3 perovskite. Integrating Ti into the perovskite using a sol-gel method, i.e., LaFe0.925Ti0.075O3, results in a 400% increase in specific surface area achieved through pore formation, translating to a 2094% response parameter. Furthermore, due to the rapid equilibrium between adsorption and desorption processes, the sensor achieves ultrafast 4.4 s response time and 1.4 s recovery time, with <1% hysteresis and excellent stability over 28 days, when assessed at 300 K. Our work significantly advances current humidity sensor performance and, in a broader context, emphasizes the efficacy of porous (perovskite) materials for high performance gas detection.
AB - Humidity sensors are omnipresent. Thus, significant efforts have been undertaken to advance their performance, for example, to have a fast detection time, negligible hysteresis, and excellent stability. Despite numerous active research endeavors, establishing a sensor that excels in all these key performances is still challenging. Here, we address this challenge by designing a capacitive-based humidity sensor employing porous LaFeO3 perovskite. Integrating Ti into the perovskite using a sol-gel method, i.e., LaFe0.925Ti0.075O3, results in a 400% increase in specific surface area achieved through pore formation, translating to a 2094% response parameter. Furthermore, due to the rapid equilibrium between adsorption and desorption processes, the sensor achieves ultrafast 4.4 s response time and 1.4 s recovery time, with <1% hysteresis and excellent stability over 28 days, when assessed at 300 K. Our work significantly advances current humidity sensor performance and, in a broader context, emphasizes the efficacy of porous (perovskite) materials for high performance gas detection.
KW - High performance sensors
KW - LaFeO3
KW - Response time
KW - Specific surface area
KW - Transducer materials
KW - Water vapor
UR - http://www.scopus.com/inward/record.url?scp=85190351378&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2024.135810
DO - 10.1016/j.snb.2024.135810
M3 - Article
AN - SCOPUS:85190351378
SN - 0925-4005
VL - 412
JO - Sensors and Actuators B: Chemical
JF - Sensors and Actuators B: Chemical
M1 - 135810
ER -