Investigation of pyroelectric phenomenon in TGS single crystals – A new method using a digital pyroelectric charge meter

Trybus, M.; Proszak, Wladyslaw; Woś, B.

doi:10.1016/j.infrared.2011.02.001

Cited by 8 publications

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“…Triglycine sulfate (TGS) is an important material in the fabrication of IR detectors as this crystal offers both pyroelectric and ferroelectric properties at room temperature. [1][2][3] The monoclinic structure of the TGS single crystal was reported by Hoshino et al 4 who reported its Curie temperature to be 47 °C, in which because of second order ferroelectric phase transition, its space group changes from P2 1 to P2 1 /m. Later, many studies performed on TGS crystals showed its Curie temperature to be around 49-50 °C.…”

Section: Introductionmentioning

confidence: 82%

Performance of crystal violet doped triglycine sulfate single crystals for optical and communication applications

et al. 2015

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Single crystals of 0.01 and 0.02 mol% crystal-violet dye doped triglycine sulfate (NH 2 CH 2 COOH) 3 H 2 SO 4 (TGS) have been grown by slow evaporation technique. Enhanced dielectric, optical, thermal and mechanical behavior has been achieved by dye doping. Monoclinic structures showing particular coloring pattern and morphology change with dye concentration were obtained. Various functional groups and dye incorporation in grown crystals were confirmed qualitatively by FTIR and Raman analysis. A significant increase in Curie temperature from 50 to 55 °C with decrease in maximum permittivity has been observed. UV-Vis spectra showed an increased transmittance window and increased optical band gap from 5.61 to 6.11 eV as a result of doping. Increase in the sharpness and intensity of photoluminescence peak with a blue shift have been observed in doped crystals. The thermal stability and the decomposition temperature were found to increase by about 10 °C in 0.01mol% dye doped TGS. The mechanical strength of the grown crystals was estimated by Vickers microhardness test and was found high for dye doped TGS. High piezoelectric charge coefficient d 33 of 16 pC/N was observed for pure TGS which decreased as a result of dye-effect. The fabrication of patch antenna was carried out after simulating its resonant frequency that makes it suitable for telecommunication applications. ABSTRACTSingle crystals of 0.01 and 0.02 mol% crystal-violet dye doped triglycine sulfate (NH 2 CH 2 COOH) 3 H 2 SO 4 (TGS) have been grown by slow evaporation technique. Enhanced dielectric, optical, thermal and mechanical behavior has been achieved by dye doping. Monoclinic structures showing particular coloring pattern and morphology change with dye concentration were obtained. Various functional groups and dye incorporation in grown crystals were confirmed qualitatively by FTIR and Raman analysis. A significant increase in Curie temperature from 50 to 55 °C with decrease in maximum permittivity has been observed. UV-Vis spectra showed an increased transmittance window and increased optical band gap from 5.61 to 6.11 eV as a result of doping. Increase in the sharpness and intensity of photoluminescence peak with a blue shift have been observed in doped crystals. The thermal stability and the decomposition temperature were found to increase by about 10 °C in 0.01mol% dye doped TGS. The mechanical strength of the grown crystals was estimated by Vickers microhardness test and was found high for dye doped TGS. High piezoelectric charge coefficient d 33 of 16 pC/N was observed for pure TGS which decreased as a result of dye-effect. The fabrication of patch antenna was carried out after simulating its resonant frequency that makes it suitable for telecommunication applications.

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