This study introduces a VO_(2)(B)/V_(2)O_(5)nanocomposite thin film,fabricated via low-temperature sputtering(<300℃),as a high-performance thermistor material at high temperatures up to 125℃for long-wave infrared...This study introduces a VO_(2)(B)/V_(2)O_(5)nanocomposite thin film,fabricated via low-temperature sputtering(<300℃),as a high-performance thermistor material at high temperatures up to 125℃for long-wave infrared(LWIR)microbolometers.By incorporating V_(2)O_(5)into the VO_(2)(B)matrix and optimizing the heterointerface,the composite achieves a high temperature coefficient of resistance(TCR)of 2.19(-/K)at room temperature and 1.19(-%/K)at 125℃.The synergistic properties of conductive VO_(2)(B)and insulating V_(2)O_(5)enhance interfacial charge transfer,electron density,and thermal stability.Structural and compositional analyses confirm that oxygen vacancies and optimized band alignment play key roles in improving conductivity and photo-response.The microbolometers exhibit exceptional responsivity(2.3 kV/W)and fast response times(~0.72 ms)at elevated temperature of 125℃,highlighting the VO_(2)(B)/V_(2)O_(5)nanocomposite as a robust and reliable material for LWIR detection in outdoor applications.展开更多
基金supported in part by the Nano·Material Technology Development Program through the National Research Foundation of Korea(NRF)funded by Ministry of Science and ICT(No.RS-2023-00237827)in part by a National Research Foundation of Korea(NRF)grant funded by the Korean government Ministry of Science and ICT(MSIT)(No.RS-2025-00520713)in part by the Korea Institute of Science and Technology Institutional Program(No.2E33542).
文摘This study introduces a VO_(2)(B)/V_(2)O_(5)nanocomposite thin film,fabricated via low-temperature sputtering(<300℃),as a high-performance thermistor material at high temperatures up to 125℃for long-wave infrared(LWIR)microbolometers.By incorporating V_(2)O_(5)into the VO_(2)(B)matrix and optimizing the heterointerface,the composite achieves a high temperature coefficient of resistance(TCR)of 2.19(-/K)at room temperature and 1.19(-%/K)at 125℃.The synergistic properties of conductive VO_(2)(B)and insulating V_(2)O_(5)enhance interfacial charge transfer,electron density,and thermal stability.Structural and compositional analyses confirm that oxygen vacancies and optimized band alignment play key roles in improving conductivity and photo-response.The microbolometers exhibit exceptional responsivity(2.3 kV/W)and fast response times(~0.72 ms)at elevated temperature of 125℃,highlighting the VO_(2)(B)/V_(2)O_(5)nanocomposite as a robust and reliable material for LWIR detection in outdoor applications.
