Issue 39, 2019

Infrared micro-detectors with high sensitivity and high response speed using VO2-coated helical carbon nanocoils

Abstract

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 × 105 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.

Graphical abstract: Infrared micro-detectors with high sensitivity and high response speed using VO2-coated helical carbon nanocoils

Supplementary files

Article information

Article type
Paper
Submitted
27 Maijs 2019
Accepted
10 Sept. 2019
First published
11 Sept. 2019

J. Mater. Chem. C, 2019,7, 12095-12103

Infrared micro-detectors with high sensitivity and high response speed using VO2-coated helical carbon nanocoils

H. Ma, X. Zhang, Z. Zhang, Y. Wang, G. Wang, F. Liu, R. Cui, C. Huang, M. Wang, Y. Wei, K. Jiang, L. Pan and K. Liu, J. Mater. Chem. C, 2019, 7, 12095 DOI: 10.1039/C9TC02833A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements