个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:大阪府立大学
学位:博士
所在单位:物理学院
学科:光学. 凝聚态物理. 微电子学与固体电子学
办公地点:物理学院333室
电子邮箱:lpan@dlut.edu.cn
Infrared micro-detectors with high sensitivity and high response speed using VO2-coated helical carbon nanocoils
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论文类型:期刊论文
发表时间:2019-10-21
发表刊物:JOURNAL OF MATERIALS CHEMISTRY C
收录刊物:EI、SCIE
卷号:7
期号:39
页面范围:12095-12103
ISSN号:2050-7526
摘要:Bolometers for infrared detection by thermally induced resistance changes are indispensable components for extensive applications, in particular for security purposes. Microminiaturization is the direction of developing bolometers with a high performance and high resolution. However, the current micro-bolometers based on VOx are still subject to low responsivity and low response speed. Further development of high-performance micro-bolometers requires new designs of both materials and structures. Herein, we developed helical-shaped micro-bolometers based on the composites of vanadium dioxide (VO2) and carbon nanocoils (CNCs). It was shown that in the composite, the helical structure greatly enhanced the light absorption efficiency, the nanoscale diameter guaranteed small thermal capacitance, and the reversible phase transition of VO2 led to a large resistance change. More importantly, VO2/CNC bolometers showed a non-hysteretic response working in the phase-transition region. Due to the synergistic effect, the VO2/CNC bolometers had a very high temperature coefficient of resistance up to 35%/K, ultrahigh responsivity of 3.3 x 10(5) V W-1, a short response time lower than 2 ms, and a long lifetime of more than 1 000 000 cycles, all of which were superior to those of VOx-based bolometers. Our work reveals an inspiring strategy to prepare high-performance micro-bolometers, which will find potential applications in ultrasensitive thermal imaging and thermo-sensitive sensors.