Thermal and electrical behaviour of pvdf infrared matrix sensors

Hammes, P.C.A.; Regtien, Paulus P.L.

doi:10.1080/00150199508208262

Cited by 5 publications

(4 citation statements)

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“…Simonne et al [144] used a similar approach, but did not consider the effect of electrodes. Hammes and Regtien [145] used first order electrical analogs to model the heat transfer process. In order to improve the spatial resolution, they analyzed the polymer layer as either 9 or 40 thin sublayers.…”

Section: Detectors With Silicon Substratesmentioning

confidence: 99%

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Pyroelectric polymer electrets

Bauer

Lang

1996

IEEE Trans. Dielect. Electr. Insul.

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Pyroelectricity is the electrical response of a material to a change in temperature. It exists in polymers which contain spontaneous or frozen polarization resulting from oriented dipoles. This review describes the physical basis for the existence of the pyroelectric effect and discusses its behavior in a number of amorphous, semicrystalline, crystalline and liquid crystalline polymers. Some of the techniques for measurement of the pyroelectric effect are presented and its use in pyroelectric relaxation spectroscopy and thermal analysis is described. The spatial distribution of polarization and space charge through the thickness of polymer films can be determined by several thermal pyroelectric techniques. Recent developments in the integration of pyroelectric polymer infrared detectors with solid-state silicon devices are described. One of the most important recent applications of polymers is in photopyroelectric spectroscopy which can be used for the determination of a number of thermal and optical properties of materials. Finally, some miscellaneous applications in physics, chemistry and biology are presented.Polar liquid crystals (LC) seem to,be very interesting materials for pyroelectric applications, due to the strong orientation of

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Section: Detectors With Silicon Substratesmentioning

confidence: 99%

“…Hammes and Regtien [145] carried out three-dimensional thermal analyzes to test the adequacy of a one-dimensional model of heat conduction. They concluded that a one-dimensional analysis for a polymer on a Si substrate gave reliable results.…”

Section: Detectors With Silicon Substratesmentioning

confidence: 99%

Pyroelectric polymer electrets

Bauer

Lang

1996

IEEE Trans. Dielect. Electr. Insul.

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“…between the penetration depth of the temperature wave λ T [27,28,49], named also the thermal diffusion length [33,45], and modulation frequency of the thermal flux ω shows that the thermal decoupling of the film and substrate can be achieved by decreasing λ T , i.e. by increasing ω (a T is the diffusivity of the media, where the temperature wave propagates).…”

Section: The Fundamental Relationshipmentioning

confidence: 99%

“…Note, that the problem of pyroactive structures integrating into Si-basis of micro-and nano-electronics could not be solved without the transition from the bulk to the thin film technologies. At that the bulk-type [1][2][3][4][5][17][18][19][20][21][22] and membrane-type [37,38] structures were replaced by multilayer film-on-substrate type structures [11,[22][23][24][25][26][27][28][29][30][31][32][33][39][40][41][42][43]. As distinct from the bulk-type structures, operational effectiveness of the film-onsubstrate type structures is defined not only by pyroelectric figures of merits of a ferroelectric film material [1][2][3][4][5], but also by thermal and geometrical parameters of the film and substrate [11,[23][24][25][26][27][28][29][30][31]…”

Section: Introductionmentioning

confidence: 99%

Extrinsic size effect of pyroelectric response of ferroelectric films

Eliseev

Morozovsky

Yelisieiev³

et al. 2016

Journal of Applied Physics

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We developed a theoretical model for the calculation of the main characteristics of pyroelectric response of pyroactive multilayer structures, which are basic elements of modern pyroelectric detectors of radiation and other transducers.In the framework of the proposed model, the dependences of the pyroelectric response frequency spectra on the ferroelectric film thickness have been investigated. It was found that a pronounced extrinsic size effect is inherent to the pyroelectric response frequency spectra, such as the strong thickness dependence of the response maximal value and its frequency position.Thickness dependences of the frequency position of the pyroelectric response maximum and the optimal thickness of the pyroactive ferroelectric film are calculated. The frequency spectra of the pyroelectric current and voltage calculated theoretically are in quantitative agreement with experimental ones for Al/P(VDF-TrFE)/Ti/Si pyroactive structure.Developed procedure is important for improving the sensitivity of pyroelectric devices.Obtained analytical expressions allow us to optimize the performances of pyroactive elements using the existence of the size effect, which depend on pyroactive layer and substrate thicknesses, as well as on the conditions of heat transfer and exchange at corresponding boundaries of the pyroactive structure.

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