Pyroelectric infrared device with overlap dual capacitor structure sensor

Wu, Qinqin; Li, Xicai; Yang, Xiu‐Qun; Xu, Bin; Wang, Yuanqing

doi:10.1016/j.sna.2018.09.039

Cited by 10 publications

(7 citation statements)

References 14 publications

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“…The peak‐to‐peak voltage V PP of the uncompensated detector was about 10 mV while the V PP of the compensated detector was about 5 mV, which was reduced by about 50%. This further indicated that the compensated detector is more resistant to the external vibration and can further improve the detecting accuracy 24 …”

Section: Resultsmentioning

confidence: 82%

“…When the ambient temperature changed, the two chips will generate equal and opposite charges, so it (5) can offset the thermal current generated by the ambient temperature change, making it more stable in harsh temperature applications. 24 In addition, all pyroelectric materials have a piezoelectric effect. If the pyroelectric material is subjected to an external force, such as a mechanical shock or vibration, the surface will also produce a charge.…”

Section: Resultsmentioning

confidence: 99%

“…This further indicated that the compensated detector is more resistant to the external vibration and can further improve the detecting accuracy. 24…”

Section: Resultsmentioning

confidence: 99%

“…This was ascribed to the adoption of the compensation element. When the ambient temperature changed, the two chips will generate equal and opposite charges, so it can offset the thermal current generated by the ambient temperature change, making it more stable in harsh temperature applications 24 . In addition, all pyroelectric materials have a piezoelectric effect.…”

Section: Resultsmentioning

confidence: 99%

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Compensated pyroelectric infrared detector based on Mn‐doped PIMNT single crystal with enhanced signal stability

Liu

Tang

et al. 2020

J. Am. Ceram. Soc.

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Pyroelectric infrared (PIR) detectors have the characteristics of uncooled operation, simple device structure, high sensitivity, wide spectral response, etc, and provide great potential for applications in temperature measurement, flame/gas detection, and thermal imaging. 1-4 The core of PIR detector is pyroelectric material and the performance of the material is directly related to the capability of the PIR detector. The performances of different pyroelectric materials are characterized by three figures of merits (FOMs), 3,5 including voltage response value F v = ∕ C v 0 r , current response value F i = ∕C v , and detection rate value F d = ∕ C v 0 r tan 1∕2 , where ,C v , and tan are the pyroelectric coefficient, volumetric heat capacity, and dielectric loss tangent, and 0 and r are

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Section: Resultsmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 99%

“…This further indicated that the compensated detector is more resistant to the external vibration and can further improve the detecting accuracy. 24…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Compensated pyroelectric infrared detector based on Mn‐doped PIMNT single crystal with enhanced signal stability

Liu

Tang

et al. 2020

J. Am. Ceram. Soc.

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show abstract

“…Specific detectivity (D*), which is a form of signal-to-noise ratio, is one of the most important parameters that characterize the performance of pyroelectric infrared detectors [7][8][9]. Therefore, there are two ways to improve the D* of pyroelectric infrared detectors: one is to improve responsivity (R V ), which is closely related to the pyroelectric coefficient (p) and heat capacity (H p ) of the pyroelectric materials; the other is to reduce noise (N), which is dominated by different noise mechanisms under different frequencies [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A Two-Step Annealing Method to Enhance the Pyroelectric Properties of Mn:PIMNT Chips for Infrared Detectors

et al. 2020

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Mn:0.15Pb(In1/2Nb1/2)O3-0.55Pb(Mg1/3Nb2/3)O3-0.30PbTiO3 (Mn:PIMNT) pyroelectric chips were prepared by a two-step annealing method. For the two steps, annealing temperatures dependence of microstructure, defects, surface stress, surface roughness, dielectric properties and pyroelectric properties were studied comprehensively. The controlling factors influencing the pyroelectric properties of the Mn:PIMNT crystals were analyzed and the optimum annealing temperature ranges for the two steps were determined: 600–700 °C for the first step and 500–600 °C for the second step. The pyroelectric properties of the thin Mn:PIMNT chips were significantly enhanced by the two-step annealing method via tuning oxygen vacancies and eliminating surface stress. Based on Mn:PIMNT pyroelectric chips annealed at the most favorable conditions (annealed at 600 °C for the first step and 500 °C for the second step), infrared detectors were prepared with specific detectivity D* = 1.63 × 109 cmHz1/2W−1, nearly three times higher than in commercial LiTaO3 detectors.

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Thermodiffusion‐Assisted Pyroelectrics—Enabling Rapid and Stable Heat and Radiation Sensing

Chaharsoughi

Zhao

Crispin

et al. 2019

Adv Funct Materials

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Sensors for monitoring temperature, heat flux, and thermal radiation are essential for applications such as electronic skin. While pyroelectric and thermoelectric effects are suitable candidates as functional elements in such devices, both concepts show individual drawbacks in terms of zero equilibrium signals for pyroelectric materials and small or slow response of thermoelectric materials. Here, these drawbacks are overcome by introducing the concept of thermodiffusion-assisted pyroelectrics, which combines and enhances the performance of pyroelectric and ionic thermoelectric materials. The presented integrated concept provides both rapid initial response upon heating and stable synergistically enhanced signals upon prolonged exposure to heat stimuli. Likewise, incorporation of plasmonic metasurfaces enables the concept to provide both rapid and stable signals for radiation-induced heating. The performance of the concept and its working mechanism can be explained by ion-electron interactions at the interface between the pyroelectric and ionic thermoelectric materials.

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Pyroelectric infrared device with overlap dual capacitor structure sensor

Cited by 10 publications

References 14 publications

Compensated pyroelectric infrared detector based on Mn‐doped PIMNT single crystal with enhanced signal stability

Compensated pyroelectric infrared detector based on Mn‐doped PIMNT single crystal with enhanced signal stability

A Two-Step Annealing Method to Enhance the Pyroelectric Properties of Mn:PIMNT Chips for Infrared Detectors

Thermodiffusion‐Assisted Pyroelectrics—Enabling Rapid and Stable Heat and Radiation Sensing

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